WO2020129166A1

WO2020129166A1 - Medical image tool and x-ray imaging device

Info

Publication number: WO2020129166A1
Application number: PCT/JP2018/046654
Authority: WO
Inventors: 淳也山本
Original assignee: 株式会社島津製作所
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2020-06-25
Also published as: CN113194832A; JPWO2020129166A1; JP7192880B2; CN113194832B

Abstract

This medical image tool (7) comprises: a tool body part (7a); and an attachment part (7b) that is provided to the tool body part (7a) and detachably attaches the tool body part (7a) to an installation surface (1a, 203a, 303a) of an imaging stage (1), an image receiver (203) or an assisting implement (303). The attachment part (7b) is configured so as to maintain an attached state in which the tool body part (7a) is attached to the installation surface (1a, 203a, 303a) by detachably bonding, suctioning or sliding the end surface (76) on the installation surface (1a, 203a, 303a) side onto the installation surface (1a, 203a, 303a).

Description

Medical imaging device and X-ray imaging apparatus

The present invention relates to a medical image instrument and an X-ray image capturing apparatus, and more particularly to a medical image instrument and an X-ray image capturing apparatus including an instrument body section including a plurality of reference sections that absorb X-rays.

Conventionally, a medical imaging instrument including an instrument main body including a plurality of X-ray absorbing reference portions is known. Such a medical imaging device is disclosed in, for example, Japanese Patent Laid-Open No. 2006-181252.

In the above-mentioned JP 2006-181252A, an X-ray tube, an FPD (Flat Panel Display) that detects X-rays emitted from the X-ray tube, and a C-shaped arm that holds the X-ray tube and the FPD are disclosed. A monitoring board (medical imaging device) used in an X-ray imaging system provided therein is disclosed. The monitoring plate of JP 2006-181252 A is fixed to a C-shaped arm that holds an X-ray tube and an FPD (Flat Panel Display) that detects X-rays emitted from the X-ray tube. The monitoring board disclosed in JP-A-2006-181252 is provided with three markers imaged by a CCD (Charge Coupled Device) camera.

The monitoring board disclosed in Japanese Patent Laid-Open No. 2006-181252 is used in an X-ray image system to acquire the three-dimensional position of the X-ray tube and FPD based on the images of three markers imaged by a CCD camera. Has been. The three-dimensional positions of the X-ray tube and the FPD are acquired in order to perform image processing such as a tomographic image (tomosynthesis image) of an arbitrary position of the subject based on a plurality of X-ray images of the subject. There is.

As described above, the X-ray imaging system using the monitoring plate disclosed in JP 2006-181252 A requires a dedicated CCD camera to acquire the three-dimensional positions of the X-ray tube and FPD.

Therefore, conventionally, in order to obtain the three-dimensional position of the X-ray tube and the FPD based on the X-ray image taken by the X-ray tube and the FPD included in a general X-ray imaging apparatus, the X-ray tube is used. Phantoms have been proposed that include multiple fiducials that absorb rays. Such a phantom is disclosed in, for example, a non-patent document (Shimadzu Corporation, “Development of new technology for obtaining tomosynthesis images regardless of X-ray imaging device <URL:https://www.shimadzu.co.jp/ news/press/n00kbc000000dzil.html>").

The above non-patent document discloses an X-ray imaging apparatus that uses a phantom to generate a tomographic image based on a plurality of X-ray imaging images. The X-ray imaging apparatus is a state in which the phantom of the above-mentioned non-patent document is placed in the vicinity of the imaging region (region of interest) of the subject, and the X-ray tube is arranged while the placement position of the X-ray tube and the X-ray irradiation angle are changed by the operator. It is configured to take a picture. In addition, the X-ray imaging apparatus generates a tomographic image (tomosynthesis image) based on the reference position information of the phantom of the above-mentioned non-patent document that captures a plurality of X-ray captured images in each X-ray image. Is configured to. As a result, even when the X-ray imaging apparatus is configured as a general X-ray imaging apparatus (when a precise mechanical control mechanism is not mounted as compared with a dedicated tomosynthesis imaging apparatus), the non-patent document described above is used. The phantom acquires a tomosynthesis image having a spatial resolution equivalent to that of a dedicated tomosynthesis imaging device.

Here, the phantom of the above non-patent document is placed at a position near the subject on the imaging table when the subject is imaged in the supine position by the X-ray imaging apparatus. In addition, the phantom of the non-patent document is fixed to a plate member that is held by a pair of metal fittings that are fixed to the upper end and the lower end of the receiver when the subject is imaged in a standing position.

JP, 2006-181252, A

However, the phantom of the above non-patent document is placed at a position near the subject when the subject is imaged in the lying position, and thus it is required that the phantom not easily move due to contact with the subject. Further, the phantom of the above non-patent document, when the subject is photographed in a standing position, a pair of metal fittings are fixed to each of the upper end portion and the lower end portion of the image receiver, and the plate member is fixed to the pair of metal fittings. It is required that the phantom can be easily attached to the receiver by a simple work without requiring a complicated work such as fixing the phantom. For these reasons, in the phantom of the above non-patent document, it is desired that the subject be easily installed in a state in which the movement is restricted regardless of whether the subject is imaged in the lying position or the standing position.

The present invention has been made to solve the above problems, and an object of the present invention is to simply move a subject in a state in which movement is restricted regardless of whether the subject is photographed in a lying position or a standing position. A medical imaging instrument and an X-ray imaging apparatus that can be easily installed by various operations.

In order to achieve the above object, the medical image instrument according to the first aspect of the present invention is provided with an instrument main body including a plurality of reference portions that absorb X-rays, the instrument main body, and an imaging stand and a receiver. Alternatively, each of the installation surfaces of the auxiliary equipment is provided with a mounting portion for removably mounting the instrument main body portion, and the mounting portion is configured such that the end surface on the mounting surface side can be removably adhered to the mounting surface, by suction, or by sliding movement. It is configured to hold the attachment state of the instrument body to the installation surface. In addition, an auxiliary tool refers to a device that supports or fixes the posture of the subject in the lying position, the imaging region of the subject, or the standing posture of the subject when an X-ray image of the subject is taken. It is a broad concept.

In the medical imaging device according to the first aspect of the present invention, as described above, the mounting portion is attached to the installation surface by attaching the end surface on the installation surface side, adsorbing, and slidingly moving the device body to the installation surface. Is configured to hold. Thereby, in the case where the subject is in the supine position, when the medical imaging device is installed on the installation surface of each of the imaging table, the image receiver or the auxiliary tool, even if the medical imaging device and the subject come into contact with each other, The movement of the medical imaging device can be suppressed. Further, when the subject is standing, even if the installation surface of each of the imaging stand, the image receiver, and the auxiliary tool is tilted, the end surface of the installation surface side of the installation portion is bonded, sucked, and slid to the installation surface. Only then, the medical imaging device can be directly installed on the installation surface of each of the imaging stand, the receiver and the auxiliary equipment. As a result, the medical imaging device can be easily installed by a simple operation in a state in which the movement is restricted, regardless of whether the subject is imaged in the lying position or the standing position.

In the medical imaging device according to the first aspect, preferably, the device body is provided on a portion opposite to the installation surface side of the attachment portion, and the attachment portion is used when attaching the device body portion to the installation surface. While maintaining the height position of the instrument body with respect to the installation surface, keep the attachment state of the instrument body to the installation surface by adhering the end face of the installation surface to the installation surface, by suction, or by sliding. Is configured. According to this structure, the height positions of the plurality of reference portions in the instrument body can be held at a fixed position before and after the attachment portion is attached to the installation surface. When the height position of another device is acquired using the height position, the height position of the other device can be accurately acquired.

In this case, preferably, the mounting portion includes a suction portion that is sucked onto the installation surface and is removable while holding the height position with respect to the installation surface of the instrument body portion, and the suction portion is held at the height position. And an inner peripheral portion that is provided inside the outer peripheral portion and is elastically deformable. According to this structure, the medical image device can be attracted to the installation surface by the elastic deformation of the inner part, and even if the inner part is elastically deformed by holding the height position of the outer peripheral part, the device main body The height position of the part with respect to the installation surface can be maintained. Thus, regardless of whether the subject is imaged in the lying position or the standing position, the medical imaging device can be easily installed by a simpler operation while the movement is restricted by the simple configuration. In addition, the medical imaging device can be detached from the installation surface by releasing the adsorption on the installation surface by the adsorption unit, so use the metal fittings fixed to each of the imaging stand, the image receiver, and the auxiliary equipment. Compared with the case where the medical imaging device is detached from the installation surface, the medical imaging device can be easily detached from the installation surface.

