JP4935725B2 - Image measuring apparatus, medical image system, and program - Google Patents

Description

  The present invention relates to an image measurement device, a medical image system, and a program.

  Conventionally, in a diagnosis in the medical field such as orthopedics, an image obtained by photographing a patient with radiation such as X-rays is used. The doctor observes and interprets the radiographic image output on the film, marks the position to be measured on the radiographic image with a red pencil to obtain numerical values and angles for diagnosis, and uses a measuring instrument such as a ruler or a protractor. Measure the distance and angle of the marked position.

  In recent years, digitization has progressed also in the medical field, and most of radiographic images generated in hospitals are stored as digital images in a workstation or PACS (Picture Archiving and Communication System). In the case of a digital image, an image is displayed on a monitor screen, and a line used for measurement (hereinafter referred to as an auxiliary line) is manually or automatically specified on this screen, thereby automatically measuring distance, angle, etc. Since the auxiliary line drawn once can be moved, it is possible to greatly reduce the burden required for measurement by doctors and radiographers.

  For example, Sharp angle is used for diagnosis of osteoarthritis of the hip (acetabular dysplasia). Symptoms of osteoarthritis of the hip include pain in daily activities such as hip pain, movement pain, range of motion limitation, and walking problems. The sharp angle refers to an angle formed by a line passing through the lower end of the tear drop and the outer edge of the acetabulum and a line passing through the lower ends of the left and right tear marks. The normal value is 33 to 38 degrees, and when the sharp angle is 50 degrees or more in the twenties, it is easy to progress to hip joint disease.

  FIG. 11 shows an example of a hip joint image obtained by X-ray imaging of the left and right hip joints from the front side of the human body. The left side of FIG. 11 corresponds to the right side of the human body, and the right side of FIG. 11 corresponds to the left side of the human body. When measuring the sharp angle, first, the hip joint image is displayed on the monitor screen, and the reference auxiliary line L1 passing through the lower right tear mark lower end 51 and the lower left tear mark lower end 52 on the monitor screen, the right tear mark lower end 51 and the right An oblique auxiliary line L2 passing through the acetabular outer edge 53 and an oblique auxiliary line L3 passing through the left tear mark lower end 52 and the left acetabular outer edge 54 are drawn. The right sharp angle θ1 is an angle formed by the reference auxiliary line L1 and the oblique auxiliary line L2, and the left sharp angle θ2 is an angle formed by the reference auxiliary line L1 and the oblique auxiliary line L3.

Further, when an angle indicating a feature for use in diagnosis is measured from a medical image, it is necessary to designate the positions of two straight lines that form the angle. When adjusting the positions of the drawn two straight lines later, if the adjustment is permitted only in a pair, only one straight line cannot be drawn or moved. Therefore, in an image measurement apparatus that draws a plurality of straight lines on a medical image displayed on the display unit and measures the angle between the two drawn straight lines, each drawn straight line is independently changed, edited, or deleted. The technique which can do is proposed (refer patent document 1).
JP 2006-192104 A

  However, as described above, since the drawn auxiliary line can be easily moved on the monitor screen, when the movement is performed such that the positional relationship between the two diagonal auxiliary lines drawn once is changed, the diagonal assistance is performed. In some cases, it is difficult to recognize the correspondence between the line and the measurement target, that is, which angle between the oblique auxiliary line and the reference auxiliary line is the measured sharp angle.

  For example, as shown in FIG. 12 (a), a reference auxiliary line L4 passing through the lower right tear mark and the lower left tear mark on the hip joint image, and an oblique auxiliary line L5 passing through the lower right tear mark bottom and the right acetabular outer edge. When the oblique auxiliary line L6 passing through the lower left tear mark lower end and the left acetabular outer edge is drawn, the angle formed by the reference auxiliary line L4 and the oblique auxiliary line L5 is measured as the right sharp angle, and the reference auxiliary line The angle formed by L4 and the oblique auxiliary line L6 is measured as the left sharp angle.

  After that, as shown in FIG. 12B, when the diagonal auxiliary line L6 is moved to the left side area of the diagonal auxiliary line L5, the correspondence between the diagonal auxiliary line and the measurement target does not change, so the right sharp angle is measured. The angle formed by the reference auxiliary line L4 and the oblique auxiliary line L5 is measured, and the angle formed by the reference auxiliary line L4 and the oblique auxiliary line L6 is measured as the left sharp angle. However, in order for the user to make a determination based on the visual arrangement order, the value measured as the right sharp angle indicates the angle formed by the reference auxiliary line L4 and the diagonal auxiliary line L6, and the value measured as the left sharp angle is the reference There was a risk of misdiagnosing that the angle formed by the auxiliary line L4 and the oblique auxiliary line L5 is misleading.

  The present invention has been made in view of the above problems in the prior art, and it is an object of the present invention to improve operability in measuring the sharp angle of a hip joint image and prevent misdiagnosis.

  In order to solve the above-mentioned problem, the invention described in claim 1 displays a hip joint image obtained by photographing the hip joint portion from the front side of the human body on the monitor screen of the display means, and measures the sharp angle from the displayed hip joint image. An image measuring device for specifying a position for drawing an auxiliary line for measuring a sharp angle in a hip joint image displayed on the monitor screen, and the monitor based on an operation from the operation unit A reference auxiliary line passing through the lower left and right tear marks of the hip joint image displayed on the screen, a first oblique auxiliary line passing through the lower right tear mark and the right outer acetabular edge, and the lower left tear mark and the left outer acetabular edge A drawing control means for sequentially drawing a second oblique auxiliary line passing through the line, and an angle formed between the drawn reference auxiliary line and the first oblique auxiliary line is measured as a right sharp angle, and the drawn reference auxiliary line and With the second diagonal auxiliary line Comprising a measuring means for measuring the angle formed as a left sharp angle, and said drawing control means only permits the rendering of the second diagonal auxiliary lines in the right area of said monitor screen than the first diagonal extension line.

