JP2017074320A - Medical image processing device, program mountable on medical image processing device, and medical image processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for enabling a user himself/herself to easily determine whether a blood vessel shape is a perfect circle without confirming the shape of the cross section of a tubular structure, such as a blood vessel.SOLUTION: The designation of the position of a tubular structure extracted from medical image data is received, and a diameter or a radius of the tubular structure on an orthogonal plane orthogonal to a core wire of the position is calculated on the basis of distance between the core wire and a plurality of positions constituting a contour of the tubular structure, or is calculated on the basis of the area of an area surrounded with the contour of the tubular structure, and is calculated by also using the length of the contour of the tubular structure. Then, display control is performed such that both calculated diameter and radius are displayed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a medical image processing apparatus, a medical image processing method, and a program that can be installed in the medical image processing apparatus.

  In recent years, endovascular treatment using stent grafts has become popular, and it is widely used for the treatment of stenosis or aneurysms such as abdominal large blood vessels, coronary arteries and carotid arteries. A minimally invasive treatment with a catheter with a minimal skin incision is possible, and it can be said that the treatment with stent graft has great advantages for patients from the viewpoint of preservation of brain and kidney function and treatment cost.

  In such stent graft insertion, it is necessary to determine the diameter and length of the stent graft in advance so that an appropriately sized stent graft can be inserted. Patent Document 1 discloses a method for obtaining the diameter and length of a stent graft placed in a blood vessel from a three-dimensional blood vessel model generated based on a CT image. Further, Patent Document 1 discloses that when the blood vessel region is not a perfect circle, the diameter of the ring can be calculated by regarding the blood vessel region as a circumference.

JP 2001-79097 A

However, in the method of Cited Document 1, the user himself / herself must confirm the shape of the blood vessel cross section, determine that the blood vessel region is not a perfect circle, change the calculation method, and can be said to be complicated.
Therefore, an object of the present invention is to provide a mechanism that allows a user to easily determine whether a blood vessel shape is a perfect circle without checking the shape of the cross section of a tubular structure such as a blood vessel.

  In order to solve the above-described problem, the mechanism of the present invention includes an extraction unit that extracts a tubular structure from medical image data, a reception unit that receives designation of a position on the tubular structure extracted by the extraction unit, The diameter or radius of the tubular structure on the orthogonal plane orthogonal to the core wire of the tubular structure at the position received by the receiving means is based on the distance between the core wire and a plurality of positions constituting the outline of the tubular structure. A first calculating means for calculating or calculating based on the area of the region surrounded by the outline of the tubular structure; and the diameter or radius of the tubular structure on the orthogonal plane, Second calculation means for calculating based on the length, the first diameter calculated by the first calculation means, and the second diameter calculated by the second calculation means are displayed. Display control means for controlling display It is characterized by a door.

  By controlling the display in this way, it is possible to easily determine whether or not the blood vessel shape is a perfect circle without the user himself / herself confirming the shape of the cross section of the tubular structure.

2 is a diagram illustrating an example of a hardware configuration and a functional configuration of a medical image processing apparatus 101. FIG. It is a flowchart explaining the flow of the medical image process which concerns on this invention. It is a flowchart explaining the flow of the medical image process which concerns on this invention. It is a flowchart explaining the flow of the medical image process which concerns on this invention. It is a figure which shows a mode that designation | designated of the position on a tubular structure is received from a user. (A) It is a figure which shows the method of calculating | requiring the diameter of the blood vessel using the distance of a core line and an outline. (B) It is a figure which shows the method of calculating | requiring the diameter of the blood vessel using the area of the true lumen 501. FIG. It is the example of a display which displays the diameter of the blood vessel calculated using a different method, (a) The part in which the aortic dissection has arisen, (b) And (c) The normal area | region is shown. It is an example of the screen which shows a blood vessel diameter displayed when a range is designated as a position designation on a tubular structure by a user. It is an example of the screen which shows a blood vessel diameter displayed when a range is designated as a position designation on a tubular structure by a user. It is an example of the screen which shows a blood vessel diameter displayed when a range is designated as a position designation on a tubular structure by a user.