In the medical imaging device including the suction unit, preferably, the mounting unit includes a movable body that moves in a first direction from the installation surface toward the device main body while maintaining the height position of the device main body. The suction portion forms a sealed space between the suction surface and the installation surface, and the inner portion moves in the first direction as the movable body moves in the first direction while maintaining the height position of the instrument body. It is configured such that the apparatus main body portion is put in the attached state by being moved and adsorbed to the installation surface by expanding the sealed space. According to this structure, the suction unit can be sucked onto the installation surface only by moving the moving body so as to expand the sealed space between the suction unit and the installation surface. Further, even if the moving body is moved in the first direction and the suction portion is sucked onto the installation surface, the height position of the instrument body with respect to the installation surface can be maintained. As a result, regardless of whether the subject is imaged in the lying position or the standing position, the medical imaging device can be easily installed by a simpler operation with the movement restricted by the simpler configuration.

In the medical imaging device including the moving body, preferably, the device body portion includes a housing portion that houses the moving body in a movable state in a first direction and a second direction opposite to the first direction, The suction part moves the inner part in the first direction along with the movement of the moving body in the first direction to expand the sealed space to put the instrument body in the attached state and to move the moving body in the second direction. The inner part is moved in the second direction in accordance with the movement of (1) to reduce the space in the hermetically closed state, thereby releasing the attached state of the instrument main body. According to this structure, the suction space can be sucked onto the installation surface by setting the negative pressure in the sealed space by the movement of the movable body in the first direction in the housing portion. In addition, the suction unit can be removed from the installation surface by returning the pressure of the hermetically sealed space from the negative pressure to the atmospheric pressure by moving the movable body in the storage unit in the second direction. As a result, the medical imaging device can be easily detached from the installation surface regardless of whether the subject is imaged in the lying position or the standing position.

In the medical imaging device including a moving body that moves in the first direction or the second direction, preferably, the device body is configured to be rotatable about a rotation axis extending in the first direction, and the moving body includes: Rotation of the instrument body in one direction causes movement in the first direction, and rotation of the instrument body in the other direction causes movement in the second direction. According to this structure, the suction portion can be sucked on the installation surface by rotating the instrument body in one direction, and the suction portion can be removed from the installation surface by rotating the instrument body in the other direction. It is possible to easily attach and detach the medical imaging device from the installation surface regardless of whether the subject is imaged in the lying position or the standing position.

The medical image instrument in which the instrument body rotates is preferably further provided with a mark portion that indicates the direction and degree of rotation of the instrument body. According to this structure, since the user can be notified of the degree of rotation of the medical imaging device for attachment and detachment, it is possible to prevent the user from excessively rotating the device main body.

In the medical imaging device including a moving body that moves in the first direction or the second direction, preferably, the moving body has a groove portion formed on an outer side surface in a direction orthogonal to the first direction and is inserted into the groove portion. And further includes an insertion part that restricts the movement of the moving body in the first direction or the second direction by contacting the pair of side surfaces of the groove portion that face each other. According to this structure, it is possible to prevent the inside of the suction unit from being pulled up by a certain amount or more by the moving body and prevent the suction unit from being separated from the moving unit, and the moving body is pulled down by a certain amount or more from the accommodation unit. It can be prevented from coming off.

In the medical imaging device including the moving body that moves in the first direction or the second direction, preferably, the housing portion is brought into contact with the end surface of the moving body in the first direction to move in the first direction of the moving body. Has a top surface arranged at a position that regulates the movement of the. According to this structure, it is possible to reliably prevent the moving body from pulling up the inner portion of the suction portion by a certain amount or more, and thus it is possible to reliably prevent the suction portion from coming off the moving body.

In the medical image instrument in which the instrument body rotates, preferably, the instrument body is fixedly arranged between the instrument body and the suction section in a state independent of the rotation of the instrument body, and the installation surface of the suction section is provided. Further includes a pressing portion that abuts on the opposite end surface. According to this structure, even when the inner portion is elastically deformed when adsorbed to the installation surface, the height position of the outer peripheral portion can be reliably held by the pressing portion.

In this case, preferably, a strap is further provided to prevent the medical imaging device from falling down on the projection provided on the imaging table, the image receiver or the auxiliary tool. According to this structure, even if the medical imaging device is removed from the installation surface of the imaging stand, the image receiver, or the auxiliary tool, it is possible to prevent the medical imaging device from dropping from the installation surface to the floor surface.

An X-ray image capturing apparatus according to a second aspect of the present invention includes an X-ray source, an imaging table including a mounting surface on which a subject is mounted, and a detector that detects X-rays emitted from the X-ray source. A medical imaging device installed on the mounting surface of the imaging table at a position adjacent to the subject, the medical imaging device including a device main body part including a plurality of reference parts that absorb X-rays, The mounting body is provided on the equipment main body, and includes a mounting portion for removably mounting the equipment main body on the mounting surface as the mounting surface of the imaging table. The mounting portion enables the end surface on the mounting surface side to be mounted on the mounting surface. The attachment state of the instrument body to the mounting surface is maintained by adhesion, suction and slide movement.

In the medical imaging device according to the second aspect of the present invention, as described above, the attachment part is attached to the mounting face by the end face of the mounting face side, and the suction and the sliding movement are performed to the mounting face of the device main body. It is configured to hold the attached state. Thereby, in the case where the subject is in the supine position, when the medical imaging device is installed at a position near the subject on the mounting surface of the imaging table, even if the medical imaging device and the subject come into contact with each other, The movement of the medical imaging device can be suppressed. In addition, when the subject is upright, even if the mounting surface of the imaging table is tilted, the mounting surface of the mounting portion is simply attached to the mounting surface, and the end surface of the mounting surface is attached, sucked, and slid to move the mounting surface of the imaging table. A medical imaging device can be installed on the surface. As a result, the medical imaging device can be easily installed by a simple operation in a state in which the movement is restricted, regardless of whether the subject is imaged in the lying position or the standing position. Further, when a plurality of X-ray images are acquired by the X-ray source and the detector and image processing is performed on each of the acquired plurality of X-ray images, movement of the medical imaging device can be suppressed. Even if the medical imaging device and the subject come into contact with each other, image processing can be continuously performed on each of the plurality of acquired X-ray images.

According to the present invention, as described above, regardless of whether the subject is photographed in the lying position or the standing position, the medical image device and the X for medical imaging which can be easily installed by a simple operation in a state where the movement is restricted. Line image capturing device.

FIG. 1 is a schematic diagram showing an overall configuration of an X-ray image capturing apparatus according to a first embodiment. FIG. 3 is a perspective view showing a subject and a phantom on a mounting surface of an imaging table in the X-ray imaging apparatus according to the first embodiment. 3 is a plan view of the phantom according to the first embodiment. FIG. It is a front view of the phantom by a 1st embodiment. FIG. 3 is a side view of the phantom according to the first embodiment. FIG. 11 is a sectional view taken along the line 110-110 in FIG. 4 showing a normal state (released state) of the phantom on the mounting surface according to the first embodiment. FIG. 11 is a cross-sectional view taken along line 110-110 of FIG. 4 showing a mounting state of the phantom on the mounting surface according to the first embodiment. FIG. 100 is a cross-sectional view taken along the line 100-100 of FIG. 3. It is a side view of the attachment part of the phantom by 1st Embodiment. FIG. 3 is a perspective view of a suction portion of the phantom according to the first embodiment. 3 is a perspective view of a moving body of the phantom according to the first embodiment. FIG. It is a front view of a sticker stuck on a phantom by a 1st embodiment. 3 is a rear view of the phantom according to the first embodiment. FIG. It is a schematic diagram which showed the whole structure of the X-ray imaging device by 2nd Embodiment. FIG. 11 is a perspective view showing a state in which a phantom in the X-ray image capturing apparatus according to the second embodiment is installed on the surface of a receiver. FIG. 14 is a perspective view showing a state in which a phantom in the X-ray image capturing apparatus according to the modified examples of the first and second embodiments is installed on the surface of the auxiliary tool.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
An X-ray image capturing apparatus 10 including a phantom 7 used when capturing an X-ray image will be described with reference to FIGS. 1 to 13. The phantom 7 is an example of the "medical image device" in the claims.

