WO2021124612A1 - Dispositif de fixation de sujet pour radiographie à rayons x et système de radiographie à rayons x - Google Patents

Dispositif de fixation de sujet pour radiographie à rayons x et système de radiographie à rayons x Download PDF

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Publication number
WO2021124612A1
WO2021124612A1 PCT/JP2020/031260 JP2020031260W WO2021124612A1 WO 2021124612 A1 WO2021124612 A1 WO 2021124612A1 JP 2020031260 W JP2020031260 W JP 2020031260W WO 2021124612 A1 WO2021124612 A1 WO 2021124612A1
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WIPO (PCT)
Prior art keywords
subject
ray
interest
fixture
frame body
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PCT/JP2020/031260
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English (en)
Japanese (ja)
Inventor
淳也 山本
Original Assignee
株式会社島津製作所
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Priority to JP2021565329A priority Critical patent/JP7310923B2/ja
Publication of WO2021124612A1 publication Critical patent/WO2021124612A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like

Definitions

  • the present invention relates to an X-ray imaging subject fixture that fixes the position of a subject to be X-ray imaging, and an X-ray imaging system including the X-ray imaging subject fixture.
  • the position of the subject is fixed while the subject is being irradiated with X-rays. If the position of the subject is not sufficiently fixed, blurring or artifacts caused by the body movement of the subject occur in the X-ray image, and the accuracy of the diagnosis by the X-ray image is greatly reduced.
  • fixtures for fixing the subject in order to prevent the subject from moving.
  • a method of mounting a weight member such as a gizzard on a predetermined part of a subject, or a flexible cushioning material is brought into contact with a predetermined part of a subject, and the weight member is further attached to the cushioning material.
  • a method of mounting there is a method of mounting.
  • a fastening fixture such as a tape or a band (for example, Patent Document 1).
  • a negative pressure type fixing tool is arranged around a predetermined part of the subject, and the inside of the negative pressure type fixing tool is made negative pressure by using a suction pump or the like to specify the negative pressure type fixing tool.
  • Examples thereof include a method of restraining the predetermined part by solidifying the shape according to the part.
  • the fastening fixture since the predetermined part of the subject is directly pressed by the fastening fixture, the pain of the subject increases. Since the fixture according to the second conventional example is often used for a long-time examination such as bone density measurement, the pain of the subject becomes even greater due to the prolonged X-ray imaging. Further, since the part that can be fixed by the fastening fixture is limited to a specific part such as the foot, the versatility is low.
  • the negative pressure type fixture and suction pump according to the third conventional example are large devices and require time and effort to operate. Therefore, in the third conventional example, the burden on the operator who uses the device is large.
  • the negative pressure type fixture fixes a wide range such as the whole body or half of the subject. That is, the versatility is low because the situations in which the negative pressure type fixture can be applied are limited.
  • the predetermined part of the subject to be fixed is different from the part of interest that is the X-ray imaging target. That is, in order to prevent the weight member or the fastening fixture from affecting the X-ray image, as an example, when performing X-ray photography with the hip joint as the site of interest, the fixture is generally used for the foot. .. As another example, when the elbow part of the subject is photographed, it is common to use a fixture for the hand part. It is difficult to reliably prevent body movement in the important part of interest by the conventional method of fixing a predetermined part different from the part of interest and performing X-ray photography.
  • the present invention has been made in view of such circumstances, and is for X-ray imaging in which the position of the site of interest of the subject can be reliably fixed by a simple configuration without being influenced by the skill of the operator. It is an object of the present invention to provide a subject fixture and an X-ray imaging system.
  • the X-ray imaging subject fixture according to the present invention is an X-ray imaging subject fixture that fixes a part of the subject to be X-ray imaging, and sandwiches a part of the subject.
  • the frame is composed of a pair of frames arranged so as to face each other, a support member for supporting each of the frames so that the positional relationship between the frames is maintained, and a material having X-ray transparency. It is provided with a filling member that is removably filled in the gap between the body and a part of the subject and restrains the part of the subject.
  • the position of the site of interest is performed by a simple operation of inserting a filling member into the gap between the pair of frames arranged so as to face each other with a part of the subject (for example, the site of interest) and the site of interest.
  • a part of the subject can be reliably fixed without being influenced by the skill of the operator.
  • the frame is a member arranged in the vicinity of a part of the subject, the size of the subject fixture for X-ray imaging can be limited to the size of a region in the vicinity of a part of the subject. Therefore, it becomes easy to miniaturize the subject fixture for X-ray imaging.
