JP6153835B2 - Medical imaging device - Google Patents

Description

  The present invention relates to a medical imaging apparatus having a gantry, and relates to a medical imaging apparatus in which the gantry itself has an illumination function.

  In a medical imaging apparatus such as an MRI apparatus, a mechanism for performing imaging is housed in a gantry, and an examination space (bore) is formed in the approximate center of the gantry. The mechanism unit is a static magnetic field magnet, a gradient magnetic field coil, an RF transmission coil, or the like in the case of an MRI apparatus, and an X-ray tube or an X-ray detector in the case of an X-ray CT apparatus. The subject is carried into the gantry bore while being laid down on the bed apparatus, and the examination is performed there.

  The gantry usually has a white or light-colored light-colored exterior, but the light from the illumination of the room where the medical imaging apparatus is placed does not reach the bore sufficiently, so the inside of the bore becomes dark. Particularly, in a horizontal magnetic field type MRI apparatus, the bore length is long in order to obtain a uniform magnetic field in the examination space, the inside of the bore is dark, and the subject tends to feel uneasy.

  For this reason, in the medical imaging device, an illuminating device is arranged in the vicinity of the subject insertion port (bore opening) of the gantry or a plurality of illuminating devices are arranged so that the darkened portion is reduced as much as possible. (For example, Patent Document 1, Patent Document 2, and Patent Document 3). In addition, in the medical imaging apparatus described in Patent Document 2, a light source is arranged on the front side of the apparatus so as to emit light radially, separately from the illumination that illuminates the inner surface of the bore, and the light from the light source is reflected on the surface of the gantry. It has been suggested to face the front. Patent Document 3 discloses a technique in which a light source is arranged around the front opening in the exterior to brighten the inlet of the bore.

JP 2008-149118 A JP 2013-128749 A JP2013-163018A

  As described above, the conventional medical imaging apparatus is to install an illuminating device in the bore or direct light toward the front side, but when the illuminance on the front side is high, the front side and the side side where light does not reach Since the difference in brightness is large, there is a problem that people and objects existing on the side face are difficult to see.

  In addition, in the medical imaging apparatus, when the subject is carried into the examination space, the bed apparatus on which the subject is placed is connected to the gantry, or the height of the top plate of the bed apparatus is set so as to match the height of the examination space. Work such as adjusting the height is necessary. However, the illumination device provided in the conventional medical imaging apparatus does not function as illumination when performing the above-described work because light from the illumination is blocked by the bed device when the bed device is connected.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a medical imaging apparatus having a function of illuminating a space in which the apparatus is placed. It is another object of the present invention to provide a medical imaging apparatus having an illumination function capable of preventing the visibility of a bed and the periphery of the apparatus due to illumination directed toward the front and improving workability.

  A medical imaging apparatus of the present invention that solves the above problems includes an imaging unit, and a gantry that houses the imaging unit and has a bore into which a subject is inserted, and includes a front surface of the gantry and a side exterior following the front surface. At least a part of which is made of a semi-translucent member, and a light source is disposed inside the exterior. The shape of the boundary region between the front surface and the side surface made of a semi-translucent member is a curved surface shape that diffusely reflects the light from the light source to the rear of the side surface.

  The medical imaging apparatus of the present invention includes a bed connecting portion that is provided on the front surface of the gantry and connects a bed device on which a subject is placed, and is provided at a peripheral portion of the inlet of the bore and on both sides of the bed connecting portion. The exterior is made of a semi-translucent member, and a light source is arranged inside the exterior made of the semi-translucent member.

  In the medical imaging device of the present invention, the light emitted from the light source and transmitted through the semi-transparent member illuminates not only the front surface but also the side surface of the device and the vicinity of the bed connecting portion. Can be prevented. In addition, workability around the bed is improved.