  The invention according to claim 2 is an image measuring device for displaying a hip joint image obtained by photographing a hip joint portion from the front side of a human body on a monitor screen of a display means, and measuring a sharp angle from the displayed hip joint image, An operation unit for designating a position for drawing an auxiliary line for measuring a sharp angle in the hip joint image displayed on the monitor screen, and a hip joint image displayed on the monitor screen based on an operation from the operation unit. A reference auxiliary line passing through the left and right tear mark lower ends, a first oblique auxiliary line passing through the left tear mark lower end and the left acetabular outer edge, and a second oblique auxiliary line passing through the right tear mark lower end and the right acetabular outer edge Are measured in order as the left sharp angle, and the drawing control means for sequentially drawing the reference auxiliary line and the first oblique auxiliary line, and the drawn reference auxiliary line and the second oblique auxiliary line are formed. Set the angle to the right sharp angle And a measurement means for measuring, the drawing control unit, only permits the rendering of the second diagonal auxiliary lines in the left region of the first oblique auxiliary line from the monitor screen.

  According to a third aspect of the present invention, in the image measuring device according to the first or second aspect, the drawing control unit further performs the operation in a region where the drawing of the second diagonal auxiliary line on the monitor screen is prohibited. The graphic indicating the drawing position by the means is changed from the display in the area where the drawing of the second oblique auxiliary line is permitted.

  According to a fourth aspect of the present invention, in the image measuring device according to any one of the first to third aspects, the drawing control means further prohibits the drawing of the second oblique auxiliary line on the monitor screen. The area is displayed in a color different from the area where the drawing of the second oblique auxiliary line is permitted.

  According to a fifth aspect of the present invention, in the image measuring device according to any one of the first to fourth aspects, any one of the drawn first diagonal auxiliary lines and the second diagonal auxiliary lines is drawn. When the line is moved, the diagonal auxiliary line relatively corresponding to the right side of the human body based on the positional relationship in the direction along the reference auxiliary line of the first diagonal auxiliary line and the second diagonal auxiliary line after the movement And the reference auxiliary line are remeasured as a right sharp angle, and the angle between the oblique auxiliary line corresponding to the left side of the human body and the reference auxiliary line is remeasured as the left sharp angle. Is further provided.

  The invention according to claim 6 is an image server device that stores a hip joint image obtained by photographing a hip joint portion from the front side of a human body, and displays a hip joint image acquired from the image server device on a monitor screen of a display means, A medical image system connected to an image measuring device for measuring a sharp angle from a hip image obtained through the communication network so that data communication is possible, the image measuring device in the hip joint image displayed on the monitor screen An operation means for designating a position for drawing an auxiliary line for measuring a sharp angle, and a reference auxiliary line passing through the lower left and right tear marks of the hip joint image displayed on the monitor screen based on an operation from the operation means Drawing control for sequentially drawing a first diagonal auxiliary line that passes through the lower edge of the right tear mark and the outer edge of the right acetabulum, and a second oblique auxiliary line that passes through the lower edge of the left tear mark and the outer edge of the left acetabulum The angle formed between the step and the drawn reference auxiliary line and the first diagonal auxiliary line is measured as a right sharp angle, and the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line is set as a left sharp angle. Measuring means for measuring, and the drawing control means permits drawing of the second diagonal auxiliary line only in a region on the right side of the monitor screen from the first diagonal auxiliary line.

  According to the seventh aspect of the present invention, an image server device that stores a hip joint image obtained by photographing the hip joint portion from the front side of the human body, and a hip joint image acquired from the image server device is displayed on a monitor screen of a display unit. A medical image system connected to an image measuring device for measuring a sharp angle from a hip image obtained through the communication network so that data communication is possible, the image measuring device in the hip joint image displayed on the monitor screen An operation means for designating a position for drawing an auxiliary line for measuring a sharp angle, and a reference auxiliary line passing through the lower left and right tear marks of the hip joint image displayed on the monitor screen based on an operation from the operation means Drawing control for sequentially drawing the first diagonal auxiliary line passing through the lower left tear mark and the outer edge of the left acetabulum and the second diagonal auxiliary line passing through the lower edge of the right tear mark and the outer edge of the right acetabulum The angle formed between the step and the drawn reference auxiliary line and the first diagonal auxiliary line is measured as a left sharp angle, and the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line is set as a right sharp angle. Measuring means for measuring, and the drawing control means permits the drawing of the second diagonal auxiliary line only in the region on the left side of the monitor screen from the first diagonal auxiliary line.

  According to the eighth aspect of the present invention, a computer that displays a hip joint image obtained by photographing the hip joint portion from the front side of the human body on a monitor screen of a display unit and measures a sharp angle from the displayed hip joint image is displayed on the monitor screen. Operation means for designating a position for drawing an auxiliary line for sharp angle measurement in the displayed hip joint image, and based on the operation from the operation means, lower left and right tear mark lower ends of the hip joint image displayed on the monitor screen A drawing that sequentially draws a reference auxiliary line that passes through the first oblique auxiliary line that passes through the lower edge of the right tear mark and the outer edge of the right acetabulum, and a second oblique auxiliary line that passes through the lower edge of the left tear mark and the outer edge of the left acetabulum The control means measures the angle formed between the drawn reference auxiliary line and the first diagonal auxiliary line as a right sharp angle, and sets the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line as a left sharp angle. measure A program for causing a measuring unit functions as, the drawing control unit is a program that allows the drawing of the second diagonal auxiliary lines only in the right area of said monitor screen than the first diagonal extension line.