  • the filling member is made of a material having X-ray transparency, the X that is irradiated to the portion of interest even when the filling member is in contact with the portion of interest and restrains and fixes the portion of interest. It is possible to prevent the wire from being affected by the filling member. Therefore, the site of interest can be directly fixed by using the X-ray imaging subject fixture, and it is possible to avoid a situation in which the diagnostic ability of the X-ray image is deteriorated by the filling member or the like.
  • the filling member is preferably a plate-shaped member configured so that the thickness decreases from one end to the other end.
  • the filling member is configured to become thinner from one end to the other end. Therefore, by inserting the filling member having the same shape as the wedge into the gap, a force acting in the direction of pressing the subject against the frame is generated. As a result, the subject can be fixed more reliably. Further, since the width of the gap can be widened by changing the insertion depth of the filling member, the versatility of the filling member can be improved.
  • At least one of the frames is configured so that the surface facing a part of the subject is inclined with respect to the X-ray irradiation direction.
  • a portion of interest for example, a wrist joint or a hip joint, which is preferably fixed in an inclined state with respect to the X-ray irradiation direction.
  • the posture can be further stabilized while the portion of interest is in an inclined posture. Therefore, it is possible to acquire an X-ray image with less blur or artifacts for the portion of interest in the tilted posture.
  • the frame body is configured to be detachable from the support member.
  • a frame body adapted to a predetermined region of interest is attached to a support member, X-ray photography is performed, and then the frame body is supported.
  • X-ray imaging can be performed by removing it from the member and attaching a frame body adapted to another part of interest to the support member. That is, it is possible to realize an X-ray imaging subject fixture capable of appropriately fixing each region of interest for X-ray imaging of a plurality of regions of interest without using a plurality of support members. Further, by removing the frame body from the support member, the storage space for the object fixture for X-ray imaging can be reduced.
  • the present invention may have the following configuration. That is, the X-ray imaging system according to the present invention includes an X-ray tube that irradiates a subject with X-rays, an X-ray detector that detects X-rays that are irradiated from the X-ray tube and transmitted through the subject. It includes an image generation unit that generates an X-ray image based on a detection signal output by the X-ray detector, and a subject fixture for X-ray imaging according to the present invention described above.
  • a subject fixture for X-ray imaging is provided. Therefore, the position of the portion of interest can be fixed by a simple operation of inserting the filling member into the gap between the frame body that is arranged so as to face the portion of interest and the portion of interest. Therefore, since the region of interest can be reliably fixed without being influenced by the skill of the operator, it is possible to realize an X-ray imaging system that can reliably reduce blurring or artifacts generated in the X-ray image.
  • a filling member is provided for a gap between a pair of frames arranged so as to face each other with a part of the subject in between and the site of interest.
  • the position of a part of the subject can be fixed by a simple operation of inserting. Therefore, a part of the subject can be reliably fixed without being influenced by the skill of the operator.
  • the frame is a member arranged in the vicinity of a part of the subject, the size of the subject fixture for X-ray imaging can be limited to the size of a region in the vicinity of a part of the subject. Therefore, it becomes easy to miniaturize the subject fixture for X-ray imaging.
  • the filling member is made of a material having X-ray transparency, the X that is irradiated to the portion of interest even when the filling member is in contact with the portion of interest and restrains and fixes the portion of interest. It is possible to prevent the wire from being affected by the filling member. Therefore, the site of interest can be directly fixed by using the X-ray imaging subject fixture, and it is possible to avoid a situation in which the diagnostic ability of the X-ray image is deteriorated by the filling member or the like.
  • FIG. 5 is a plan view showing a state in which a portion of interest is placed in a gap between frames in the first embodiment.
  • FIG. 5 is a plan view showing a state in which a filling member is inserted between a portion of interest and a frame in the first embodiment.
  • FIG. 5 is a perspective view explaining the whole structure of the subject fixture for X-ray photography which concerns on Example 2.
  • FIG. FIG. 5 is a plan view showing a state in which a portion of interest is placed in a gap between frames in the first embodiment.
  • FIG. 5 is a plan view showing a state in which a filling member is inserted between a portion of interest and a frame in the first embodiment.
  • FIG. 2 is a perspective view showing a state in which a portion of interest is placed in a gap between frames in the second embodiment.
  • FIG. 2 is a front view showing a state in which a portion of interest is placed in a gap between frames in the second embodiment.
  • FIG. 2 is a front view showing a state in which a filling member is inserted between a portion of interest and a frame in the second embodiment. It is a perspective view explaining the whole structure of the subject fixture for X-ray photography which concerns on Example 3.