The perspective view which shows the external appearance of the MRI apparatus with which this invention is applied Functional block diagram of MRI system The figure which shows the gantry front surface of the MRI apparatus of 1st embodiment. The figure which shows a part of AA cross section of FIG. (A), (b) is a figure which shows a translucent area | region, respectively (A)-(c) is a figure which shows the structure of a light source and its attachment member, respectively. The figure explaining the course of light source light in the MRI apparatus of a first embodiment. (A), (b) is a figure which respectively shows an example of the drive control of the light source in the MRI apparatus of 1st embodiment. The figure which shows the gantry inner surface of the MRI apparatus of 2nd embodiment, and is a figure equivalent to the BB cross section of FIG. The figure which shows CC cross section of FIG. The figure explaining the course of light source light in the MRI apparatus of a second embodiment.

  Hereinafter, embodiments of the medical imaging apparatus of the present invention will be described. The medical imaging apparatus of the present embodiment includes an imaging unit (20) and a gantry (10) that houses the imaging unit and has a bore (internal space) into which the subject is inserted. The exterior area (11A, 15A) including the vicinity of the mouth is made of a semi-translucent member, and the light source (30) is arranged inside the area.

  FIG. 1 shows an embodiment in which the medical imaging apparatus of the present invention is applied to an MRI apparatus. The MRI apparatus shown in FIG. 1 is a horizontal magnetic field type MRI apparatus, and includes a gantry 10 having a tunnel-like bore, an imaging unit (not shown) housed in the gantry 10, and a bed apparatus 40 on which a subject is placed. It has.

  The gantry 10 has a substantially cylindrical shape, and a space (imaging space) into which a subject is inserted is formed as a tunnel-like bore. Here, the side on which the subject is inserted is referred to as the front surface 11, and the opposite side is referred to as the back surface 12. A surface surrounding the bore is referred to as an inner surface 13. The side surface 15 of the gantry 10 that connects the front surface and the back surface extends so that both ends thereof are in contact with or close to the floor surface on which the MRI apparatus is installed. A more detailed shape and material of the gantry 10 will be described later together with the arrangement of the light source 30 arranged in the gantry 10.

  As shown in the functional block diagram of FIG. 2, the imaging unit 20 includes a static magnetic field generating magnet 21 that generates a horizontal magnetic field, and a gradient magnetic field coil 22 that applies a magnetic field gradient to a static magnetic field space generated by the static magnetic field generating magnet 21. An RF transmission coil 23 for applying a high frequency magnetic field to the subject, an RF receiving coil 24 for detecting an echo signal as a high frequency magnetic field in response from the subject, and a gradient magnetic field power source 25 for driving the gradient magnetic field coil An RF transmitter 26 that generates a high-frequency signal and applies it to the RF transmitter coil 23, a signal processor 27 that processes an echo signal received by the RF receiver coil 24, and creates an image; And a control unit 28.

  The static magnetic field generating magnet 21 is composed of a normal conducting magnet or a superconducting magnet, and is installed in the gantry 10 so that the central axis of the coil constituting the magnet substantially coincides with the center of the bore. When the static magnetic field generating magnet 21 is a superconducting magnet, a cryo device for maintaining the magnet at an ultra-low temperature is provided. In the following description, the static magnetic field generating magnet 21 may be referred to as a coil device including a cryo device. The gradient magnetic field coil 22 and the RF transmission coil 23 are disposed between the static magnetic field generating magnet 21 and the imaging space. The RF receiving coil 24 can also serve as the RF transmitting coil 23, and may be arranged in the vicinity of the subject in the imaging space or attached to the subject.

  The signal processing unit 27 and the control unit 28 are integrated with an operation console provided with an input / output device 29, and are installed in a room (operation room) different from the examination room in which the gantry 10 is placed. It is connected to each magnet and coil stored in the gantry with a cable or the like. The examination room is magnetically shielded from other rooms. In other words, the gantry 10 stores some elements constituting the imaging unit, and another part is installed outside the gantry 10.