  Hereinafter, a method for displaying the diameter of a cross section of a tubular structure using medical three-dimensional image data generated from volume data (a plurality of slice image data) captured by a CT apparatus will be described in detail with reference to the drawings. explain. The CT image photographed by the CT apparatus used in the present embodiment is an image including a thoracic aorta region photographed in a state where a patient (subject) is laid on a bed. In the present embodiment, an example of calculating the diameter of the thoracic aorta on a plane orthogonal to the core line of the thoracic aorta in order to specify the diameter of the stent graft placed in the thoracic aorta will be described. However, the target to which the present invention can be applied is not limited to the thoracic aorta, but may be any tubular structure such as bronchi, large intestine, and small intestine. Moreover, although the diameter of the tubular structure calculated | required using this embodiment is assumed supposing using when performing stent-graft insertion, it cannot be overemphasized that the intended purpose is not restricted to this.

  FIG. 1A is a diagram illustrating an example of a hardware configuration of a medical image processing apparatus 101 (also referred to as an information processing apparatus) according to the present embodiment. The medical image processing apparatus 101 according to the present embodiment uses volume data (medical three-dimensional image data) generated based on image data captured by a medical image diagnostic apparatus such as a CT apparatus in a state where a contrast agent is administered to a patient. ) Is acquired (read) and image processing is performed. The process of generating the medical 3D image data may be performed by the medical image processing apparatus 101 or may be previously processed by another processing apparatus.

  The CPU 201 comprehensively controls each device and controller connected to the system bus 204. The ROM 202 or the external memory 211 (storage means) implements a BIOS (Basic Input / Output System), an operating system program (hereinafter referred to as OS), which is a control program of the CPU 201, and a function executed by the medical image processing apparatus 101. For this purpose, various programs described later are stored. The RAM 203 functions as a main memory, work area, and the like for the CPU 201.

  The CPU 201 implements various operations by loading a program necessary for execution of processing into the RAM 203 and executing the program.

  An input controller (input C) 205 controls input from an input device 209 such as a keyboard or a pointing device such as a mouse (not shown).

  A video controller (VC) 206 controls display on a display device such as the display 210. The type of the display device is assumed to be a CRT or a liquid crystal display, but is not limited thereto.

  The memory controller (MC) 207 is an adapter to a hard disk (HD), flexible disk (FD) or PCMCIA card slot for storing boot programs, browser software, various applications, font data, user files, editing files, various data, and the like. Controls access to an external memory 211 such as a card-type memory connected via the.

  A communication I / F controller (communication I / FC) 208 connects and communicates with an external device such as a storage device that stores an image acquired by a medical image diagnostic apparatus such as a CT apparatus via a network. Execute communication control processing on the network. For example, Internet communication using TCP / IP is possible.

  Note that the CPU 201 enables display on the display 210 by executing outline font rasterization processing on a display information area in the RAM 203, for example.

  Further, the CPU 201 enables a user instruction with a mouse cursor (not shown) on the display 210.

  Various programs used by the medical image processing apparatus 101 of the present invention to execute various processes described later are recorded in the external memory 211 and executed by the CPU 201 by being loaded into the RAM 203 as necessary. It is.

  Furthermore, definition files and various information tables used by the program according to the present invention are stored in the external memory 211.

  FIG. 1B is a diagram illustrating a functional configuration of the medical image processing apparatus 101. The CPU of the medical image processing apparatus 101 functions as the tubular structure extraction unit 250, the designation receiving unit 251, the orthogonal plane extraction unit 252, the first calculation unit 253, the second calculation unit 254, and the display control unit 255.