  • FIG. It is a top view explaining the structure of the subject fixture for X-ray photography which concerns on Example 3.
  • FIG. FIG. 3 is a front view showing a state in which a filling member is inserted between a portion of interest and a frame in the third embodiment.
  • FIG. 5 is a side view showing a state in which a portion of interest is placed in a gap between frames in the fourth embodiment.
  • FIG. 4 is a front view showing a state in which a filling member is inserted between a portion of interest and a frame in the fourth embodiment.
  • It is a perspective view explaining the structure of the subject fixture for X-ray photography which concerns on a modification.
  • FIG. 1 is a front view showing the overall configuration of the X-ray imaging system 1 including the subject fixture 11 according to the first embodiment.
  • the X-ray imaging system 1 includes a top plate 3, an X-ray tube 5, a collimator 6, an X-ray detector 7, an image generation unit 9, an image display unit 10, and a subject fixture 11. And have.
  • the top plate 3 is placed with the subject M in various postures.
  • the X-ray tube 5 irradiates the subject M with X-rays.
  • the collimator 6 is provided in the X-ray tube 5, and limits the X-rays emitted from the X-ray tube 5 to, for example, a cone having a pyramid shape.
  • the X-ray detector 7 is provided with a detection surface for detecting X-rays, detects X-rays emitted from the X-ray tube 5, and converts them into electrical signals. Pixels, which are X-ray detection elements, are arranged in a two-dimensional matrix on the detection surface of the X-ray detector 7. In the embodiment, a flat panel detector (FPD) is used as the X-ray detector 7.
  • FPD flat panel detector
  • the X-ray tube 5 and the X-ray detector 7 are arranged so as to face each other with the subject M in between.
  • the image generation unit 9 is connected to the X-ray detector 7, and generates an X-ray image by performing various image processing based on the X-ray detection signal output from the X-ray detector 7.
  • the image display unit 10 displays the X-ray image generated by the image generation unit 9.
  • An example of the image display unit 10 is a liquid crystal monitor and the like.
  • the subject fixture 11 fixes the region of interest Ma of the subject M.
  • the site of interest Ma is a portion of the subject M that is the target of X-ray photography.
  • the subject fixture 11 corresponds to the subject fixture for X-ray photography in the present invention.
  • the subject fixture 11 fixes the elbow portion of the subject M as the site of interest Ma.
  • the elbow portion of the subject M corresponds to a part of the subject according to the present invention.
  • the X-ray detector 7 is illustrated below the top plate 3 in FIG. 1, the arrangement of the X-ray detector 7 is not limited to this, and the X-ray detector 7 is a wireless FPD.
  • the line detector 7 may be placed on the top plate 3. In this case, the subject fixture 11 can be further placed on the X-ray detector 7.
  • the subject fixture 11 includes a base portion 13, a frame body 15, and a filling member 17.
  • the base portion 13 is a flat plate-shaped member, and the frame body 15 is arranged on the upper surface of the base portion 13.
  • the frame body 15 is composed of a pair of members.
  • one of the pair of frame bodies 15 is designated as a frame body 15a and the other is designated as a frame body 15b to distinguish between the two.
  • the frame body 15a and the frame body 15b are arranged with a gap 16 open.
  • the gap 16 is configured to have a size such that the site of interest Ma of the subject M can be reliably arranged. That is, the frame body 15a and the frame body 15b are arranged so as to face each other with the interest portion Ma of the subject M in between.
  • Each of the frame bodies 15 is adhesively fixed to the base plate 13 with an adhesive or the like. That is, the base plate 13 supports each of the frame bodies 15 so that the positional relationship between the frame body 15a and the frame body 15b is maintained.
  • Each of the frames 15 is attached with a marker WM suggesting a positional relationship between the site of interest Ma and the site of interest Ma to be arranged. By visually recognizing the marker WM, the operator can quickly grasp the information regarding the region of interest Ma to be fixed by the subject fixture 11 and the information regarding the orientation of the region of interest Ma arranged in the gap 16.
  • Example 1 in which the elbow portion is the region of interest Ma, the surface of the frame body 15a on the side close to the gap portion 16 has a shape along the inside of the elbow portion in which the posture for X-ray photography is taken. In this case, by bringing the elbow portion into contact with the surface close to the gap portion 16, the elbow portion can be stably fixed in a posture for X-ray photography.
  • the filling member 17 fills the space formed between the interest portion Ma arranged in the gap 16 and the frame body 15.
  • Each of the base portion 13, the frame body 15, and the filling member 17 is made of a material having X-ray transparency. Urethane and the like can be mentioned as an example of a material having X-ray transparency.