  The MRI apparatus of this embodiment is characterized in that the gantry 10 itself operates as an illumination apparatus having a predetermined function. Although there are known devices in which an illumination device is attached to the front surface of the gantry 10 and those employing an illumination device that illuminates the internal space in order to brighten the internal space (bore), the MRI apparatus of this embodiment is a gantry. A light source is disposed inside, and at least a part of the gantry is made of a material that transmits light from the light source to the outside, and the gantry 10 itself functions as an illumination device.

  Hereinafter, each embodiment of the gantry 10 that functions as a lighting device will be described. In the following embodiments, the MRI apparatus shown in FIG. 1 will be described as an example of the medical imaging apparatus. However, the medical imaging apparatus provided with a gantry is not limited to the MRI apparatus.

<First embodiment>
In the medical imaging apparatus of this embodiment, the gantry (10) has a front surface (11) provided with a bore entrance and a side surface (15) continuous with the front surface, and includes a front surface including the vicinity of the bore entrance. At least a part of the side surface continuous with at least a part and at least a part of the front surface is made of a semi-translucent member. Moreover, the shape of the area | region which consists of a translucent member is a curved-surface shape which diffusely reflects the light from a light source (30) to the back of a side surface.

  In this embodiment, the outer region (11A) made of a translucent member has a first region (11A) surrounding the insertion port of the bore and the lower end of the gantry located below the first region. Up to the second region (11B). In this case, the second region (11B) is divided into two regions with the connecting portion (50) connecting the bed apparatus (40) to the insertion port of the bore, and a light source is provided inside each divided region. Can be arranged.

  FIG. 3 is a front view of the gantry of the MRI apparatus of this embodiment, and FIG. 4 is a cross-sectional view taken along line AA of FIG. In FIG. 3, the bed apparatus 40 is omitted.

  As shown in the drawing, the gantry front surface 11 of the MRI apparatus includes a central panel 111 that surrounds the insertion hole of the bore at the substantially center and is connected to the inner surface of the bore, a front panel 112 on the outer side, and a lower side (floor side) of the front panel 112. And a lower front panel 114 located at the front. As shown in FIG. 4, the center panel 111 is inclined inward to widen the bore entrance. The front panel 112 is continuous with the outer periphery of the central panel 111 and includes a vertical surface. A sub-monitor 291 that functions as an additional device for the input / output device 29 placed in the operation room is installed on the front panel 112. The front panel 112 is divided into two on both sides of the lower panel 114, extends downward so as to sandwich the front lower panel 114, and reaches the lower end of the gantry. A connecting portion 50 is provided below the front lower panel 114 to connect the bed apparatus 40.

  The center panel 111, the front panel 112, and the front lower panel 114 that constitute the front surface of the gantry are curved surfaces that are substantially continuous with each other, and are continuous with the side panel that constitutes the side surface 15 of the gantry. Here, “continuous” means that the shapes are continuous, and a panel composed of separate members may be assembled or may be integrally formed.

  The shape of the back surface 12 of the gantry is substantially the same as that of the front surface and is not shown. However, the connecting portion 50 of the bed apparatus is not provided on the back surface, and the portion corresponding to the connecting portion 50 is a lower panel or Covered with a front panel.

  The side surface 15 that connects the front surface 11 and the back surface 12 is provided on the left and right side panels 151 that are continuous with the front panel 112, the top panel 152 that is continuous with the left and right side surfaces 151 and is the upper surface of the gantry 10, and the lower side of the side panel 151. And a lower side panel 153 that covers the bottom of the gantry. The side panel 151 and the top panel 152 are continuous in shape and constitute a part of a cylinder as a whole. The side lower panel 153 extends to the front side so as to wrap around both sides of the bed connecting part 50, and is connected to the front panel 112 located on both sides of the bed connecting part 50 to provide a space into which the lower part of the bed apparatus is inserted. ing. There is a bed connecting portion 50 facing this space.