The tubular structure extraction unit 250 extracts a tubular structure such as an aorta from medical image data captured by a medical image diagnostic apparatus such as a CT apparatus.
The designation receiving unit 251 receives designation of a position where the diameter or radius on the tubular structure is to be calculated.
The orthogonal plane extraction unit 252 extracts an orthogonal plane at the position received by the designation reception unit 251.
The first calculation unit 253 is a part that calculates the diameter or radius of the extracted tubular structure on the orthogonal plane, and a method of calculating based on the distance between the core line and the contour of the tubular structure, or / and The calculation is performed by using a calculation method based on the area of the region surrounded by the outline of the tubular structure.
The second calculation unit 254 calculates the diameter or radius of the extracted tubular structure on the orthogonal plane based on the contour length of the tubular structure.
The display control unit 255 uses the diameter calculated by the first calculation unit 253 and the diameter calculated by the second calculation unit 254 to display whether or not there is a difference between the diameters. To do.

  In the present embodiment, an explanation will be given based on an example in which an aortic dissection has occurred from the arch aorta of the thoracic aorta to the descending aorta as shown in FIG. The aorta has a three-layer structure consisting of the intima, media and adventitia from the side in contact with the blood. Aortic dissection is the inner side where the blood should flow (true) The blood flows out from the cavity), the media between the inner membrane and the outer membrane dissociates, and the blood accumulates in a place (pseudocavity) where blood should not flow. If such a state is left unattended, there is an extremely high probability that the patient will die, so it is necessary to treat immediately. As such a temporary aortic treatment method, a method of inserting a stent graft (artificial blood vessel) into a dissociated region is known. When such a stent graft treatment is performed, an optimal stent graft diameter can be selected by recognizing the blood vessel diameter after the doctor has expanded the blood vessel.

  By the way, as a method of automatically measuring the diameter of a blood vessel from medical three-dimensional image data acquired by a CT apparatus, a blood vessel core line is extracted, and a blood vessel contour (outer periphery) on a plane orthogonal to the core line is calculated by changing a CT value. Obtained based on (specifically, the position where the CT value is halved compared with the CT value on the core line is the contour), and the average of the line segment connecting the core to each coordinate constituting the contour with respect to this contour There are a method for obtaining a diameter from a value and a method for obtaining a diameter on the assumption that the area is a perfect circle based on the area of a region surrounded by a blood vessel outline. However, in the case of aortic dissection, there are many cases where the blood vessel shape is not a perfect circle depending on the blood pressure state (for example, a half-moon shape or a crescent shape), and the diameter is underestimated when the above method is used. This raises concerns that you will not be able to choose.

  Therefore, in the present embodiment, in addition to any of the above methods (first calculation method), a method of calculating the diameter (second calculation) on the assumption that the length of the blood vessel contour is the circumference of a perfect circle. Method) is also used to calculate the diameter, and based on these results, display control is performed so that the user (doctor) can identify the blood vessel state. Specifically, display control is performed so that the user can easily identify whether there is a difference between the blood vessel diameter calculated by the first calculation method and the blood vessel diameter calculated by the second calculation method. That is, the user can determine that the blood vessel is not a perfect circle when there is a difference and that the blood vessel diameter calculated by the first calculation method should not be trusted, and if there is no difference, It can be determined that the blood vessel is close to a perfect circle and the method calculated by the first calculation method may be trusted.

  Such a specific method will be described in detail with reference to a flowchart for explaining the flow of medical image processing performed by the medical image processing apparatus 101 shown in FIGS. 2 to 4 is realized by reading and executing a control program stored in the CPU 201 of the medical image processing apparatus 101.

  In S201 of FIG. 2, the CPU 201 of the medical image processing apparatus 101 first acquires CT image data acquired by a medical image diagnostic apparatus such as a CT apparatus from an external storage unit (not shown). Then, medical three-dimensional image data, which is image data including the three-dimensional information generated based on this, is generated and prepared. Alternatively, medical three-dimensional image data generated and stored in advance may be acquired from an external storage unit (not shown).