(Structure of X-ray imaging apparatus)
As shown in FIG. 1, the X-ray image capturing apparatus 10 irradiates the subject T in the lying position lying on the imaging table 1 and the phantom 7 with X-rays, and detects the X-rays transmitted through the subject T. It is configured to image the subject T and the phantom 7. The X-ray image radiographing apparatus 10 includes a radiographing table 1, an X-ray source 2, a detector 3, a radiographing system position changing mechanism 4, a radiographing apparatus controller 5, a medical X-ray image processing apparatus 6, and the phantom. 7 and 7.

The imaging table 1 includes a mounting surface 1a on which the subject T is mounted. Here, the mounting surface 1a is a flat surface extending in a direction along the horizontal direction. The X-ray source 2 is configured to irradiate the detector 3 with X-rays generated by applying a high voltage. The mounting surface 1a is an example of the "installation surface" in the claims.

The detector 3 is configured to detect X-rays emitted from the X-ray source 2. The X-ray source 2 is configured to detect X-rays, convert the detected X-rays into an electric signal, and read the converted electric signal as an image signal. The detector 3 is, for example, an FPD (Flat Panel Detector). The detector 3 is configured to output the acquired image signal to the medical X-ray image processing apparatus 6.

The imaging system position changing mechanism 4 is configured to change the relative position between the X-ray source 2 and the detector 3 and the angle of the X-ray source 2 based on a signal from the imaging device control unit 5. The imaging system position changing mechanism 4 includes an X-ray source holding unit 4a that rotatably holds the X-ray source 2. The imaging system position changing mechanism 4 also includes an X-ray source moving unit 4b that moves the X-ray source holding unit 4a in the X direction.

The imaging device control unit 5 is configured to perform X-ray imaging by irradiating the detector 3 with X-rays from the X-ray source 2.

The medical X-ray image processing device 6 is configured to generate an X-ray image based on the image signal output from the detector 3. Further, the medical X-ray image processing apparatus 6 is configured to acquire the position information of the plurality of markers MK (see FIG. 3) of the phantom 7 captured in the plurality of X-ray images. Further, the medical X-ray image processing apparatus 6 performs image processing including generation of a reconstructed image in which a plurality of X-ray images are reconstructed into one image based on the position information of the plurality of markers MK of the phantom 7. Is configured. Here, the image processing is not only processing for acquiring a tomographic image of an arbitrary position of the subject T, but also acquisition of positions of devices such as the X-ray source 2 and the detector 3 and X-ray image capturing conditions ( It is a broad concept including standardization of X-ray dose at the time of photographing for each device) and calibration of X-ray images such as noise reduction and image quality improvement. The plurality of markers MK are examples of the "plurality of reference portions" in the claims.

(phantom)
As shown in FIG. 2, the phantom 7 is installed on the placement surface 1 a of the subject T of the imaging table 1 at a position (near position) adjacent to the region of interest A of the subject T. The phantom 7 is installed in a fixed position in the vicinity of the subject T on the mounting surface 1a of the imaging table 1. Note that the position fixing means that the phantom 7 mounted on the mounting surface 1a is installed on the mounting surface 1a without being separated from a predetermined position on the mounting surface 1a by an external force less than a certain value, Is a concept showing a state in which the mounting surface 1a is mounted so as to be separated from a predetermined position by the external force.

Here, a direction in which the mounting surface 1a and the phantom 7 are adjacent to each other is defined as a Z direction, a direction from the installation surface to the phantom 7 in the Z direction is defined as a Z1 direction, and a direction from the phantom 7 to the mounting surface 1a in the Z direction is defined. The direction is the Z2 direction. The Z1 direction is an example of the "first direction" in the claims. The Z2 direction is an example of the "second direction" in the claims.

Phantom 7 has a columnar shape extending in the Z direction. That is, the phantom 7 has a circular shape (see FIG. 3) when viewed from the Z1 direction. Further, the phantom 7 has a rectangular shape (see FIG. 4) when viewed from a direction orthogonal to the Z direction. As shown in FIG. 3, a plurality of markers MK are arranged inside the phantom 7. Each of the plurality of markers MK is made of a material (gold, lead, tungsten, iron, copper, or the like) having a smaller X-ray absorption coefficient than resin. As a result, when the phantom 7 is photographed, the X-rays are absorbed by each of the plurality of markers MK, so that each of the plurality of markers MK can be detected in the X-ray image.

As shown in FIGS. 4 and 5, the phantom 7 includes a phantom body portion 7a, a mounting portion 7b, an insertion bolt 7c, a holding portion 7d, a mark portion 7e, and a strap 7f. The phantom body 7a is an example of the "apparatus body" in the claims. The insertion bolt 7c is an example of the "insertion portion" in the claims.

As shown in FIGS. 6 and 7, the phantom 7 of the present embodiment has a normal state (released state) in which the position is not fixed (movement restricted) at a predetermined position D1 on the mounting surface 1a, and the mounting surface 1a. It has a switching mechanism 17 for switching between a state (attachment state) in which the position is fixed (movement restricted) at a predetermined position D1 above. That is, the phantom 7 is detachably attached to the mounting surface 1 a by the switching mechanism 17 without using any member other than the phantom 7. Here, the switching mechanism 17 has the phantom body portion 7a and the mounting portion 7b.

As shown in FIG. 6, the switching mechanism 17 is configured to put the phantom 7 at a predetermined position D1 on the mounting surface 1a into a normal state (released state) in which the position is not fixed (movement restricted). That is, the phantom 7 is switched by the switching mechanism 17 from the predetermined position D1 on the mounting surface 1a to the movable state. Further, as shown in FIG. 7, the switching mechanism 17 is configured to attach the phantom 7 to a predetermined position D1 on the mounting surface 1a in a state where the position is fixed (movement is restricted) (attached state). In other words, the phantom 7 is switched by the switching mechanism 17 to the attached state in which the phantom 7 is positionally fixed (movement restricted) at the predetermined position D1 on the mounting surface 1a.

The configuration of each switching mechanism 17 of the phantom 7 will be described below.

(Phantom body)
As shown in FIG. 8, the phantom body 7a is configured to move by a user operation for moving the switching mechanism 17. Specifically, the phantom body 7a is configured to be rotatable about a rotation axis Ax extending in the Z1 direction. That is, the phantom body portion 7a is configured to rotate in the mounting direction R1 and to rotate in the release direction R2 by a user operation. The mounting direction R1 is an example of "one direction of the instrument main body" in the claims. Further, the releasing direction R2 is an example of "another direction of the instrument body portion" in the claims.

As shown in FIG. 7, the phantom body portion 7a is configured to reciprocate in the Z direction a movable body 78 of the mounting portion 7b, which will be described later, by rotating about a rotation axis Ax extending in the Z1 direction. Here, the phantom body portion 7a is provided on a portion of the mounting portion 7b opposite to the mounting surface 1a side. That is, the phantom body portion 7a is attached to the moving body 78 of the attaching portion 7b. Specifically, the phantom body portion 7 a has a housing recess 70 and an internal thread 70 a formed in the housing recess 70. The accommodation recess 70 is an example of the "accommodation portion" in the claims.

As shown in FIG. 8, the accommodation recess 70 is configured to accommodate the moving body 78 (see FIG. 9) so as to be movable in the Z1 direction and the Z2 direction. That is, the housing recess 70 has a shape and size (size) corresponding to the moving body 78.

Specifically, the housing recess 70 has a recessed shape in which the end of the phantom body 7a on the Z2 direction side is recessed. The housing recess 70 is arranged in the central portion in the direction orthogonal to the Z direction. Further, the housing recess 70 has a substantially circular shape (see FIG. 3) corresponding to the moving body 78 when viewed from the Z1 direction. As shown in FIG. 6, the accommodation recess 70 has an inner diameter (inner diameter) slightly larger than that of the moving body 78 in the direction orthogonal to the Z direction. The accommodating recess 70 has a length L1 that forms a space M between the accommodating recess 70 and the moving body 78 arranged in the normal state (released state) in the Z direction. That is, in the normal state (released state), a space M is provided between the top surface 70b of the housing recess 70 on the Z1 direction side and the end surface 78h of the moving body 78 on the Z1 direction side.