  The inner surface 13 that defines the bore of the gantry 10 includes a front central panel 111, an arc-shaped inner panel 131 that connects the rear central panel, and a bottom panel 132. Rails (not shown) for moving the top plate of the bed apparatus 40 are laid on the bottom panel 132.

  Each of the panels constituting the outer surface of the gantry 10 described above is made of a relatively lightweight and good moldable material such as FRP or heat resistant plastic. Among them, the central panel 111, the front panel 112, the side panel 151, and the side lower panel 153 are made of a translucent material, and the imaging unit 20 such as a static magnetic field magnet and the light source 30 disposed inside the gantry 10 are viewed from the outside. Although not possible, it is configured to transmit light from the light source 30 to the outside. As the translucent material, a material in which a pigment or a light diffusing material is dispersed in the above-described plastic or the like can be used, and the degree of translucency can be adjusted by adjusting the content thereof. . Further, the degree of translucency may vary depending on the panel. For example, the side lower panel 153 may be made of a highly translucent material rather than the side panel 151, the illuminance at the foot may be made higher, or the front panel 112 than the center panel 111 may be made of a highly translucent material, The illuminance around the device may be increased. The adjustment of the illuminance may be achieved by adjusting the translucency of each panel and changing the luminance of the light source 30 depending on the region.

  5 (a) and 5 (b), the exterior area | region formed with the translucent material among the panels is shown with an oblique line. In this embodiment, the center panel 111 and the front panel 112 correspond to the exterior area 11A around the entrance of the bore, and the lower side of the side lower panel 153 wrapping around the front is the exterior area 11B including the vicinity of the bed connecting portion 50. Equivalent to. Further, the side panel 151 provides a region 11C that transmits light from the light source 30 and functions as illumination on the side surface of the apparatus. In the present embodiment, the upper panel 152 is made of an opaque material that does not transmit light. This prevents the loss of light from the top surface and the resulting decrease in brightness. However, it goes without saying that the upper panel 152 and the lower front panel 114 may be made of a semi-translucent material similar to the front panel 112 and the side panel 151.

  The light source 30 is disposed inside the gantry 10 and in the vicinity of the boundary between the front panel 112, the side panel 151, and the side lower panel 153. In the example shown in FIG. 3, the light sources 30 are arranged in a line on both sides along the shape of the outer edge of the front panel 112, from a position substantially the same height as the upper end of the center panel 111 to the lower end of the gantry. The light source 30 is preferably a light source that does not affect the static magnetic field when the imaging apparatus is an MRI apparatus. Specifically, a point light source or a linear light source using an LED or an optical fiber (scattering type) can be employed. In the case of a point light source, a plurality of point light sources arranged in a vertical direction at a predetermined interval are arranged. The number of columns is one or more on one side. In the case of a line light source, a scattering type optical fiber is disposed so that the longitudinal direction is the vertical direction, and a point light source such as an LED is disposed at the end. The number of optical fibers is also one or more on each side.

  A scattering-type optical fiber is a fiber (core) made of a material in which scattering particles are dispersed in a translucent resin, and is coated with a cladding material. Unlike a transmission-type optical fiber, a light source such as an LED is provided on the end face. By arranging, uniform light emission can be obtained along the fiber. In addition, by changing the type of LED or the like arranged on the end face to one having a different emission color, light of various colors can be extracted from the fiber.

  The color of the light source may be a single color such as white, or a mixed color may be produced by combining light sources having different colors. For example, white light may be emitted by combining light sources of three primary colors of red, blue, and green. In the case of a point light source, these three primary color light sources may be alternately arranged, or a plurality of light sources having the three primary color light sources arranged in the horizontal direction may be arranged in the vertical direction. In the case of a linear light source, a plurality of optical fibers that emit different colors may be arranged, or a single optical fiber may be arranged, and the color of the point light source arranged on the end face thereof may be changed. .