  In S202, the CPU 201 of the medical image processing apparatus 101 extracts an aorta (tubular structure) from the three-dimensional medical image data generated in S201 using a known technique, and extracts a core line of the aorta. Specifically, a core line can be extracted by thinning the aorta of medical three-dimensional image data.

  In step S <b> 203, the CPU 201 of the medical image processing apparatus 101 receives a designation of a position from which a diameter is desired to be extracted from medical 3D image data from the user. As a receiving method, a method of receiving a designation of a position by clicking a mouse on an image displayed on a display or the like as shown in FIG. 5 can be used. Note that the image used for the designation may be a two-dimensional medical image shown in FIG. 5 or a three-dimensional image. Further, a portion where aortic dissection has occurred may be automatically designated without receiving an instruction from the user.

  In S204, the CPU 201 of the medical image processing apparatus 101 extracts an orthogonal plane orthogonal to the core line of the tubular structure at the position received in S203 based on the medical three-dimensional image data.

  In S205, the CPU 201 of the medical image processing apparatus 101 calculates the blood vessel diameter using the first calculation method described above. Details of the processing performed here will be described with reference to the flowchart of FIG.

  FIG. 3A shows a blood vessel contour (outer periphery) on a plane orthogonal to the core line based on the CT value displacement (specifically, the position at which the CT value is halved compared to the CT value on the core line). This is a method for obtaining the diameter from the average value of the line segment connecting the contour to the coordinates constituting the contour with respect to the contour.

  In S301, the CPU 201 of the medical image processing apparatus 101 specifies the position at which the CT value is halved in each direction on the orthogonal plane extracted in S204 as compared to the CT value on the core line as viewed from the core line. Identify blood vessel contours.

  In S <b> 302, the CPU 201 of the medical image processing apparatus 101 calculates the distances connecting the core line 601 and the coordinate positions that constitute the contour of the true lumen 501 as shown in FIG. 6A.

  In S303, the CPU 201 of the medical image processing apparatus 101 calculates an average value of each distance calculated in S302, and calculates a blood vessel diameter assuming that the true lumen 501 is a perfect circle based on the average value (S303). First vessel diameter). However, as shown in FIG. 6A, if the true lumen 501 has a crescent-shaped shape and is not a perfect circle, the diameter calculated here is greatly different from the actual blood vessel diameter.

  FIG. 3B is another calculation method that can be used as the first calculation method, in which the diameter is obtained based on the area of the region specified by the blood vessel contour of the true lumen 501.

  In S <b> 311, as in S <b> 301, the CPU 201 of the medical image processing apparatus 101 specifies the position at which the CT value is halved in each direction on the orthogonal plane extracted in S <b> 204 as compared with the CT value on the core line. By doing so, the outline of the blood vessel is specified.

  In S <b> 312, the CPU 201 of the medical image processing apparatus 101 calculates the area of the region surrounded by the outline specified in S <b> 311.

  In S313, the CPU 201 of the medical image processing apparatus 101 calculates a blood vessel diameter assuming that the true lumen 501 is a perfect circle based on the area (first blood vessel diameter). However, also in this case, as shown in FIG. 6 (b), the true lumen 501 has a crescent-shaped shape, and if it is not a perfect circle, the diameter calculated here is greatly different from the actual blood vessel diameter. become.

  In S206 of FIG. 2, the CPU 201 of the medical image processing apparatus 101 calculates the second blood vessel diameter on the assumption that the length of the blood vessel contour is the circumference of a perfect circle (second calculation method). Details of the processing performed here will be described with reference to the flowchart of FIG. In this embodiment, the diameter is calculated by the second calculation method after the diameter is calculated by the first calculation method, but the order is not limited.