The female screw portion 70a of the accommodation recess 70 is formed on the inner peripheral surface 70c of the accommodation recess 70 around the rotation axis Ax extending in the Z1 direction. The female screw portion 70a of the housing recess 70 is formed at least in the Z2 direction from the central position of the housing recess 70 in the Z direction. The female screw portion 70 a of the accommodation recess 70 is screwed into the moving body 78. The female screw portion 70a of the accommodating recess 70 has a spiral groove matching the pitch Pt1 of the male screw portion 78a of the moving body 78 described later. The interval D1 between the troughs of the groove of the female screw portion 70a of the accommodation recess 70 is substantially the same as the pitch Pt1 of the male screw portion 78a of the moving body 78. In the cross section of the phantom 7 along the Z direction, the range in the Z direction in which the female screw portion 70a of the accommodation recess 70 is formed is larger than the range in the Z direction in which the male screw portion 78a of the moving body 78 is formed.

As shown in FIG. 7, the accommodating recess 70 is configured to limit the moving range of the moving body 78 in the Z1 direction. Specifically, the housing recess 70 has the top surface 70b arranged at a position that restricts the movement of the moving body 78 in the Z1 direction by contacting the end surface 78h of the moving body 78 on the Z1 direction side. ing. That is, the top surface 70b is a stopper of the moving body 78 that moves in the Z1 direction. The arrangement position R of the top surface 70b is a position separated from the end of the accommodation recess 70 on the Z2 direction side by the length L1 in the Z1 direction side. That is, the arrangement position R of the top surface 70b is a position where the top surface 70b and the end surface 78h of the moving body 78 on the Z1 side contact each other when the moving body 78 moves in the Z1 direction by the distance M. Here, the interval M (see FIG. 6) is larger than the pitch Pt1 of the male screw portion 78a of the moving body 78 and smaller than the length obtained by adding all the pitches Pt1 of the male screw portion 78a of the moving body 78.

An insertion hole 71 is formed in the phantom body 7a for inserting the insertion bolt 7c. The insertion hole 71 penetrates from the outer peripheral surface Sr of the phantom body 7a in the direction orthogonal to the Z direction to the accommodation recess 70 in the cross section along the Z direction. The insertion hole 71 is provided with a storage portion 71a in which the head portion of the insertion bolt 7c is stored and a female screw portion 71b into which the male screw portion of the insertion bolt 7c is screwed.

As shown in FIG. 8, the phantom body portion 7a has a first lid portion 73, a second lid portion 74, and a marker placement portion 75. The phantom body 7a includes the plurality of markers MK that absorb X-rays. Here, the plurality of markers MK are arranged in the marker arrangement unit 75. The marker placement portion 75 is formed with a plurality of recesses 72 that accommodate a plurality of markers MK. The plurality of recesses 72 has a first recess group 72a formed on the Z1 direction side of the phantom body 7a and a second recess group 72b formed on the Z2 direction side of the phantom body 7a.

The first recess group 72a is configured such that the end surface on the Z1 direction side of the marker placement section 75 is recessed in the Z2 direction. Each of the second recessed portion groups 72b has the Z2 direction side end surface of the marker placement portion 75 recessed in the Z1 direction. Here, the first recess group 72a is arranged at substantially the same position in the Z direction. The second recessed portion groups 72b are arranged at substantially the same positions in the Z direction.

The first lid 73 closes the first recess group 72a from the Z1 direction side. The second lid portion 74 closes the second recess group 72b from the Z2 direction side. Here, the second lid portion 74 is formed with a hole 74a for allowing the moving body 78 to pass therethrough. The hole 74a of the second lid portion 74 is formed to be sufficiently larger than the moving body 78 in the direction orthogonal to the Z direction.

The first lid portion 73, the second lid portion 74, and the marker placement portion 75 other than the plurality of markers MK of the phantom body portion 7a are each made of resin in order to transmit the X-rays emitted from the X-ray source 2. Has been formed.

(Mounting part)
As shown in FIGS. 6 and 7, the mounting portion 7b is configured to move along with the rotation of the phantom body portion 7a by a user operation for moving the switching mechanism 17. Here, the mounting portion 7b has a structure for converting the rotation of the phantom body portion 7a into the linear movement of the moving body 78 in the Z direction. The attachment portion 7b is provided on the phantom body portion 7a, and is configured to detachably attach the phantom body portion 7a to the mounting surface 1a of the imaging table 1.

Specifically, the mounting portion 7b is configured to hold the mounting state of the phantom body portion 7a on the mounting surface 1a by adsorbing the end surface 76 on the mounting surface 1a side to the mounting surface 1a. There is. The mounting portion 7b is configured to release the attachment state of the phantom body 7a to the mounting surface 1a by releasing the suction of the end surface 76 on the mounting surface 1a side to the mounting surface 1a. There is.

Here, when attaching the phantom main body 7a to the mounting surface 1a, the mounting portion 7b holds the end surface 76 on the mounting surface 1a side while maintaining the height position H1 of the phantom main body 7a with respect to the mounting surface 1a. It is configured to hold the attachment state of the phantom body portion 7a to the mounting surface 1a by suction. That is, the phantom 7 suppresses the change in the height position H1 from the mounting surface 1a to the end surface 73a on the Z1 direction side of the phantom body 7a before and after mounting to the mounting surface 1a by the mounting portion 7b. It is configured.

Specifically, as shown in FIG. 9, the mounting portion 7b has a suction portion 77 and a moving body 78. Here, in the mounting portion 7b, the suction portion 77 and the moving body 78 are fixed to each other in order to move a part of the suction portion 77 integrally with the movement of the moving body 78.

<Suction part>
The suction portion 77 is configured to suck onto the mounting surface 1a while maintaining the height position H1 of the phantom body portion 7a with respect to the mounting surface 1a (the size of the phantom 7 in the Z direction (see FIG. 7)). Has been done. That is, as shown in FIG. 10, the suction portion 77 has a structure that suppresses a change in the height position H1 of the phantom body portion 7a with respect to the mounting surface 1a before and after mounting to the mounting surface 1a by the mounting portion 7b. It is a sucker. Specifically, the suction portion 77 has a male screw portion 77a and a suction cup body portion 77b.

As shown in FIG. 6, the male screw portion 77 a of the suction portion 77 is configured to fix the suction portion 77 to the moving body 78. The male screw portion 77a of the suction portion 77 projects in the Z1 direction from the central portion of the suction cup body portion 77b in the direction orthogonal to the Z direction. The male screw portion 77a of the suction portion 77 is configured to be screwed into a female screw portion 178a of the moving body 78 described later. The male screw portion 77a of the suction portion 77 is configured by the pitch Pt2 (see FIG. 7). The pitch Pt2 (see FIG. 7) of the male screw portion 77a of the suction portion 77 is smaller than the pitch Pt1 of the male screw portion 78a of the moving body 78. In the cross section of the phantom 7 along the Z direction, the range of the male screw portion 77a of the suction portion 77 in the Z direction is smaller than the range of the moving body 78 in the Z direction in which the female screw portion 178a is formed.

As shown in FIGS. 6 and 7, the suction cup body 77b moves the moving body 78 so that the height of the suction portion 77 from the mounting surface 1a is the height H2 and the height H3 (H2<H3). ), and is configured to change. Specifically, the suction cup body 77b has an outer peripheral portion 77c that holds the height position H4 and an elastically deformable inner portion 77d that is provided inside the outer peripheral portion 77c. Here, the maximum thickness t2 in the Z direction of the inner portion 77d of the suction cup body 77b is smaller than the thickness t1 of the outer peripheral portion 77c in the Z direction.

The sucker body 77b and the male screw 77a are made of resin so as to transmit the X-rays emitted from the X-ray source 2. The suction cup body portion 77b and the male screw portion 77a are integrally provided.

<Mobile unit>
The moving body 78 is configured to move in the Z1 direction while holding the height position H1 of the phantom body 7a. Further, the moving body 78 is configured to move in the Z2 direction while holding the height position H1 of the phantom body 7a. That is, the moving body 78 is configured to move in the Z1 direction or the Z2 direction in accordance with the suction of the mounting surface 1a by the phantom main body 7a and the release of the suction of the mounting surface 1a by the phantom main body 7a. Specifically, the moving body 78 is configured to move in the Z1 direction when the phantom body 7a rotates in the mounting direction R1 and to move in the Z2 direction when the phantom body 7a rotates in the release direction R2. There is.