  According to the ninth aspect of the present invention, a computer that displays a hip joint image obtained by photographing the hip joint portion from the front side of the human body on a monitor screen of a display unit and measures a sharp angle from the displayed hip joint image is displayed on the monitor screen. Operation means for designating a position for drawing an auxiliary line for sharp angle measurement in the displayed hip joint image, and based on the operation from the operation means, lower left and right tear mark lower ends of the hip joint image displayed on the monitor screen A drawing that sequentially draws a reference auxiliary line that passes through the first tear auxiliary line that passes through the lower end of the left tear mark and the outer edge of the left acetabulum, and a second oblique auxiliary line that passes through the lower end of the right tear mark and the outer edge of the right acetabulum The control means measures the angle formed between the drawn reference auxiliary line and the first diagonal auxiliary line as a left sharp angle, and sets the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line as a right sharp angle. measure A program for causing a measuring unit functions as, the drawing control unit is a program that allows the drawing of the second diagonal auxiliary lines only in the left region of the first oblique auxiliary line from the monitor screen.

  According to the first, sixth, and eighth aspects of the invention, the drawing of the second diagonal auxiliary line is permitted only in the region on the right side of the monitor screen from the first diagonal auxiliary line. It is possible to improve miscibility and prevent misdiagnosis.

  According to the second, seventh, and ninth aspects of the invention, the drawing of the second oblique auxiliary line is permitted only in the region on the left side of the monitor screen from the first oblique auxiliary line. It is possible to improve miscibility and prevent misdiagnosis.

  According to the third aspect of the present invention, it is easy to recognize that the graphic indicating the drawing position is in a region where the drawing of the second diagonal auxiliary line is prohibited.

  According to invention of Claim 4, the area | region which permits drawing of a 2nd diagonal auxiliary line, and the area | region to prohibit can be displayed so that identification is possible.

  According to the invention described in claim 5, when any one of the first oblique auxiliary line and the second oblique auxiliary line is moved, the sharp angle is re-measured, thereby preventing misdiagnosis. be able to.

  Hereinafter, an embodiment of a medical image system according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a system configuration of the medical image system 100. As shown in FIG. 1, in the medical image system 100, a RIS (Radiological Information System) 10, a modality 20, an image server device 30, and an image measurement device 40 are connected via a network N so that data communication is possible. ing.

  The RIS 10 performs information management such as medical appointment reservation, diagnosis result report, results management, and material inventory management in the radiology department. The RIS 10 generates examination order information indicating the contents of imaging and diagnosis, and transmits the examination order information to the modality 20.

  The modality 20 is an image generation device that captures a patient based on examination order information transmitted from the RIS 10 and generates image data of a medical image. The modality 20 transmits the image data to the image server device 30. As the modality 20, a CR (Computed Radiography) apparatus, a CT (Computed Tomography) apparatus, an MRI (Magnetic Resonance Imaging) apparatus, or the like is used.

  The image server device 30 is configured by PACS, stores the image data file of the medical image received from the modality 20, and provides the image file in response to a request from an external device such as the image measurement device 40.

  FIG. 2 shows a functional configuration of the image server device 30. As shown in FIG. 2, the image server device 30 includes a control unit 31, an operation unit 32, a display unit 33, a communication unit 34, a ROM (Read Only Memory) 35, and a storage unit 36, and each unit is a bus 37. Connected by.

  The control unit 31 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like, and comprehensively controls the processing operation of each unit of the image server device 30. Specifically, the CPU reads various processing programs stored in the ROM 35 in accordance with an operation signal input from the operation unit 32 or an instruction signal received by the communication unit 34, and a work piece formed in the RAM. Expand to the area and perform various processes in cooperation with the program.

  The operation unit 32 includes a keyboard having cursor keys, numeric input keys, various function keys, and the like, and a pointing device such as a mouse. The operation unit 32 controls operation signals input by key operations or mouse operations on the keyboard. To 31.

  The display unit 33 is configured by an LCD (Liquid Crystal Display), and displays various screens based on display data input from the control unit 31.

  The communication unit 34 is an interface that transmits and receives data to and from external devices such as the RIS 10, the modality 20, and the image measurement device 40.

  The ROM 35 is configured by a nonvolatile semiconductor memory or the like, and stores a control program, parameters and files necessary for executing the program, and the like.

  The storage unit 36 is configured by a hard disk or the like and stores various data. Specifically, the storage unit 36 stores image files, related information, and the like. The image file is an image data file of a medical image received from the modality 20. For example, an image file of a hip joint image obtained by photographing the hip joint portion from the front side of the human body is stored in the storage unit 36. The related information refers to information related to the image of the image file, and is associated with each image file. The related information includes patient information, examination information, and the like. In the case of a hip joint image, the measurement result of the sharp angle is also included. The right sharp angle is the angle formed by the line passing through the left and right tear mark lower edges and the line passing through the right tear mark lower edge and the right acetabular outer edge, and the left sharp angle is the line passing through the left and right tear mark lower edges. The angle formed by the line passing through the lower end of the left tear mark and the outer edge of the left acetabulum (see FIG. 11).

  When there is an image file acquisition request from the image measurement device 40, the control unit 31 reads out the requested image file from the storage unit 36 and transmits it to the image measurement device 40. Further, when the measurement result is received from the image measurement device 40, the control unit 31 stores the received measurement result in the storage unit 36 in association with the measurement target image file.

  The image measurement device 40 is a device for displaying a medical image acquired from the image server device 30 and measuring numerical values and angles used for diagnosis of the medical image, and is configured by a PC (Personal Computer) or the like. For example, in the hip joint image, the image measurement device 40 measures a sharp angle used for diagnosis of osteoarthritis of the hip (acetabular dysplasia).

  FIG. 3 shows a functional configuration of the image measurement device 40. As shown in FIG. 3, the image measurement device 40 includes a control unit 41, an operation unit 42, a display unit 43, a communication unit 44, a ROM 45, and a storage unit 46, and each unit is connected by a bus 47.

  The control unit 41 includes a CPU, a RAM, and the like, and comprehensively controls processing operations of the respective units of the image measurement device 40. Specifically, the CPU reads various processing programs stored in the ROM 45 in response to an operation signal input from the operation unit 42 or an instruction signal received by the communication unit 44, and a work piece formed in the RAM. Expand to the area and perform various processes in cooperation with the program.