  The light source 30 can be used in combination with a light diffusing member or a reflecting member. FIG. 6 shows a specific configuration example of the light source. FIG. 6 shows a structure viewed from a direction orthogonal to the longitudinal direction of the arrangement direction of the light sources 30 or a linear light source. FIGS. (B) shows a case where a light source fixed to an opaque substrate and irradiating light on substantially one side of the substrate is used. 6A and 6B show a combination of the light source 30 and the light diffusing member 60, and FIG. 6C shows a combination of the light source 30 and the reflection member 70. In the figure, each panel of the gantry is shown as a panel 100 as a representative.

  In the structure shown in FIGS. 6A and 6B, the light source 30 is covered with a light diffusing member 60, the light traveling from the light source 30 toward the panel 100 is diffused, and the shape of the light source (dots and The line is blurred. The light from the light source 30 is diffused and softened also by the semi-transparent member constituting the panel. However, by arranging the light diffusing member 60 around the light source 30, a soft light can be produced. it can. As the light diffusing member 60, a resin plate or resin film in which light diffusing particles or fibers are dispersed, a coated paper in which both surfaces of Japanese paper are coated with resin, etc. can be used. It is possible to adjust the degree of light diffusibility by adjusting.

  Although not shown, it is possible to have a function of diffusing light on the panel 100 side. Specifically, the surface (outer surface or inner surface) of the panel 100 is processed or matted.

  In the structure shown in FIG. 6C, the reflecting member 70 is disposed on the opposite side to the panel 100 to increase the amount of light traveling toward the panel 100 side. Of the light traveling toward the opposite side of the panel 100, the light that strikes the surface of a container (not shown) that houses a static magnetic field magnet or the like is reflected to some extent on the surface of the container. Therefore, the light utilization efficiency can be improved by reflecting the light. The reflection member 70 may be a known material such as a film made of a white resin, white ceramics, or metal, but in the case of an MRI apparatus, it is an insulator (resin film or ceramics) in order to prevent the generation of eddy currents. It is preferable. Also in the structure of FIG. 6C, a light diffusing member 60 as shown in FIGS. 6A and 6B can be used together.

  Instead of or in combination with the reflecting member 70, the surface of the container that houses the static magnetic field magnet or the like can be made reflective. Specifically, a container (cover) that covers a static magnetic field magnet or the like is made of a light-reflective material, or a reflective paint is applied to the surface.

  Next, the illumination function of each panel of the gantry 10 and the light source 30 in the above configuration will be described with reference to FIG. FIG. 7 is an enlarged view of a part of FIG.

  As shown in FIG. 7, the light source 30 is arranged using a space between an exterior (panel) of the gantry 10 and a coil device 21 such as a static magnetic field magnet. Since the central panel 111 on the front side of the gantry is inclined inward toward the bore, the space between the panel and the coil device 21 is narrow, but in the vicinity of the boundary region where the front panel 112 and the side panel 151 are joined. Is relatively wide. In view of this, the light source 30 and its associated devices, such as a light diffusing member, a reflecting member, or a supporting device thereof, are arranged using this relatively wide space.

  The side panel 151 facing the space in which the light source 30 is disposed has a gently curved surface from the front to the side. By adopting such a shape, a part of the light L2, L3,..., Which is directed rearward from the light L1 that is perpendicular to the side panel 151 that is a curved surface, out of the light emitted from the light source 30, Although it is transmitted and emitted to the outside, the rest is reflected on the inside of the side panel 151, reflected on the surface of the coil device 21, hits the rear part of the side panel 151, and here also partly transmits the side panel 151. Then, it is discharged to the outside, and a part further moves backward. As described above, the light from the light source 30 travels backward while being attenuated, so that illumination light whose luminance gradually decreases from the front surface to the back surface is obtained on the side surface of the apparatus.

  In order to obtain substantially uniform luminance on the side surface, a light source can be arranged on the back side as well as the front side inside the panel.