Here, as shown in FIGS. 6 and 11, the moving body 78 has a substantially circular shape corresponding to the accommodation recess 70 when viewed from the Z1 direction side. In the direction orthogonal to the Z direction, the maximum diameter of the moving body 78 is smaller than the maximum diameter of the housing recess 70. The moving body 78 includes a first enlarged diameter portion 78b, a second enlarged diameter portion 78c, and a reduced diameter portion (constricted portion) 78d provided between the first enlarged diameter portion 78b and the second enlarged diameter portion 78c. Have

As shown in FIG. 6, the first expanded diameter portion 78b is arranged at the end of the moving body 78 on the Z1 direction side. In the direction orthogonal to the Z direction, the diameter of the first expanded diameter portion 78b is larger than the diameter of the reduced diameter portion 78d. In the Z direction, the length of the first expanded diameter portion 78b is smaller than the length of the second expanded diameter portion 78c.

The second expanded diameter portion 78c is arranged on the Z2 direction side of the first expanded diameter portion 78b of the moving body 78. In the direction orthogonal to the Z direction, the diameter of the second expanded diameter portion 78c is larger than the diameter of the reduced diameter portion 78d. The second expanded diameter portion 78c includes a male screw portion 78a that is screwed into the female screw portion 70a of the accommodation recess 70, a female screw portion 178a that is screwed into the male screw portion 77a of the sucker body 77b, and a male screw portion 77a of the sucker body 77b. And a bonding portion 78e that is bonded to the head of the.

The male screw portion 78a of the second expanded diameter portion 78c is formed on the outer surface 78g around the rotation axis Ax extending in the Z1 direction of the second expanded diameter portion 78c. The male screw portion 78a of the second expanded diameter portion 78c is formed at least on the Z2 direction side in the Z direction with respect to the central portion of the second expanded diameter portion 78c. Here, in the second expanded diameter portion 78c, the portion on the Z1 direction side of the male screw portion 78a in the Z direction is formed by a flat surface. The male screw portion 78a of the second expanded diameter portion 78c has a pitch Pt1 that is screwed into the female screw portion 70a of the housing recess 70.

The female screw portion 178a of the second expanded diameter portion 78c is formed in a recess 178b recessed in the Z1 direction from the end of the second expanded diameter portion 78c on the Z2 direction side. The female screw portion 178a of the second expanded diameter portion 78c is screwed to the male screw portion 77a of the suction portion 77. The interval D2 between the troughs of the groove of the female screw portion 178a of the second expanded diameter portion 78c is substantially the same as the pitch Pt2 (see FIG. 7) of the male screw portion 77a of the suction portion 77.

As shown in FIG. 6, the adhesive portion 78e is formed on the Z2 direction side of the male screw portion 78a of the second expanded diameter portion 78c. An end surface of the adhesive portion 78e on the Z2 direction side (see FIG. 11) is adhered to a surface of the head of the male screw portion 77a of the suction portion 77 on the Z1 direction side (see FIG. 10). Although not shown, the end surface of the adhesive portion 78e on the Z2 direction side and the surface of the head portion of the male screw portion 77a of the suction portion 77 on the Z1 direction side are rough surfaces having fine protrusions, respectively. In this way, the moving body 78 and the suction portion 77 are firmly fixed by the screw fixing, the adhesive and the frictional force between the rough surfaces.

The reduced diameter portion 78d connects the first enlarged diameter portion 78b and the second enlarged diameter portion 78c in the Z direction. In the direction orthogonal to the Z direction, the diameter of the reduced diameter portion 78d is smaller than the diameter of the first enlarged diameter portion 78b and the second enlarged diameter portion 78c. Here, in the moving body 78, the surface 178c on the Z2 direction side of the first expanded diameter portion 78b, the surface 178d on the Z1 direction side of the second expanded diameter portion 78c, and the outer peripheral surface of the reduced diameter portion 78d form the groove portion 78f. Are formed. That is, the groove portion 78f is formed on the outer side surface 78g of the moving body 78 orthogonal to the Z1 direction. The groove portion 78f is recessed toward the center of the moving body 78 in the direction orthogonal to the Z direction. The groove portion 78f communicates with the insertion hole 71 of the phantom body portion 7a in both the normal state (released state) and the attached state.

(Expansion and reduction of space)
As shown in FIG. 7, the suction portion 77 uses the pressure difference between the negative pressure space S between the mounting surface 1a and the positive pressure outside the suction portion 77 to cause the suction surface of the mounting surface 1a to be a suction cup body. It is configured to adsorb with 77b. That is, the suction portion 77 forms a negative pressure space S between the mounting surface 1a and the outer peripheral portion 77c of the suction cup body 77b and the mounting surface 1a by the positive pressure outside the suction portion 77. Is configured to let.

Specifically, the suction part 77 forms a sealed space S between itself and the mounting surface 1a. In the suction portion 77, the inner portion 77d is moved in the Z1 direction as the moving body 78 moves in the Z1 direction while the height position H1 of the phantom main body portion 7a is held, so that the sealed space S is expanded. By doing so, it is adsorbed to the mounting surface 1a. As a result, the suction portion 77 is configured to put the phantom body portion 7a in the attached state. Here, in the closed space S, there is a difference between the height position H3 of the suction portion 77 in the attached state and the height position H2 of the suction portion 77 in the normal state (released state) (see FIG. 6). The pressure is reduced by the corresponding increase in volume.

As described above, when the phantom main body 7a is put in the attached state, in the phantom 7, the user rotates the phantom main body 7a in the attaching direction R1 and the male screw portion of the moving body 78 is moved along the female screw portion 70a of the accommodation recess 70. 78a moves. Here, since the outer peripheral portion 77c of the suction cup body portion 77b is in a state of being prevented from rotating, as the male screw portion 78a of the moving body 78 moves in the Z1 direction, the inner portion 77d of the suction cup body portion 77b also moves in the Z1 direction. Moving. As a result, in the phantom 7, a negative pressure space S is formed between the suction portion 77 and the mounting surface 1a.

As shown in FIG. 6, the suction portion 77 reduces the pressure difference between the negative pressure space S between the mounting surface 1a and the positive pressure outside the suction portion 77, thereby sucking the suction surface to the mounting surface 1a. It is configured to release the suction of the main body 77b. In other words, the suction portion 77 reduces the negative pressure space S between the suction surface 77 and the mounting surface 1a, so that the outer peripheral portion 77c of the suction cup body 77b and the mounting surface 1a adhere to each other by a positive pressure outside the suction portion 77. Is configured to be released.

Specifically, the suction portion 77 moves in the Z2 direction of the moving body 78 in a state in which the space S formed between the mounting surface 1a and the sealed surface S is held at the height position H1 of the phantom body portion 7a. The inner part 77d is moved in the Z2 direction in accordance with the movement of (1), and the space S in the sealed state is reduced, thereby releasing the suction of the mounting surface 1a, and thus the phantom body 7a is brought to the normal state (released state). Is configured to. Here, in the sealed space S, there is a difference between the height position H3 (see FIG. 7) of the suction portion 77 in the attached state and the height position H2 of the suction portion 77 in the normal state (released state). The pressure increases by the corresponding decrease in volume.

As described above, when the phantom main body 7a is in the normal state (released state), in the phantom 7, the female screw portion 70a of the accommodation recess 70 is operated by the user's operation of rotating the phantom main body 7a in the releasing direction R2 (see FIG. 7). The male screw portion 78a of the moving body 78 moves along the. Here, since the outer peripheral portion 77c of the suction cup body portion 77b is in a rotation-stopped state, as the male screw portion 78a of the moving body 78 moves in the Z2 direction, the inner portion 77d of the suction cup body portion 77b also moves in the Z2 direction. Moving. As a result, in the phantom 7, the negative pressure space S formed between the suction portion 77 and the installation surface is reduced.

Thus, as shown in FIGS. 6 and 7, in the suction portion 77, the inner portion 77d is moved in the Z1 direction with the movement of the moving body 78 in the Z1 direction to expand the space S in the sealed state. The phantom body 7a is placed in the attached state, and the inner portion 77d is moved in the Z2 direction in accordance with the movement of the moving body 78 in the Z2 direction to reduce the space S in the sealed state. It is configured to release.

(Insert bolt)
The insertion bolt 7c is configured to be inserted into the groove portion 78f and contact the pair of

surfaces

178c and 178d of the groove portion 78f that face each other to restrict the movement of the moving body 78 in the Z1 direction or the Z2 direction. .. That is, when the moving body 78 moves in the Z1 direction, the moving body 78 moves in the Z1 direction by contacting the Z2 direction side surface 178d of the groove 78f (the Z1 direction side surface of the second expanded diameter portion 78c). Movement is restricted. In addition, when the moving body 78 moves in the Z2 direction, the moving body 78 is brought into contact with the Z1 direction side surface 178c (the Z2 direction side surface of the first expanded diameter portion 78b) to move the moving body 78 in the Z2 direction. Movement is restricted.