  The operation unit 42 includes a keyboard having cursor keys, numeric input keys, various function keys, and the like, and a pointing device such as a mouse. The control unit 42 controls operation signals input by keyboard operation or mouse operation. 41 is output. When the operation unit 42 designates a position for drawing a sharp angle measurement auxiliary line (a reference auxiliary line, a first diagonal auxiliary line, or a second diagonal auxiliary line) in the hip joint image displayed on the monitor screen of the display unit 43. Used for.

  The display unit 43 is configured by an LCD, and displays various screens based on display data input from the control unit 41. Specifically, the display unit 43 displays a medical image such as a hip joint image.

  The communication unit 44 is an interface that transmits and receives data to and from an external device such as the image server device 30.

  The ROM 45 is constituted by a nonvolatile semiconductor memory or the like, and stores a control program, parameters and files necessary for executing the program, and the like.

  The storage unit 46 is configured by a hard disk or the like and stores various data.

  The control unit 41 transmits an acquisition request for an image file of a medical image stored in the storage unit 36 to the image server device 30 via the communication unit 44, and the image file of the medical image is transmitted from the image server device 30. To get. The control unit 41 displays the medical image on the monitor screen of the display unit 43 based on the acquired medical image image file. In the present embodiment, a case where an image file of a hip joint image is acquired and the hip joint image is displayed on the monitor screen of the display unit 43 will be described.

  Based on the operation of the operation unit 42 from the mouse, the control unit 41 includes a reference auxiliary line that passes through the left and right tear mark lower ends of the hip joint image displayed on the monitor screen of the display unit 43, the right tear mark lower end, and the right acetabulum outer side. A first oblique auxiliary line passing through the edge and a second oblique auxiliary line passing through the lower left tear mark lower end and the left acetabular outer edge are sequentially drawn. At this time, the control unit 41 permits the drawing of the second diagonal auxiliary line only in the region on the right side of the monitor screen from the first diagonal auxiliary line. FIG. 4 shows how to obtain coordinates on the monitor screen of the display unit 43 (monitor coordinate system). As shown in FIG. 4, in the monitor coordinate system, the right direction of the monitor screen is the positive direction of the X axis, and the downward direction of the monitor screen is the positive direction of the Y axis.

  In the area where the drawing of the second diagonal auxiliary line on the monitor screen of the display unit 43 is prohibited, the control unit 41 permits the drawing (mouse cursor) indicating the drawing position by the mouse of the operation unit 42 to draw the second diagonal auxiliary line. The display in the area to be changed is changed. Specifically, the control unit 41 displays a normal arrow mark as a mouse cursor in an area where the drawing of the second diagonal auxiliary line is permitted, and as a mouse cursor in an area where the drawing of the second diagonal auxiliary line is prohibited. A prohibition mark (for example, a x mark) is displayed.

  The control unit 41 displays the area where the drawing of the second diagonal auxiliary line on the monitor screen of the display unit 43 is prohibited in a color different from the area where the drawing of the second diagonal auxiliary line is allowed.

  The control unit 41 measures the angle formed between the drawn reference auxiliary line and the first diagonal auxiliary line as a right sharp angle, and sets the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line as a left sharp angle. measure.

  When any one of the drawn first and second oblique auxiliary lines is moved, the control unit 41 moves the first and second oblique auxiliary lines and the second auxiliary line in the image coordinate system after the movement. Based on the positional relationship of the diagonal auxiliary line in the direction along the reference auxiliary line, of the two diagonal auxiliary lines, which is the diagonal auxiliary line that is relatively equivalent to the right side of the human body or that is relatively equivalent to the left side of the human body It is determined whether it is a diagonal auxiliary line. The image coordinate system is a coordinate system on an image unique to the image file. Specifically, the control unit 41 sets the intersection position with the reference auxiliary line of the first oblique auxiliary line and the second oblique auxiliary line to the reference auxiliary line through an end point corresponding to the right side of the human body of the reference auxiliary line. The diagonal auxiliary line with the smaller distance from the vertical straight line is determined to be the diagonal auxiliary line relatively corresponding to the right side of the human body.

  In the present embodiment, the monitor coordinate system on the monitor screen of the display unit 43 is distinguished as (X, Y), and the image coordinate system on the image unique to the image file is distinguished as (x, y).

  The control unit 41 re-measures the angle formed between the oblique auxiliary line corresponding to the right side of the human body and the reference auxiliary line as a right sharp angle, and the oblique auxiliary line and reference auxiliary line relatively corresponding to the left side of the human body. Measure again as the left sharp angle.

Next, the operation will be described.
FIG. 5 is a flowchart showing processing executed in the image server device 30. This process is a process for providing a medical image to be measured to the image measuring device 40, and is realized by software processing in cooperation with the CPU of the control unit 31 and the program stored in the ROM 35. .

  First, when the communication unit 34 receives an image file acquisition request from the image measurement device 40 (step S <b> 1; YES), the control unit 31 reads the requested image file from the storage unit 36. It is transmitted to the image measurement device 40 via the communication unit 34 (step S2).

Next, when the measurement result is received from the image measurement device 40 by the communication unit 34 (step S3; YES), the received measurement result is associated with the image file to be measured by the control unit 31. It is stored in the storage unit 36 (step S4).
Thus, the processing in the image server device 30 ends.

  6, 7, and 8 are flowcharts showing processing executed in the image measurement device 40. This process is realized by software processing in cooperation with the CPU of the control unit 41 and the program stored in the ROM 45.

  As shown in FIG. 6, first, an image file of a hip joint image to be measured is selected by an operation from the operation unit 42, and the communication unit 44 controls the image server device 30 according to the control of the control unit 41. An acquisition request for the image file of the selected hip joint image is transmitted. And the image file of a hip joint image is acquired from the image server apparatus 30 by the control part 41 via the communication part 44 (step S11).