  With respect to the front illumination function, as shown in FIGS. 3 and 5, point light sources are arranged substantially vertically on both sides of the bore, or line light sources are arranged vertically, and exterior areas 11A and 11C are arranged. Since it is composed of a semi-translucent member, the light from the light source reaches from the periphery of the bore to both sides of the bed connecting part, that is, to the lower end of the gantry. Adjustment work can be performed in a bright environment. Further, the light from the light source becomes light diffused through a semi-translucent member in a relatively wide area, so that a difference in brightness is hardly generated.

  Furthermore, the MRI apparatus according to the present embodiment employs a configuration in which brightness and color can be made different between the region 11A and the region 11C shown in FIG. As described above, as a method of changing the luminance depending on the region, there is a method of changing the translucency of the panel constituting the region, but in this embodiment, the luminance and emission color of the light source arranged for each region. To change the lighting dynamically. As a method of changing the luminance and emission color of the light source, there are a method of arranging light sources having different outputs for each region and a method of changing the number and density of light sources to be arranged, and either method can be used.

  Hereinafter, a specific example in which the luminance is dynamically changed will be described with reference to FIG. Here, the light source arranged for illumination of the region 11A is a first light source, and the light source arranged for illumination of the region 11B is a second light source. The control of each light source may be a function of the control unit (FIG. 2: 28), or a control device (light source control unit) for controlling the light source may be provided separately. Further, the light source switch may be manually turned on, off, or dimmed.

  FIG. 8A shows a case where the first light source and the second light source are turned ON / OFF or the output is controlled based on a control signal from the light source control unit.

  In the preparatory stage before the inspection starts, only the first light source is turned on at a low output, and the area around the apparatus from the front to the side of the apparatus is brightened with soft light. When the bed apparatus is connected to the gantry for inspection, the output of the first light source becomes high and the second light source is turned on. At this time, the brightness of the second light source is higher than the brightness of the first light source. As a result, the feet for adjusting the height of the bed apparatus and the position of the top board are brightly illuminated, and the operator can easily perform the installation of the top board and the insertion of the subject. When the inspection is started, the second light source is turned off, and the first light source is kept in the ON state at a high output. The gantry is brighter than when it is waiting, indicating that it is being examined. When the examination is completed and the subject is carried out of the bore, the second light source is turned on, and the top plate is moved and the top plate is lowered. At the time when each operation associated with the inspection is finished, the first light source is switched to a low output. In addition, when the illumination (3rd light source) which illuminates the inside of a bore is provided, the illumination will be set to ON during a test | inspection.

  FIG. 8A shows a case where the output is simply changed, but it is also possible to change the color for each region or change the color in the same region, and the light source having a different emission color for each region. It can be realized by arranging. In FIG. 8B, the first region 11A includes a plurality of light sources having different colors, for example, a light source in which a large number of red light sources, blue light sources, and green light sources are alternately arranged, and switches these to change the emission color. An example is shown. Here, the case where ON / OFF control is performed by the control signal is also shown.

  For example, before the inspection (during standby), all three light sources are turned on to be white light. Next, while performing operations such as connecting the bed apparatus, adjusting the height, moving the top board, etc., only the green light source is turned on to produce green light. Although the light source (second light source) arranged in the region 11B is not shown, the second light source is turned on as shown in FIG. When the insertion of the subject into the bore is completed and the examination is started, only the red light source is turned on to make red light. This informs that the examination is in progress. When the inspection is completed, the red light source is switched to the blue light source. After all the operations are finished, all the light sources are turned on to obtain white light. By changing the color in this way, the progress of the inspection can be visually notified.

  The light source control shown in FIG. 8 is an example, and the luminance and color changes of the light sources arranged in each region can take various forms depending on the state of inspection and the usage state.

  According to the present embodiment, at least a part of the side panel continuous to the front panel is formed of a semi-translucent member, thereby guiding light from the light source disposed on the front side to the rear side (back side). In addition, the device itself functions as illumination, and it is possible to prevent a decrease in visibility due to a difference in brightness between the front side and the side surface. In particular, by making the boundary between the front panel and the side panel into a curved surface, the amount of light going backward can be increased.