The insertion bolt 7c serves as a stopper when the inner portion 77d of the suction cup body 77b is pulled up or down by a certain amount in the Z1 direction. Here, the respective moving ranges of the moving body 78 in the Z1 direction and the Z2 direction can be adjusted by the length of the reduced diameter portion 78d in the Z direction. The insertion bolt 7c is a resin bolt that transmits the X-rays emitted from the X-ray source 2.

As described above, the phantom 7 does not apply an excessive load to the connecting portion between the suction portion 77 and the moving body 78 due to the movement of the moving body 78 in the Z1 direction. The surface 70b and the insertion bolt 7c are provided.

(Holding part)
The pressing portion 7d is fixedly disposed between the phantom body portion 7a and the suction portion 77 in a state independent of the rotation of the phantom body portion 7a, and the end surface 76a of the suction portion 77 opposite to the mounting surface 1a. Is configured to abut. That is, the pressing portion 7d prevents the outer peripheral portion 77c of the suction cup body portion 77b from being separated from the mounting surface 1a when the phantom body portion 7a is mounted by the user's operation of rotating the phantom body portion 7a in the mounting direction R1. Holding down.

Thus, the pressing portion 7d is configured to maintain the contact state between the outer peripheral portion 77c of the suction cup body portion 77b and the mounting surface 1a even when the inner portion 77d of the suction cup body portion 77b moves in the Z1 direction. Has been done. Here, a hole 172 for passing the moving body 78 is formed in the pressing portion 7d. The hole 172 of the pressing portion 7d is formed to be sufficiently larger than the moving body 78 in the direction orthogonal to the Z direction.

Also, the pressing portion 7d is formed with a pair of through holes 171 through which the strap 7f is passed. The pair of through holes 171 extend in a direction orthogonal to the Z direction. Further, the pair of through holes 171 penetrate the side surface of the pressing portion 7d.

(Mark part)
As shown in FIGS. 12 and 13, the mark portion 7e is configured to indicate the rotation direction and the degree of rotation of the phantom body portion 7a. That is, the mark portion 7e is configured to easily notify the user of the usage method and usage status of the phantom 7. Specifically, the mark portion 7e is provided on the seal 79 indicating the rotation direction of the phantom body portion 7a and the suction cup body portion 77b, and when used together with the seal 79, the degree of rotation of the phantom body portion 7a can be determined. And a notch 177 shown.

The seal 79 has an arrow 79a described as "LOCK" at the end in the mounting direction R1 and "FREE" at the end in the release direction R2. In the mark portion 7e, the degree of rotation of the phantom body portion 7a depends on the distance that the end portion of the seal 79 on the mounting direction R1 side of the arrow 79a moves with respect to the central portion of the notch 177 in the direction orthogonal to the Z direction. Shown.

(strap)
As shown in FIG. 2, the strap 7f is configured to prevent the phantom 7 from falling down to the protruding portion 7g provided on the imaging table 1. The strap 7f is inserted into the pair of through holes 171 (see FIG. 13) of the holding portion 7d of the phantom 7, and is connected to one end and the other end to form a loop. As described above, by hanging the annular strap 7f on the projecting portion 7g, it is possible to prevent the phantom 7 from falling from the imaging table 1.

(Phantom installation method)
A method of installing the phantom 7 on the mounting surface 1a of the imaging table 1 will be described below with reference to FIGS. 2, 6, and 7.

First, as shown in FIG. 2, the user attaches the strap 7f to the protrusion 7g provided on the photographing table 1. The user mounts the phantom 7 at a predetermined position D1 near the subject T on the mounting surface 1a. As shown in FIG. 7, the user rotates the phantom body 7a of the phantom 7 in the mounting direction R1 without excessively pressing the phantom body 7a in the Z2 direction. By these operations, the installation of the phantom 7 by the user at the predetermined position D1 on the mounting surface 1a is completed.

Further, when removing the phantom 7 from the mounting surface 1a, as shown in FIG. 6, the phantom body 7a of the phantom 7 is released in the releasing direction R2 without the user excessively pressing the phantom body 7a in the Z2 direction. Rotate to. By this operation, the removal of the phantom 7 by the user from the predetermined position D1 on the mounting surface 1a is completed.

(Effects of the first embodiment)
The following effects can be obtained in the first embodiment of the present invention.

In the first embodiment, as described above, the mounting portion 7b holds the mounting state of the phantom main body portion 7a on the mounting surface 1a by causing the mounting surface 1a to adsorb the end surface 76 on the mounting surface 1a side. To configure. Accordingly, when the subject T is in the lying position, the movement of the phantom 7 is suppressed even when the phantom 7 and the subject T contact each other when the phantom 7 is installed on the mounting surface 1a of the imaging table 1. be able to. Further, the phantom 7 can be directly installed on the mounting surface 1a of the imaging table 1 only by adsorbing the end surface 76 of the mounting portion 1b on the mounting surface 1a side to the mounting surface 1a. As a result, when the subject T is imaged in the lying position, the phantom 7 can be easily installed by a simple operation with the movement restricted.

Further, in the first embodiment, as described above, the phantom main body portion 7a is attached to the portion of the attachment portion 7b opposite to the mounting surface 1a side. When the mounting portion 7b is attached to the mounting surface 1a of the phantom body portion 7a, the end surface 76 on the mounting surface 1a side is placed on the mounting surface 1a while maintaining the height position H1 of the phantom body portion 7a with respect to the mounting surface 1a. The phantom body 7a is configured to be held on the mounting surface 1a by being sucked onto the mounting surface 1a. Thereby, the height positions of the plurality of markers MK in the phantom body 7a can be held at a fixed position before and after the attachment portion 7b is attached to the mounting surface 1a, and thus the plurality of markers in the phantom body 7a can be maintained at a fixed position. When the height position of the other device is obtained using the height position of the marker MK, the height position of the other device can be obtained accurately.

Further, in the first embodiment, as described above, the attachment portion 7b is attached to the mounting surface 1a while being held at the height position H1 of the phantom body portion 7a with respect to the mounting surface 1a, and is removable. The part 77 is provided. The suction portion 77 is provided with an outer peripheral portion 77c that holds the height position H4 and an elastically deformable inner portion 77d that is provided inside the outer peripheral portion 77c. As a result, the phantom 7 can be attracted to the mounting surface 1a by the elastic deformation of the inner portion 77d, and even if the inner portion 77d is elastically deformed by holding the height position H4 of the outer peripheral portion 77c, the phantom body can be elastically deformed. The height position H1 of the portion 7a with respect to the mounting surface 1a can be held. As a result, when the subject T is imaged in the supine position, the phantom 7 can be easily installed by a simpler operation with the movement restricted by the simple configuration. Moreover, since the phantom 7 can be detached from the mounting surface 1a by releasing the suction of the suction portion 77 on the mounting surface 1a, the phantom mounted using the metal fitting fixed to the imaging table can be mounted. It is possible to easily attach and detach the phantom 7 to and from the mounting surface 1a, as compared with the case of attaching and detaching from the surface.

Further, in the first embodiment, as described above, in the state in which the suction portion 77 forms the closed space S between the mounting surface 1a and the height position H1 of the phantom body portion 7a, With the movement of the moving body 78 in the Z1 direction, the inner portion 77d is moved in the Z1 direction, and the space S in the sealed state is expanded to attract the mounting surface 1a so that the phantom body 7a is attached. To configure. Thereby, the suction portion 77 can be sucked onto the mounting surface 1a only by moving the moving body 78 so as to expand the sealed space S between the suction portion 77 and the mounting surface 1a. Further, even if the moving body 78 is moved in the Z1 direction and the suction portion 77 is sucked onto the mounting surface 1a, the height position H1 of the phantom body portion 7a with respect to the mounting surface 1a can be held. As a result, when the subject T is imaged in the lying position, the phantom 7 can be easily installed by a simpler operation with the movement restricted by the simpler configuration.

In addition, in the first embodiment, as described above, the suction part 77 is configured such that the inner part 77d is moved in the Z1 direction in accordance with the movement of the moving body 78 in the Z1 direction to expand the sealed space S and thereby the phantom. The main body portion 7a is placed in the attached state, and the inner portion 77d is moved in the Z2 direction along with the movement of the moving body 78 in the Z2 direction to reduce the sealed space S to release the attached state of the phantom main body portion 7a. To configure. As a result, the suction space 77 can be sucked onto the mounting surface 1a by causing the space S in the sealed state to have a negative pressure by the movement of the moving body 78 in the accommodation recess 70 in the Z1 direction. Further, the suction space 77 can be removed from the mounting surface 1a by returning the closed space S from the negative pressure to the atmospheric pressure by the movement of the movable body 78 in the accommodation recess 70 in the Z2 direction. As a result, when the subject T is imaged in the lying position, the phantom 7 can be easily attached to and detached from the mounting surface 1a.