  Next, the control unit 41 displays the hip joint image on the monitor screen of the display unit 43 based on the acquired image file of the hip joint image (step S12).

  Next, the control unit 41 performs an assignment process in which the coordinates on the monitor screen of the display unit 43 corresponding to the mouse position of the operation unit 42 are (Xm, Ym) (step S13).

  Next, as shown in FIG. 9A, the mouse button of the operation unit 42 is pressed by the user in a state where the mouse cursor MC is placed at the position that becomes the starting point of the reference auxiliary line that passes through the lower left and right tear marks, When the start point position of the reference auxiliary line is designated, the control unit 41 acquires the mouse coordinates (Xm, Ym) of the position where the mouse button is pressed, and the first point coordinates (X1, Y1) are X1 = Xm. Y1 = Ym is determined (step S14).

  Next, as shown in FIG. 9 (b), the user presses the mouse button of the operation unit 42 with the mouse cursor MC placed at the end point of the reference auxiliary line, and the end point position of the reference auxiliary line is set. When designated, the control unit 41 obtains the mouse coordinates (Xm, Ym) at the position where the mouse button was pressed, and the second coordinates (X2, Y2) are determined as X2 = Xm and Y2 = Ym. (Step S15).

  Next, the control unit 41 converts the coordinates of the first point (X1, Y1) into the image coordinate system on the hip joint image displayed on the monitor screen of the display unit 43, and the coordinates of the second point ( A reference auxiliary line connecting the coordinates obtained by converting X2, Y2) into the image coordinate system is drawn (step S16).

  Here, the control unit 41 determines whether or not the second X coordinate X2 is larger than the first X coordinate X1 (step S17). If X2 is less than or equal to X1 (step S17; NO), the control unit 41 exchanges the first point coordinates (X1, Y1) and the second point coordinates (X2, Y2) (step S18). That is, in the subsequent processing, the coordinates of the end point with the smaller X coordinate (the left end point of the reference auxiliary line on the monitor screen, that is, the end point corresponding to the right side of the human body) of the end points of the reference auxiliary line are used. The coordinates of the first point (X1, Y1) and the end point with the larger X coordinate (the right end point of the reference auxiliary line on the monitor screen, that is, the end point corresponding to the left side of the human body) are the coordinates of the second point (X2 , Y2).

  When X2 is larger than X1 in step S17 (step S17; YES), or after step S18, as shown in FIG. 9C, the first diagonal assist that passes through the right tear mark lower end and the right acetabular outer edge When the mouse button of the operation unit 42 is pressed by the user while the mouse cursor MC is placed at the position to be the starting point of the line, and the starting point position of the first diagonal auxiliary line is designated, the control unit 41 causes the mouse button to be moved. The mouse coordinates (Xm, Ym) of the pressed position are acquired, and the third point coordinates (X3, Y3) are determined as X3 = Xm and Y3 = Ym (step S19).

  Next, as shown in FIG. 9D, the user presses the mouse button of the operation unit 42 with the mouse cursor MC placed at the end point of the first diagonal auxiliary line, and the first diagonal auxiliary line. When the end point position is designated, the control unit 41 obtains the mouse coordinates (Xm, Ym) of the position where the mouse button is pressed, and the fourth point coordinates (X4, Y4) are X4 = Xm, Y4 = Ym is determined (step S20).

  Next, the control unit 41 converts the coordinate of the third point (X3, Y3) into the image coordinate system on the hip joint image displayed on the monitor screen of the display unit 43, and the coordinate of the fourth point ( A first oblique auxiliary line connecting the coordinates obtained by converting X4, Y4) into the image coordinate system is drawn (step S21).

  Next, the control unit 41 determines whether or not the third X coordinate X3 is larger than the fourth X coordinate X4 (step S22). When X3 is larger than X4 (step S22; YES), the control unit X determines the control point Xα as X3 (step S23). The control point Xα is a reference point for permitting drawing only in a region where the X coordinate is larger than the value when the second oblique auxiliary line is drawn. On the other hand, when X3 is equal to or smaller than X4 (step S22; NO), the control unit 41 determines the control point Xα to be X4 (step S24).

  Next, as shown in FIG. 7, the control unit 41 determines the X coordinate Xm of the position on the monitor screen of the display unit 43 corresponding to the mouse position of the operation unit 42 in step S23 or step S24 in FIG. It is determined whether or not the control point is greater than the control point Xα (step S25). When the X coordinate Xm of the mouse position is equal to or less than the control point Xα (step S25; NO), that is, when the mouse cursor MC is in the area A1 shown in FIG. The mouse cursor MC displayed on the monitor screen is changed to a prohibition mark (for example, x mark) (step S26), and drawing of the second diagonal auxiliary line is prohibited. Further, the control unit 41 displays the area A1 in a different color from the other areas of the monitor screen (area where the drawing of the second oblique auxiliary line is permitted). In this case, a translucent display is used when coloring the region A1 so that the hip joint image and the drawn auxiliary line can be seen.

  On the other hand, when the X coordinate Xm of the mouse position is larger than the control point Xα (step S25; YES), the control unit 41 displays the mouse cursor MC as an arrow mark as usual and permits the drawing of the second oblique auxiliary line. Is done. As shown in FIG. 9 (e), the user operates the mouse of the operation unit 42 in a state where the mouse cursor MC is placed at the start point of the second oblique auxiliary line passing through the lower left tear mark and the outer edge of the left acetabulum. When the button is pressed and the start point position of the second diagonal auxiliary line is designated, the control unit 41 acquires the mouse coordinates (Xm, Ym) of the position where the mouse button was pressed, and the fifth coordinate (X5 , Y5) are determined as X5 = Xm and Y5 = Ym (step S27).