  In addition, according to the present embodiment, the light source is arranged so as to sandwich the connecting portion on both sides of the connecting portion of the bed apparatus located below the bore, so that the subject is inserted into the bore through the connection of the bed apparatus. Can be performed under bright illumination, and operability is improved. In particular, visibility is improved by making the luminance of the light source near the coupling portion higher than the luminance of the other light sources.

  Furthermore, according to this embodiment, the brightness and color of the light source can be changed depending on the region or within the same region, so that the progress of the inspection can be notified by the illumination light.

<Second embodiment>
The medical imaging apparatus of the present embodiment is characterized in that, in addition to the light source on the front side described above, a light source is also provided on the inner surface that defines the bore of the gantry. That is, in the medical imaging apparatus of the present embodiment, the gantry (10) has an inner surface (13) that defines the internal space of the bore, and at least a part of the exterior that constitutes the inner surface is made of a semi-translucent member. Moreover, a part of inner surface which consists of a translucent member contains the area | region along the both sides of the bed apparatus (top plate) inserted in a bore, and the light source is arrange | positioned inside the said area | region. Although there are devices having illumination for illuminating the inner surface of conventional medical imaging devices (for example, Patent Document 2), the medical imaging device according to the present embodiment is arranged on the outside of the exterior. A feature is that the light source is arranged inside the exterior, and the entire inner surface is a lighting device.

  Hereinafter, with reference to FIG. 9 and FIG. 10, the present embodiment will be described focusing on elements added to the first embodiment. 9 and 10, the same elements as those illustrated in FIG. 3 and the like are denoted by the same reference numerals and description thereof is omitted. Here, the MRI apparatus will be described as an example of the medical imaging apparatus, but a medical imaging apparatus other than the MRI apparatus may be used.

  Also in the MRI apparatus of this embodiment, the inner surface 13 that defines the bore of the gantry 10 includes an arc-shaped inner panel 131 and a bottom panel 132. Rails (not shown) for moving the top plate of the bed apparatus 40 are laid on the bottom panel 132. A light source 35 is disposed along the joint portion inside the inner panel 131 in the vicinity of the joint portion between the inner panel 131 and the bottom panel 132. The light source 35 can be used when inserting the subject into the bore and as illumination during the examination.

  As the light source 35, an LED or a scattering type optical fiber can be used in the same manner as the light source 30 laid on the front surface. However, since the space for arranging the light source and its attached devices is narrower than that on the front surface side, the optical fiber can be used. Is preferred. In the figure, one scattering type optical fiber is disposed on each side as the light source, but two or more may be used, or they may be added at a position away from the joint between the inner panel 131 and the bottom panel 132. . Further, a light diffusing member 60 as shown in FIGS. 6A and 6B or a reflecting member 70 as shown in FIG.

  The inner surface panel 131 is formed of a semi-translucent member at least in the vicinity of the light source 35 and can irradiate the bore with light from the light source 35. The design of the light in the bore changes depending on the size of the region constituted by the semi-translucent member. For example, when the entire inner panel 131 is semi-translucent, the inner surface of the softly illuminated bore becomes brightest and darker toward the upper surface on both sides of the bed. If only the region close to the light source 35 is made semi-translucent, the light introduced into the bore from there is reflected by the inner surface of the bore, resulting in a relatively bright inner surface of the bore. In this case, in order to efficiently direct light from the light source 35 toward the semi-translucent member, it is preferable to dispose a reflective member on the side opposite to the inner panel 131 of the light source 35.

  FIG. 11 shows an optical path of light when only a region close to the light source 35 is semi-translucent. Light from the light source 35 is directed to the inner surface of the bore by the reflecting member 70, passes through the inner surface of the translucent bore, and is then irradiated into the bore as diffused light. Of the diffused light, the light that hits the upper part of the inner surface that does not transmit light is reflected there, or repeatedly reflected to illuminate the inside of the bore brightly.