Further, in the first embodiment, as described above, the phantom body 7a is configured to be rotatable about the rotation axis Ax extending in the Z1 direction. The moving body 78 is configured to move in the Z1 direction when the phantom body portion 7a rotates in the mounting direction R1 and to move in the Z2 direction when the phantom body portion 7a rotates in the release direction R2. As a result, the suction portion 77 can be sucked onto the mounting surface 1a by rotating the phantom body portion 7a in the mounting direction R1, and the suction portion 77 can be rotated by rotating the phantom body portion 7a in the releasing direction R2. The phantom 7 can be detached from the mounting surface 1a more easily when the subject T is imaged in the lying position.

Further, in the first embodiment, as described above, the phantom 7 is provided with the mark portion 7e indicating the rotation direction and the degree of rotation of the phantom main body portion 7a. This allows the user to be notified of the degree of rotation of the phantom 7 for attachment/detachment, which can prevent the user from excessively rotating the phantom body 7a.

In the first embodiment, as described above, the phantom 7 is brought into contact with the pair of

surfaces

178c and 178d of the groove 78f that face each other, thereby restricting the movement of the moving body 78 in the Z1 direction or the Z2 direction. An insertion bolt 7c is provided. As a result, it is possible to prevent the inner portion 77d of the suction portion 77 from being pulled up by a certain amount or more by the moving body 78 and to prevent the suction portion 77 from coming off the moving body 78, and the moving body 78 is pulled down by a certain amount or more and accommodated. It is possible to prevent the recess 70 from coming off.

In addition, in the first embodiment, as described above, the housing recess 70 is arranged at a position that restricts the movement of the moving body 78 in the Z1 direction by contacting the end surface 78h of the moving body 78 on the Z1 direction side. A top surface 70b is provided. Accordingly, it is possible to reliably prevent the moving body 78 from pulling up the inner portion 77d of the suction portion 77 by a certain amount or more, and thus it is possible to reliably prevent the suction portion 77 from coming off the moving body 78.

Further, in the first embodiment, as described above, the phantom 7 is fixedly arranged between the phantom body 7a and the suction portion 77 in a state independent of the rotation of the phantom body 7a, and the suction portion 77 is provided. A pressing portion 7d that abuts on the end surface 76a opposite to the mounting surface 1a is provided. Accordingly, even when the inner portion 77d is elastically deformed when adsorbed to the mounting surface 1a, the height position H4 of the outer peripheral portion 77c can be reliably held by the pressing portion 7d.

Also, in the first embodiment, as described above, the phantom 7 is provided with the strap 7f for preventing the phantom 7 from falling down over the protruding portion 7g provided on the imaging table 1. As a result, even if the phantom 7 is removed from the mounting surface 1a of the imaging table 1, it is possible to prevent the phantom 7 from falling from the mounting surface 1a to the floor surface.

Further, in the first embodiment, as described above, when a plurality of X-ray images are acquired by the X-ray source 2 and the detector 3 and image processing is performed on each of the acquired plurality of X-ray images, Since the movement of the phantom 7 can be suppressed, even if the phantom 7 and the subject T come into contact with each other, image processing can be continuously performed on each of the plurality of acquired X-ray images.

Also, in the first embodiment, as described above, the strap 7f is attached to the phantom 7 by passing it through the pair of through holes 171 provided in the holding portion 7d. As a result, by attaching the strap 7f to the pressing portion 7d arranged independently of the rotation of the phantom body 7a, the strap 7f does not rotate together with the rotation of the phantom body 7a. It is possible to attach/detach the phantom 7 to/from the mounting surface 1a of the imaging table 1 without worrying about it.

[Second Embodiment]
Next, with reference to FIG. 14 and FIG. 15, the configuration of the X-ray imaging apparatus 210 according to the second embodiment of the present invention will be described. In the second embodiment, unlike the first embodiment, an example in which the phantom 7 is installed in the X-ray imaging apparatus 210, not on the imaging table 1 but on the surface 203a on the subject T side of the image receiver 203, will be described. .. In addition, in the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 14, the X-ray imaging apparatus 210 irradiates the subject T (standing subject T) standing in front of the image receiver 203 and the phantom 7 with X-rays and transmits the subject T. The object T and the phantom 7 are imaged by detecting X-rays. The X-ray image capturing apparatus 210 includes an X-ray source 2, an image receiver 203, an image capturing system position changing mechanism 4, an image capturing apparatus control unit 5, a medical X-ray image processing apparatus 6, and a phantom 7. ..

As shown in FIG. 15, the surface 203a of the image receiver 203 on the subject T side is a substantially vertical plane along a direction orthogonal to the horizontal direction. The image receiver 203 is used when imaging the standing subject T. The phantom 7 of the second embodiment is installed in a state (attachment state) that is fixed (movement restricted) at a predetermined position D2 on the vertical surface 203a of the image receiver 203 on the subject T side. Further, at this time, the phantom 7 is configured to be switchable from a predetermined position D2 of the vertical surface 203a on the subject T side of the image receiver 203 to a normal state (released state) in which the position is not fixed (movement restricted). ing. The rest of the configuration of the second embodiment is similar to that of the first embodiment.

(Effects of Second Embodiment)
In the second embodiment, the following effects can be obtained.

In the second embodiment, as described above, the attachment state of the phantom main body portion 7a to the surface 203a of the image receiver 203 is made by adsorbing the end surface 76 on the surface 203a side of the attachment portion 7b to the surface 203a of the image receiver 203. Is configured to hold. Accordingly, when the subject T is standing, the movement of the phantom 7 can be suppressed even if the phantom 7 and the subject T contact each other when the phantom 7 is installed on the surface 203a of the image receiver 203. it can. Further, the phantom 7 can be installed on the surface 203a of the image receiver 203 by simply adsorbing the end surface 76 of the attachment portion 7b on the mounting surface 1a side to the mounting surface 1a. As a result, when the subject T is imaged in the upright position, the phantom 7 can be directly installed easily by a simple operation with the movement restricted.

Further, in the second embodiment, as described above, in the case where the surface 203a of the image receiver 203 on the subject T side is a plane in a substantially vertical direction, the image receiving device 203 does not need to be fixed to the image receiving device 203 by a dedicated fixing member. Since it is possible to install the phantom 7 on the surface 203a of the above, it is possible to suppress the narrowing of the irradiation field in the image receiver that can be irradiated with X-rays. Further, in the case where the surface 203a of the receiver 203 on the subject T side is a plane in a substantially vertical direction, the phantom 7 can be installed on the surface 203a of the receiver 203 without fixing a dedicated fixing member to the receiver 203. Since this is possible, it is not necessary to attach a dedicated fixing member to the image receiver 203, and the phantom 7 can be easily attached and detached.

In addition, in the second embodiment, as described above, when the subject T is in the standing position, even if the surface 203a of the image receiver 203 is tilted, the image receiver 203 can be mounted without using a dedicated fixing member. The phantom 7 can be installed on the surface 1a. The other effects of the second embodiment are similar to those of the first embodiment.

[Modification]
It should be understood that the embodiments disclosed this time are exemplifications in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of the claims, and further includes meanings equivalent to the scope of the claims and all modifications (modifications) within the scope.

For example, in the first and second embodiments described above, the mounting portion 7b holds the mounting state of the phantom main body portion 7a by adsorbing the end surface 76 on the mounting surface 1a side to the mounting surface 1a (installation surface). Although an example is shown, the present invention is not limited to this. According to the present invention, the mounting portion is provided at the end portion on the installation surface side, and the end surface on the installation surface side is adhered to the installation surface by the adhesive tape that can be detached a plurality of times, and the mounting state of the instrument main body portion is maintained. Alternatively, the instrument body may be attached to the receiving surface provided on the installation surface by sliding the end face on the installation surface side and fitting the end surface on the installation surface to hold the attachment state of the instrument body.

In addition, in the above-described first and second embodiments, an example in which the insertion bolt 7c (insertion portion) is inserted into the groove portion 78f of the moving body 78 has been shown, but the present invention is not limited to this. In the present invention, the insertion portion may be a member such as a rod other than the bolt.