  Next, the control unit 41 determines whether or not the X coordinate Xm of the position on the monitor screen of the display unit 43 corresponding to the mouse position of the operation unit 42 is larger than the control point Xα (step S28). When the X coordinate Xm of the mouse position is equal to or less than the control point Xα (step S28; NO), that is, when the mouse cursor MC is in the area A1 shown in FIG. The mouse cursor MC displayed on the monitor screen is changed to a prohibition mark (step S29), and the drawing of the second diagonal auxiliary line is prohibited.

  On the other hand, when the X coordinate Xm of the mouse position is larger than the control point Xα (step S28; YES), the control unit 41 displays the mouse cursor MC as an arrow mark as usual, and permits the drawing of the second oblique auxiliary line. Is done. As shown in FIG. 9 (f), the user presses the mouse button of the operation unit 42 with the mouse cursor MC placed at the end point of the second diagonal auxiliary line, and the end point position of the second diagonal auxiliary line. Is designated, the control unit 41 obtains the mouse coordinates (Xm, Ym) of the position where the mouse button is pressed, and the coordinates (X6, Y6) of the sixth point are determined as X6 = Xm and Y6 = Ym. (Step S30).

  Next, the control unit 41 converts the coordinate of the fifth point (X5, Y5) into the image coordinate system on the hip joint image displayed on the monitor screen of the display unit 43, and the coordinate of the sixth point ( A second diagonal auxiliary line connecting the coordinates obtained by converting X6, Y6) into the image coordinate system is drawn (step S31).

  Next, the control unit 41 measures the angle formed between the reference auxiliary line and the first oblique auxiliary line as the right sharp angle (step S32), and the angle formed between the reference auxiliary line and the second oblique auxiliary line is the left sharp angle. (Step S33).

  Next, the measurement result is displayed on the monitor screen of the display unit 43 by the control unit 41 (step S34). In the example of FIG. 9F, the values of the right sharp angle and the left sharp angle are displayed as “right sharp angle 64.2 ° left sharp angle 67.2 °” together with the auxiliary lines used for measuring the sharp angle.

  Next, as shown in FIG. 8, the first diagonal auxiliary line or the second diagonal auxiliary line on the hip joint image displayed on the monitor screen of the display unit 43 based on the operation from the operation unit 42 by the control unit 41. It is determined whether any one of the diagonal auxiliary lines has been moved (step S35). Specifically, the mouse button of the operation unit 42 is pressed by the user while the mouse cursor is placed on the diagonal auxiliary line to be moved (selection of the diagonal auxiliary line), and the mouse button is moved to the destination position while pressing the mouse button. When released (determining the position of the oblique auxiliary line after movement), the oblique auxiliary line is moved.

  When any one of the first oblique auxiliary line and the second oblique auxiliary line is moved by the operation from the operation unit 42 (step S35; YES), the control unit 41 returns to FIG. As shown, a straight line L formula (the end point corresponding to the right side of the human body of the reference auxiliary line) obtained by converting the first monitor coordinates (X1, Y1) into the image coordinate system and perpendicular to the reference auxiliary line ( ax + by + c = 0) is acquired (step S36). The formula of the straight line L is expressed in the image coordinate system.

  Next, the coordinates (x7, y7) of the intersection of the reference auxiliary line and the first oblique auxiliary line in the image coordinate system are acquired by the control unit 41 (step S37), and the reference auxiliary line and the second oblique line in the image coordinate system are acquired. The coordinates (x8, y8) of the intersection with the auxiliary line are acquired (step S38). The coordinates (x7, y7) and (x8, y8) of the intersection point indicate the position of the point P or the point Q shown in FIG. 10 in the image coordinate system.

  Next, the control unit 41 causes the diagonal auxiliary line that intersects the reference auxiliary line at the intersection with the smaller distance from the straight line L of the two intersections (x7, y7) and (x8, y8) to be relatively human body. Is determined to be a diagonal auxiliary line corresponding to the right side (step S39).

  Next, the control unit 41 re-measures the angle between the oblique auxiliary line corresponding to the right side of the human body and the reference auxiliary line as the right sharp angle (step S40), and relatively corresponds to the left side of the human body. The angle formed by the oblique auxiliary line and the reference auxiliary line is remeasured as the left sharp angle (step S41).

  Next, the measurement result is displayed on the monitor screen of the display unit 43 by the control unit 41 (step S42), and the process returns to step S35.

  In step S35, when there is no movement of the first oblique auxiliary line or the second oblique auxiliary line on the hip joint image displayed on the monitor screen of the display unit 43 (step S35; NO), the control unit 41 performs measurement. It is determined whether to save the result (step S43). For example, when a save button is selected on the monitor screen of the display unit 43 by an operation from the operation unit 42, the measurement result is saved.

When storing the measurement result (step S43; YES), the control unit 41 sets the measurement result (right sharp angle and left) together with the coordinate values (image coordinate system) indicating the start point and end point of each drawn auxiliary line. (Sharp angle value) is transmitted to the image server device 30 (step S44). If the measurement result is not stored (step S43; NO), the process ends.
Thus, the process in the image measurement device 40 ends.

  As described above, according to the image measuring device 40, since the drawing of the second diagonal auxiliary line is permitted only in the area on the right side of the monitor screen from the first diagonal auxiliary line, the operability in measuring the sharp angle of the hip joint image. Can be improved and misdiagnosis can be prevented.

  In addition, in the area where the drawing of the second diagonal auxiliary line on the monitor screen of the display unit 43 is prohibited, the mouse cursor is changed from the display in the area where the drawing of the second diagonal auxiliary line is allowed. It becomes easier to recognize that the area is in the area where the drawing of the auxiliary line is prohibited.

  In addition, since the area where the drawing of the second diagonal auxiliary line is prohibited is displayed in a different color from the area where the drawing of the second diagonal auxiliary line is allowed, the second diagonal auxiliary line is drawn. The permitted area and the prohibited area can be displayed in an identifiable manner.