  Also in the present embodiment, it is possible to control the luminance and color of the light source 30 arranged on the front side and the light source 35 arranged in the bore in accordance with the inspection procedure. For example, the light source 35 can constitute the third light source shown in FIG. 8A, and the subject is illuminated by turning on the third light source 30 and making the inside bright before inserting the subject into the bore. Can give you a sense of security. It is also possible to change the emission color in accordance with the insertion of the bed, thereby notifying the operator and the subject of the progress of the examination.

  According to this embodiment, in addition to the light source provided on the front surface side, the light source is disposed inside the panel in the bore, so that the comfort and convenience during the inspection can be further improved.

  ADVANTAGE OF THE INVENTION According to this invention, the medical imaging device which can improve the operativity of the medical imaging device provided with the gantry, especially the operativity at the time of bed apparatus operation is provided.

DESCRIPTION OF SYMBOLS 10 ... Gantry, 11 ... Front surface, 13 ... Inner surface, 15 ... Side surface, 20 ... Imaging unit, 30, 35 ... Light source, 40 ... Bed apparatus, 50 ... Bed connecting part, 60 ... light diffusing member, 70 ... reflecting member, 111 ... center panel, 112 ... front panel, 114 ... lower front panel, 131 ... inner panel, 132. ..Bottom panel, 151... Side panel, 152... Top panel, 153.

Claims (13)

A medical imaging apparatus comprising: an imaging unit; and a gantry that houses the imaging unit and has a bore into which a subject is inserted,
At least a part of the front surface of the gantry and the side surface exterior to the front surface is made of a semi-translucent member, and the shape of the boundary region between the front surface and the side surface made of the semi-translucent member is the light from the light source. The medical imaging apparatus is characterized in that a light source is disposed on the inner side of the exterior. The medical imaging apparatus according to claim 1,
The medical imaging apparatus according to claim 1, wherein the light source is a point light source or a linear light source, and is arranged vertically on both sides of the bore entrance. The medical imaging apparatus according to claim 1, further comprising a bed connecting unit to which a bed apparatus on which a subject is placed is connected,
The medical imaging apparatus according to claim 1, wherein a front surface of the gantry is formed of a semi-transparent member in a peripheral portion of the bore entrance and on both sides of the bed connecting portion. The medical imaging apparatus according to claim 3,
A medical imaging apparatus, wherein a light source is disposed inside an exterior located on both sides of a connecting portion of the bed apparatus. The medical imaging apparatus according to claim 1,
The gantry has an inner surface defining an interior space of the bore;
A medical imaging apparatus, wherein at least a part of an exterior constituting the inner surface is made of a semi-translucent member. The medical imaging apparatus according to claim 5, wherein
A part of the exterior made of a semi-translucent member includes a region along both sides of a bed apparatus inserted into the bore, and a light source is disposed inside the region. Imaging device. The medical imaging apparatus according to claim 1,
The medical imaging apparatus, wherein the light source is an LED. The medical imaging apparatus according to claim 1,
The medical imaging apparatus, wherein the light source is a linear light guide member. The medical imaging apparatus according to claim 7 or 8,
A medical imaging apparatus comprising a light diffusing member and / or a light reflecting member in the vicinity of the light source. The medical imaging apparatus according to claim 1,
The medical light-emitting device, wherein the light source includes at least three types of light sources that emit three primary colors, and emits an arbitrary color by combining the three types of light sources. The medical imaging apparatus according to claim 1,
A light source control unit configured to control driving of the light source, wherein the light source control unit controls at least one of luminance, emission color, and on / off of the light source in relation to the operation of the imaging unit. Medical imaging device. The medical imaging apparatus according to claim 1,
The medical imaging apparatus is a magnetic resonance imaging apparatus. The medical imaging apparatus according to claim 1,
The medical imaging apparatus, wherein the imaging unit is covered with a cover having light reflectivity.

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