Further, in the first embodiment, an example in which the phantom 7 is installed on the mounting surface 1a (installation surface) on the imaging table 1 on which the subject T is mounted is shown, and in the second embodiment, the surface of the image receiver 203. Although an example in which the phantom 7 is installed on the installation surface 203a has been shown, the present invention is not limited to this. In the present invention, the phantom 7 may be installed with the surface 303a of the auxiliary tool 303 for fixing the posture of the hand part, which is the imaging site of the subject T, as the modification example shown in FIG. As another aspect, as an auxiliary tool, a cushion that supports the subject T in the lying position, a support member that supports the subject T in the standing position, or a foot that is the imaging site of the subject T is supported. The phantom 7 may be installed with the surface of the table or the like as the installation surface.

Further, in the first and second embodiments, the phantom 7 (medical image device) is mounted by the suction part 77 by the rotation of the phantom body 7a (device body) in the mounting direction R1 (one direction). An example in which the surface 1a (installation surface) is configured to be sucked has been shown, but the present invention is not limited to this. In the present invention, in the medical imaging device, the installation surface may be sucked by the suction portion by pulling the moving body in the first direction by the lever, or a structure for pulling the moving body in the first direction by the switch is provided. Therefore, the installation surface may be adsorbed by the adsorption unit.

In the above-described first and second embodiments, the phantom 7 (medical image device) includes the pressing portion 7d, but the present invention is not limited to this. In the present invention, the medical imaging device may not include the pressing portion.

In the above first and second embodiments, the mark portion 7e is configured by the seal 79 and the notch 177 so as to indicate the rotation direction and the degree of rotation of the phantom body portion 7a (apparatus body portion). However, the present invention is not limited to this. The mark portion may be configured to indicate the rotation direction and the degree of rotation of the instrument body portion by an arrow provided on the seal and a scale provided on the phantom body portion.

Further, in the above-described first and second embodiments, the example in which the strap 7f is provided on the holding portion 7d has been shown, but the present invention is not limited to this. In the present invention, the strap may be provided on the instrument body or may not be provided.

In the first embodiment, the mounting surface 1a (installation surface) of the imaging table 1 is a flat surface extending in the horizontal direction, but the present invention is not limited to this. In the present invention, the installation surface of the imaging table may be an inclined surface that is inclined with respect to the horizontal direction.

In the first and second embodiments, an example is shown in which the accommodation recess 70 (accommodation portion) is formed in the phantom body portion 7a (apparatus body portion), but the present invention is not limited to this. In the present invention, the instrument body may be provided with a through hole as a housing.

In the first and second embodiments, the phantom 7 (medical image device) is provided with the mark portion 7e, but the present invention is not limited to this. In the present invention, the medical imaging device may not include the marking portion.

In the first and second embodiments, in the phantom 7 (medical image device), not only the insertion bolt 7c (insertion portion) is inserted into the groove 78f, but also the top surface 70b of the accommodation recess 70 (accommodation portion). The example in which the movement of the moving body 78 in the Z1 direction is restricted by the contact of the end surface 78h on the Z1 direction side (first direction) of the moving body 78 has been shown, but the present invention is not limited to this. In the present invention, there is no structure that restricts the movement of the moving body in the first direction by the end surface of the moving body in the first direction coming into contact with the top surface of the accommodating portion as long as the insertion portion is inserted in the groove portion. Good.

1 Shooting table 1a Mounting surface (installation surface)
2 X-ray source 3 Detector 7 Phantom (medical imaging device)
7a Phantom body (apparatus body)
7b Mounting part 7c Insertion bolt (insertion part)

7d Pressing part

7e Marking part 7f Strap

7g Projection part

10, 210 X-ray imaging device 70 Storage recess (storage part)
70b Top surface 76 End surface (on mounting surface side) (End surface on installation surface side)
76a End surface (on the side opposite to the mounting surface of the suction portion) (End surface on the side opposite to the mounting surface of the suction portion)
77 Adsorption part 77c Peripheral part 77d Inner part 78 Moving body 78f Groove part 78h (Z1 direction side of moving body) End surface (end surface of moving body in first direction side)
178c, 178d Pair of side surfaces 203 Image receivers 203a, 303a Surface (installation surface)
303 Auxiliary tool Ax Rotation axis H1 Height position MK marker (reference part)
R1 mounting direction (One-way rotation of the instrument body)
R2 release direction (rotation of the instrument body in the other direction)
S space

Claims

An instrument body including a plurality of reference portions that absorb X-rays;
Provided on the instrument body, and provided with a mounting portion for detachably attaching the instrument body to the installation surface of each of the imaging stand, the image receiver or the auxiliary tool,
The attachment portion is configured to hold the attachment state of the instrument body portion to the installation surface by either detachably adhering the installation surface side end surface to the installation surface, by suction or by sliding movement. Is a medical imaging device.
The instrument main body portion is provided on a portion opposite to the installation surface side of the attachment portion,
The mounting portion, when mounting the instrument body to the installation surface, while maintaining the height position of the instrument body with respect to the installation surface, the end surface of the installation surface side adheres to the installation surface, adsorption and The medical imaging device according to claim 1, wherein the device is configured to hold the mounting state of the device main body on the installation surface by any of the slide movements.
The mounting portion includes a suction portion that is suckable and removable with respect to the installation surface while holding the height position with respect to the installation surface of the instrument body.
The medical imaging device according to claim 2, wherein the suction portion has an outer peripheral portion that holds the height position and an elastically deformable inner portion that is provided inside the outer peripheral portion.
The mounting portion includes a moving body that moves in a first direction from the installation surface toward the instrument body portion while holding the height position of the instrument body portion,
The suction unit forms a sealed space between the suction unit and the installation surface, and in the state where the height position of the instrument main body is held, the suction unit is moved along with the movement of the moving body in the first direction. The inner part is moved in the first direction and the space in the closed state is expanded to be sucked to the installation surface, whereby the instrument main body part is brought into the attached state. The medical imaging device according to item 3.
The instrument body includes a storage portion that stores the movable body in a state of being movable in the first direction and a second direction opposite to the first direction,
The suction section causes the instrument main body section to be in the attached state by expanding the space in the sealed state by moving the inner section in the first direction as the moving body moves in the first direction. Along with the movement of the moving body in the second direction, the inner portion is moved in the second direction to reduce the space in the sealed state, thereby releasing the attached state of the instrument body. The medical imaging device of claim 4, wherein the medical imaging device is configured.
The instrument body is configured to be rotatable about a rotation axis extending in the first direction,
The moving body is configured to move in the first direction by rotating the instrument body in one direction, and move in the second direction by rotating the instrument body in the other direction. Item 5. The medical imaging device according to item 5.
The medical image device according to claim 6, further comprising a mark portion that indicates a rotation direction and a degree of rotation of the device body.
The moving body has a groove portion formed on an outer surface in a direction orthogonal to the first direction,
The insertion part that is inserted into the groove part and that restricts movement of the moving body in the first direction or the second direction by contacting a pair of side surfaces of the groove part that face each other, further comprising: 7. The medical imaging device according to any one of 7 above.
6. The housing according to claim 5, wherein the housing portion has a top surface arranged at a position that restricts movement of the moving body in the first direction by contacting an end surface of the moving body on the first direction side. The medical imaging device according to any one of 8 above.
A pressing portion that is fixedly arranged between the instrument body portion and the suction portion in a state independent of the rotation of the instrument body portion and that abuts an end surface of the suction portion opposite to the installation surface. The medical imaging instrument according to claim 6 or 7, comprising.
10. The medical imaging device according to claim 9, further comprising a strap for preventing the medical imaging device from falling down on a projection provided on the imaging stand, the image receiver, or the auxiliary tool.
X-ray source,
An imaging table including a mounting surface on which the subject is mounted,
A detector for detecting X-rays emitted from the X-ray source,
On the mounting surface of the imaging table, comprising a medical imaging device installed in a position adjacent to the subject,
The medical imaging device,
An instrument body including a plurality of reference portions that absorb X-rays;
A mounting portion which is provided on the instrument main body and detachably attaches the instrument main body to the mounting surface as the installation surface of the imaging table;
The mounting portion is such that the end surface on the mounting surface side can be removably attached to the mounting surface so as to hold the mounting state of the instrument body portion on the mounting surface by any one of adhesion, suction and sliding movement. An X-ray imaging apparatus configured.