  In addition, when any one of the first oblique auxiliary line or the second oblique auxiliary line is moved, the direction along the reference auxiliary line of the first oblique auxiliary line and the second oblique auxiliary line after movement Based on the positional relationship, the angle between the diagonal auxiliary line corresponding to the right side of the human body and the reference auxiliary line is remeasured as the right sharp angle, and the diagonal auxiliary line relatively corresponding to the left side of the human body and the reference Since the angle formed with the auxiliary line is remeasured as the left sharp angle, misdiagnosis can be prevented.

  The description in the above embodiment is an example of the medical image system according to the present invention, and the present invention is not limited to this. The detailed configuration and detailed operation of each device constituting the system can be appropriately changed.

  For example, in the above embodiment, a reference auxiliary line that passes through the left and right tear mark lower ends, an oblique auxiliary line that passes through the right tear mark lower end and the right acetabular outer edge, and an oblique line that passes through the left tear mark lower end and the left acetabular outer edge The case where the auxiliary lines are drawn in the order of the auxiliary lines has been described, but the reference auxiliary line passing through the lower left and right tear marks, the oblique auxiliary line passing through the lower left tear mark and the left outer acetabulum, the lower right tear mark and the right ace The auxiliary lines may be drawn in the order of oblique auxiliary lines passing through the outer edge of the lid. In this case, the control unit 41 obliquely supports the lower right tear mark and the right acetabular outer edge only in the left region of the monitor screen from the oblique auxiliary line passing the lower left tear mark and the left outer acetabular edge. It is only necessary to allow line drawing.

  In the above embodiment, in the area where the drawing of the second diagonal auxiliary line on the monitor screen of the display unit 43 is prohibited, the figure (mouse cursor) indicating the drawing position by the mouse of the operation unit 42 is displayed on the second diagonal auxiliary line. The display in the area that allows drawing is changed, and the area that prohibits the drawing of the second diagonal auxiliary line on the monitor screen is displayed in a different color from the area that allows the drawing of the second diagonal auxiliary line. However, it is possible to change only the mouse cursor without performing color-coded display according to whether or not drawing is permitted. Further, only the color-coded display may be performed without changing the mouse cursor.

  In the above embodiment, the sharp angle is always remeasured when the diagonal auxiliary line is moved. However, the positional relationship between the two diagonal auxiliary lines in the direction along the reference auxiliary line is changed. The sharp angle may be re-measured only when one diagonal auxiliary line exceeds another diagonal auxiliary line.

  In the above description, an example in which a ROM is used as a computer-readable medium storing a program for executing each process is disclosed, but the present invention is not limited to this example. As other computer-readable media, a non-volatile memory such as a flash memory and a portable recording medium such as a CD-ROM can be applied. A carrier wave may be applied as a medium for providing program data via a communication line.

1 is a system configuration diagram of a medical image system according to an embodiment of the present invention. It is a block diagram which shows the functional structure of an image server apparatus. It is a block diagram which shows the functional structure of an image measuring device. It is a figure which shows how to take the coordinate in a monitor screen. It is a flowchart which shows the process performed in an image server apparatus. It is a flowchart which shows the process performed in an image measuring device. It is a flowchart which shows the process performed in an image measuring device. It is a flowchart which shows the process performed in an image measuring device. (A) is an example of a screen when designating the starting point of the reference auxiliary line. (B) is an example of a screen for designating the end point of the reference auxiliary line. (C) is a screen example when designating the start point of the first diagonal auxiliary line. (D) is an example of a screen for designating the end point of the first diagonal auxiliary line. (E) is an example of a screen when designating the start point of the second diagonal auxiliary line. (F) is a screen example when designating the end point of the second diagonal auxiliary line. To explain the straight line passing through the end point corresponding to the right side of the human body of the reference auxiliary line and perpendicular to the reference auxiliary line, the intersection of the reference auxiliary line and the first oblique auxiliary line, and the intersection of the reference auxiliary line and the second oblique auxiliary line FIG. It is a figure for demonstrating a sharp angle. It is a figure for demonstrating the problem in the past.

Explanation of symbols

10 RIS
20 modality 30 image server device 31 control unit 32 operation unit 33 display unit 34 communication unit 35 ROM
36 Storage Unit 37 Bus 40 Image Measuring Device 41 Control Unit 42 Operation Unit 43 Display Unit 44 Communication Unit 45 ROM
46 storage unit 47 bus 100 medical image system N network MC mouse cursor

Claims (9)