In step S401, the CPU 201 of the medical image processing apparatus 101 calculates the length of the contour using the blood vessel contour specified in step S301 or S311.
In S402, the CPU 201 of the medical image processing apparatus 101 calculates a blood vessel diameter (second blood vessel diameter) assuming that the length of the contour calculated in S401 is a perfect circle circumference.

  In S207 of FIG. 2, the first blood vessel diameter calculated in S205 is compared with the second blood vessel diameter in S206, and it is determined whether the difference between the first blood vessel diameter and the second blood vessel diameter is equal to or larger than a predetermined value. to decide. If the difference between the first blood vessel diameter and the second blood vessel diameter is equal to or larger than a predetermined value (for example, 0.5 mm), it is necessary to be careful when determining the diameter of the stent graft. If it is less than the predetermined value, since any result can be trusted, the process proceeds to S209. Note that the determination in S207 may be made based on whether the ratio of the first blood vessel diameter and the second blood vessel diameter is within a predetermined range.

  In S208, the CPU 201 of the medical image processing apparatus 101 has a difference greater than or equal to a predetermined value in S207, and it can be said that the blood vessel shape is not a perfect circle, so care must be taken when determining the diameter of the stent graft. Control is performed to display the calculation result so that the user can identify this (display control).

  On the other hand, in S209, since the CPU 201 of the medical image processing apparatus 101 can be trusted with any diameter, it does not have to be conspicuous compared to S208. FIG. 7 shows an example of a screen displayed on the display. FIG. 7A is a screen that is displayed when it is determined that there is a difference greater than or equal to the predetermined value in S207, and FIG. 7B is a screen that is displayed when it is determined that there is no less than the predetermined value in S208. It is a screen. The first blood vessel diameter calculated in S205 and the second blood vessel diameter calculated in S206 are displayed in parallel as annotations 710 and 711 together with an orthogonal plane orthogonal to the core line at the position designated by the user. Then, the annotation 710 of the area where the aortic dissection in FIG. 7A is displayed is emphasized more than the annotation 711 of the normal area 701. Thereby, the user can easily grasp that the shape of the blood vessel at the position is not a perfect circle and that care is required when determining the diameter of the stent graft. In the case of a normal region, as shown in FIG. 7B, the second blood vessel diameter calculated by the second calculation method may not be displayed. As an emphasis method, for example, a method of changing the display form of the annotation 710 by changing the size of characters, changing the color, or blinking can be used. Note that the annotation 710 displays the value calculated by the method shown in FIG. 3A as the first calculation method, but the value calculated by the method of FIG. It may be displayed.

  Further, S207 to S209 are not essential processing of the present invention, and the first blood vessel diameter and the second blood vessel diameter are displayed in parallel even if the same display form is always used regardless of the difference in diameter. For example, since the blood vessel shape is not a perfect circle, the user can grasp that attention is necessary when determining the diameter of the stent graft, so that the effect of the present invention can be obtained.

  In the description so far, the case where the position designation performed in S203 is one point has been described. However, a plurality of points may be designated, and in that case, at each point designated as in the screen shown in FIG. The annotations 801 to 804 may be displayed respectively. In addition, as shown in FIG. 9, a designated position and a diameter corresponding to the position may be easily recognized by displaying on a cross-sectional image or a three-dimensional image of the aorta.

  Further, the position designation performed in S203 may be designated as a range by accepting designation of two points of the start point and the end point, and in that case, on the orthogonal planes at locations on a plurality of core wires within the designated range. The diameter at the point may be displayed as shown in FIGS. When accepted as a range, as shown in FIG. 10, a range in which the difference between the first blood vessel diameter and the second blood vessel diameter is greater than or equal to a predetermined value is displayed (broken line 1001), The length of the range may be displayed as annotation 1000. By displaying in this way, the user can refer to not only the diameter of the stent graft but also the length.

  In the present embodiment, the example in which the diameter is calculated and displayed has been described. However, the radius may be calculated and displayed, or both may be displayed.