An image measuring device for displaying a hip joint image obtained by photographing a hip joint portion from the front side of a human body on a monitor screen of a display means and measuring a sharp angle from the displayed hip joint image,
Operation means for designating a position for drawing an auxiliary line for sharp angle measurement in the hip joint image displayed on the monitor screen;
Based on the operation from the operation means, a reference auxiliary line that passes through the lower left and right tear mark lower ends of the hip joint image displayed on the monitor screen, a first oblique auxiliary line that passes through the right tear mark lower end and the right acetabular outer edge, And a drawing control means for sequentially drawing a second oblique auxiliary line passing through the lower end of the left tear mark and the outer edge of the left acetabulum,
Measurement that measures the angle between the drawn reference auxiliary line and the first diagonal auxiliary line as a right sharp angle, and measures the angle between the drawn reference auxiliary line and the second diagonal auxiliary line as a left sharp angle Means,
With
The drawing control means permits image drawing of the second diagonal auxiliary line only in a region on the right side of the monitor screen from the first diagonal auxiliary line. An image measuring device for displaying a hip joint image obtained by photographing a hip joint portion from the front side of a human body on a monitor screen of a display means and measuring a sharp angle from the displayed hip joint image,
Operation means for designating a position for drawing an auxiliary line for sharp angle measurement in the hip joint image displayed on the monitor screen;
Based on the operation from the operation means, a reference auxiliary line that passes through the lower left and right tear marks of the hip joint image displayed on the monitor screen, a first oblique auxiliary line that passes through the lower left tear mark and the left acetabular outer edge, And a drawing control means for sequentially drawing a second oblique auxiliary line passing through the lower end of the right tear mark and the outer edge of the right acetabulum,
Measurement that measures the angle formed between the drawn reference auxiliary line and the first diagonal auxiliary line as a left sharp angle, and measures the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line as a right sharp angle Means,
With
The drawing control means permits image drawing of the second diagonal auxiliary line only in a region on the left side of the monitor screen from the first diagonal auxiliary line. The drawing control means further displays a graphic indicating a drawing position by the operation means in an area where the drawing of the second diagonal auxiliary line is permitted in the area where the drawing of the second diagonal auxiliary line is prohibited on the monitor screen. And change,
The image measuring device according to claim 1. The drawing control means further displays an area for prohibiting the drawing of the second diagonal auxiliary line on the monitor screen in a color different from an area for permitting the drawing of the second diagonal auxiliary line.
The image measuring device according to claim 1. When any one of the drawn first and second oblique auxiliary lines is moved, the reference assistance of the first and second oblique auxiliary lines after the movement is moved. Based on the positional relationship in the direction along the line, the angle between the oblique auxiliary line corresponding to the right side of the human body and the reference auxiliary line is re-measured as the right sharp angle, and relatively corresponds to the left side of the human body. Re-measurement means for re-measuring the angle formed by the oblique auxiliary line and the reference auxiliary line as a left sharp angle,
The image measurement apparatus according to claim 1. An image server device that stores a hip joint image obtained by photographing the hip joint portion from the front side of the human body, and a hip joint image acquired from the image server device is displayed on a monitor screen of a display means, and a sharp angle is measured from the displayed hip joint image A medical image system connected to the image measurement device via a communication network so that data communication is possible,
The image measuring device is
Operation means for designating a position for drawing an auxiliary line for sharp angle measurement in the hip joint image displayed on the monitor screen;
Based on the operation from the operation means, a reference auxiliary line that passes through the lower left and right tear mark lower ends of the hip joint image displayed on the monitor screen, a first oblique auxiliary line that passes through the right tear mark lower end and the right acetabular outer edge, And a drawing control means for sequentially drawing a second oblique auxiliary line passing through the lower end of the left tear mark and the outer edge of the left acetabulum,
Measurement that measures the angle between the drawn reference auxiliary line and the first diagonal auxiliary line as a right sharp angle, and measures the angle between the drawn reference auxiliary line and the second diagonal auxiliary line as a left sharp angle Means,
With
The drawing control means permits a drawing of the second diagonal auxiliary line only in a region on the right side of the monitor screen from the first diagonal auxiliary line. An image server device that stores a hip joint image obtained by photographing the hip joint portion from the front side of the human body, and a hip joint image acquired from the image server device is displayed on a monitor screen of a display means, and a sharp angle is measured from the displayed hip joint image A medical image system connected to the image measurement device via a communication network so that data communication is possible,
The image measuring device is
Operation means for designating a position for drawing an auxiliary line for sharp angle measurement in the hip joint image displayed on the monitor screen;
Based on the operation from the operation means, a reference auxiliary line that passes through the lower left and right tear marks of the hip joint image displayed on the monitor screen, a first oblique auxiliary line that passes through the lower left tear mark and the left acetabular outer edge, And a drawing control means for sequentially drawing a second oblique auxiliary line passing through the lower end of the right tear mark and the outer edge of the right acetabulum,
Measurement that measures the angle formed between the drawn reference auxiliary line and the first diagonal auxiliary line as a left sharp angle, and measures the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line as a right sharp angle Means,
With
The drawing control means permits a drawing of the second diagonal auxiliary line only in a region on the left side of the monitor screen from the first diagonal auxiliary line. A computer that displays a hip joint image obtained by photographing the hip joint portion from the front side of the human body on a monitor screen of a display means, and measures a sharp angle from the displayed hip joint image,
Operating means for designating a position for drawing an auxiliary line for measuring a sharp angle in the hip joint image displayed on the monitor screen;
Based on the operation from the operation means, a reference auxiliary line that passes through the lower left and right tear mark lower ends of the hip joint image displayed on the monitor screen, a first oblique auxiliary line that passes through the right tear mark lower end and the right acetabular outer edge, And a drawing control means for sequentially drawing a second oblique auxiliary line passing through the lower end of the left tear mark and the outer edge of the left acetabulum,
Measurement that measures the angle between the drawn reference auxiliary line and the first diagonal auxiliary line as a right sharp angle, and measures the angle between the drawn reference auxiliary line and the second diagonal auxiliary line as a left sharp angle means,
Is a program for functioning as
The drawing control means permits a drawing of the second diagonal auxiliary line only in a region on the right side of the monitor screen from the first diagonal auxiliary line. A computer that displays a hip joint image obtained by photographing the hip joint portion from the front side of the human body on a monitor screen of a display means, and measures a sharp angle from the displayed hip joint image,
Operating means for designating a position for drawing an auxiliary line for measuring a sharp angle in the hip joint image displayed on the monitor screen;
Based on the operation from the operation means, a reference auxiliary line that passes through the lower left and right tear marks of the hip joint image displayed on the monitor screen, a first oblique auxiliary line that passes through the lower left tear mark and the left acetabular outer edge, And a drawing control means for sequentially drawing a second oblique auxiliary line passing through the lower end of the right tear mark and the outer edge of the right acetabulum,
Measurement that measures the angle formed between the drawn reference auxiliary line and the first diagonal auxiliary line as a left sharp angle, and measures the angle formed between the drawn reference auxiliary line and the second diagonal auxiliary line as a right sharp angle means,
Is a program for functioning as
The drawing control means permits a drawing of the second diagonal auxiliary line only in a region on the left side of the monitor screen from the first diagonal auxiliary line.

Images