  In the present embodiment, medical 3D image data generated from volume data captured by a CT apparatus has been described as an example. However, volume data captured by other modalities such as an MRI apparatus as well as a CT apparatus. Medical three-dimensional image data generated in (1) may be used.

  For example, the present invention may be implemented as a system, apparatus, method, program, storage medium, or the like. Specifically, the present invention may be applied to a system including a plurality of devices. You may apply to the apparatus which consists of one apparatus.

  Note that the present invention includes a software program that implements the functions of the above-described embodiments directly or remotely from a system or apparatus. The present invention also includes a case where the information processing apparatus of the system or apparatus is achieved by reading and executing the supplied program code.

  Therefore, the program code itself installed in the information processing apparatus in order to realize the functional processing of the present invention with the information processing apparatus also realizes the present invention. That is, the present invention also includes a computer program for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Examples of the recording medium for supplying the program include a flexible disk, hard disk, optical disk, magneto-optical disk, MO, CD-ROM, CD-R, and CD-RW. In addition, there are magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD-R), and the like.

  As another program supply method, a browser on a client computer is used to connect to an Internet home page. The computer program itself of the present invention or a compressed file including an automatic installation function can be downloaded from the homepage by downloading it to a recording medium such as a hard disk.

  It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, the present invention also includes a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention with an information processing apparatus.

  In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and key information for decryption is downloaded from a homepage via the Internet to users who have cleared predetermined conditions. Let The downloaded key information can be used to execute the encrypted program and install it in the information processing apparatus.

  Further, the functions of the above-described embodiment are realized by the information processing apparatus executing the read program. In addition, based on the instructions of the program, the OS or the like operating on the information processing apparatus performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the information processing apparatus or a function expansion unit connected to the information processing apparatus. Thereafter, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instructions of the program, and the functions of the above-described embodiments are realized by the processing.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

  101 information processing apparatus, 250 tubular structure extraction unit, 251 designation receiving unit, 252 orthogonal plane extraction unit, 253 first calculation unit, 254 second calculation unit, 255 display control unit

Claims (9)

Extraction means for extracting a tubular structure from medical image data;
Accepting means for accepting designation of a position on the tubular structure extracted by the extracting means;
The diameter or radius of the tubular structure on an orthogonal plane orthogonal to the core wire of the tubular structure at the position received by the receiving means is based on the distance between the core wire and a plurality of positions constituting the contour of the tubular structure. Or calculating based on the area of the region surrounded by the outline of the tubular structure;
Second calculating means for calculating the diameter or radius of the tubular structure on the orthogonal plane based on the length of the contour of the tubular structure;
Display control means for performing display control so as to display the first diameter calculated by the first calculation means and the second diameter calculated by the second calculation means;
A medical image processing apparatus.   The display control means performs control so that a case where a difference between the second diameter and the first diameter is greater than or equal to a predetermined value is emphasized rather than a case where the difference is less than a predetermined value. Item 2. The medical image processing apparatus according to Item 1. Extraction means for extracting a tubular structure from medical image data;
Accepting means for accepting designation of a position on the tubular structure extracted by the extracting means;
The diameter or radius of the tubular structure on an orthogonal plane orthogonal to the core wire of the tubular structure at the position received by the receiving means is calculated based on the distance between the core wire and a plurality of positions constituting the contour, or First calculation means for calculating based on the area of the region surrounded by the outline of the tubular structure;
Second calculating means for calculating the diameter or radius of the tubular structure on the orthogonal plane based on the length of the contour of the tubular structure;
The case where the difference between the first diameter calculated by the first calculation means and the second diameter calculated by the second calculation means is greater than or equal to a predetermined value is emphasized more than when it is less than the predetermined value. Display control means for controlling to display
A medical image processing apparatus according to claim 1, wherein: The accepting means can accept the designation of the position of the start point and the end point of the tubular structure,
The first calculation unit and the second calculation unit calculate a diameter or a radius at a plurality of positions within a range specified by the start point and the end point,
The display control means includes a range in which a difference between the second diameter and the first diameter is greater than or equal to the predetermined value on the image of the tubular structure in a range specified by the start point and the end point. The medical image processing apparatus according to claim 2, wherein the medical image processing apparatus displays the information in a distinguishable manner. The accepting means can accept the designation of the position of the start point and the end point of the tubular structure,
The first calculation means and the second calculation means calculate the diameter or radius of the tubular structure at a plurality of positions within a range specified by the start point and the end point,
The medical image processing apparatus according to any one of claims 1 to 4, wherein the display control means displays at the plurality of positions. A method for controlling a medical image processing apparatus, comprising:
The medical image processing apparatus comprises:
An extraction process for extracting the tubular structure from the medical image data;
An accepting step of accepting designation of a position on the tubular structure extracted in the extracting step;
The diameter or radius of the tubular structure on an orthogonal plane orthogonal to the core wire of the tubular structure at the position received in the receiving step is based on the distance between the core wire and a plurality of positions constituting the contour of the tubular structure. Or a first calculation step for calculating based on the area of the region surrounded by the outline of the tubular structure;
A second calculation step of calculating the diameter or radius of the tubular structure on the orthogonal plane based on the length of the contour of the tubular structure;
A display control step of performing display control so as to display the first diameter calculated in the first calculation step and the second diameter calculated in the second calculation step;
A control method. A method for controlling a medical image processing apparatus, comprising:
The medical image processing apparatus comprises:
An extraction process for extracting the tubular structure from the medical image data;
An accepting step of accepting designation of a position on the tubular structure extracted in the extracting step;
Calculate the diameter or radius of the tubular structure on an orthogonal plane orthogonal to the core wire of the tubular structure at the position received in the receiving step based on the distance between the core wire and a plurality of positions constituting the contour, or A first calculation step for calculating based on the area of the region surrounded by the outline of the tubular structure;
A second calculation step of calculating the diameter or radius of the tubular structure on the orthogonal plane based on the length of the contour of the tubular structure;
The case where the difference between the first diameter calculated by the first calculation means and the second diameter calculated by the second calculation means is greater than or equal to a predetermined value is emphasized more than when it is less than the predetermined value. Display control process for controlling to display
A control method. A program that can be installed in a medical image processing apparatus,
The medical image processing apparatus;
Extraction means for extracting a tubular structure from medical image data;
Accepting means for accepting designation of a position on the tubular structure extracted by the extracting means;
The diameter or radius of the tubular structure on an orthogonal plane orthogonal to the core wire of the tubular structure at the position received by the receiving means is based on the distance between the core wire and a plurality of positions constituting the contour of the tubular structure. Or calculating based on the area of the region surrounded by the outline of the tubular structure;
Second calculating means for calculating the diameter or radius of the tubular structure on the orthogonal plane based on the length of the contour of the tubular structure;
Display control means for performing display control so as to display the first diameter calculated by the first calculation means and the second diameter calculated by the second calculation means;
A program characterized by functioning as A program that can be installed in a medical image processing apparatus,
The medical image processing apparatus;
Extraction means for extracting a tubular structure from medical image data;
Accepting means for accepting designation of a position on the tubular structure extracted by the extracting means;
The diameter or radius of the tubular structure on an orthogonal plane orthogonal to the core wire of the tubular structure at the position received by the receiving means is calculated based on the distance between the core wire and a plurality of positions constituting the contour, or First calculation means for calculating based on the area of the region surrounded by the outline of the tubular structure;
Second calculating means for calculating the diameter or radius of the tubular structure on the orthogonal plane based on the length of the contour of the tubular structure;
The case where the difference between the first diameter calculated by the first calculation means and the second diameter calculated by the second calculation means is greater than or equal to a predetermined value is emphasized more than when it is less than the predetermined value. Display control means for controlling to display
A program characterized by functioning as

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