  • the filling member 17 is one or more members that are plate-shaped as a whole.
  • a preferable configuration of the filling member 17 is a plate-shaped member configured so that the thickness decreases from one end side to the other end side.
  • the filling member 17 includes five types of members having different shapes, that is, filling members 17a to 17e.
  • the number of filling members 17, the number of types, and the thickness may be appropriately changed.
  • the filling members 17a to 17c are plate-shaped members configured so that the thickness decreases from one end side to the other end side. That is, the filling members 17a to 17c have a shape similar to a wedge.
  • the filling member 17a and the filling member 17b are columnar members having a trapezium on the bottom surface, and the filling member 17c is a triangular columnar member.
  • the filling member 17a is a member having a thickness larger than that of the filling member 17b.
  • the filling member 17d and the filling member 17e are plate-shaped members having a uniform thickness.
  • the filling member 17d is a member having a thickness larger than that of the filling member 17e.
  • Each of the filling members 17a to 17e is provided with a marker PM suggesting the shape and size of the member. By visually recognizing the marker PM, the operator can quickly grasp information on the shapes and sizes of the filling members 17a to 17e.
  • FIGS. 2 to 4 A series of operations for fixing the region of interest Ma of the subject M using the subject fixture 11 and further performing X-ray imaging on the subject M will be described with reference to FIGS. 2 to 4.
  • the subject M is made to take a predetermined posture, and the subject M is placed on the top plate 3.
  • the arm portion of the subject M depending on the sitting posture is placed on the top plate 3.
  • the subject fixture 11 is placed on the top plate 3 with the frame body 15 facing upward. At this time, the position of the subject fixture 11 is appropriately adjusted so that the base portion 13 is arranged above or above the X-ray detector 7.
  • the subject fixture 11 in a state where the position of the base portion 13 is adjusted is as shown in FIG.
  • the operator arranges the region of interest Ma of the subject M in the gap 16 formed between the pair of frames 15.
  • the interest portion Ma is arranged in the gap portion 16, it is preferable to arrange the interest portion Ma so as to be in contact with one of the frames 15 as shown in FIG.
  • the posture of the portion of interest Ma is made more stable by bringing the portion of interest Ma into contact with the frame body 15a.
  • the gap 16 is designed to be wide enough to reliably arrange the site of interest Ma. Therefore, in a state where the interest portion Ma of the subject M is arranged in the gap portion 16, a gap Fa is formed between at least one of the frame bodies 15 and the interest portion Ma.
  • the filling member 17 is inserted into the gap Fa between the frame body 15 and the interest portion Ma.
  • the space formed between the frame body 15 and the portion of interest Ma is filled by the filling member 17.
  • the region of interest Ma is in a state of being restrained by the frame body 15 and the filling member 17. That is, the position of the portion of interest Ma can be fixed with high accuracy by a simple operation of inserting the plate-shaped filling member 17.
  • the size of the gap Fa changes according to the physique of the subject M. Therefore, when the gap Fa is filled with the filling member 17, the operator fills the gap Fa according to the size of the gap Fa by appropriately combining the filling members 17a to 17e having different shapes and thicknesses and inserting the gap Fa into the gap Fa. ..
  • the gap Fa becomes small, so the gap Fa is filled by using a filling member 17c or a filling member 17e having a relatively small thickness.
  • the gap Fa becomes large, so that the gap Fa is filled by using a filling member 17a or a filling member 17d having a relatively small thickness.
  • the width of the gap 16 can be accommodated by changing the insertion depth. ..
  • the filling member 17a is used, if the gap Fa is relatively large, the filling member 17a is inserted relatively deeply.
  • a force acting in the direction of pressing the filling member 17 toward the outside is generated. That is, a force acting in the direction of pressing the region of interest Ma against the frame body 15 is generated.
  • the site of interest Ma of the subject M can be more reliably fixed.
  • the filling member 17a is inserted relatively shallowly.
  • the gap Fa is surely filled while avoiding unnecessary pressure on the region of interest Ma. Therefore, the position of the region of interest Ma can be fixed accurately.
  • the frame body 15 and the filling member 17 are made of elastic urethane, it is possible to prevent the subject M from receiving a feeling of oppression even when the region of interest Ma is in a restrained state.
  • X-ray photography is started. That is, the operator irradiates the region of interest Ma with X-rays from the X-ray tube 5 by appropriately operating an input unit (not shown). Since each of the base portion 13, the frame body 15, and the filling member 17 included in the subject fixture 11 is made of a material that is transparent to X-rays, the X-rays that pass through the site of interest Ma are the constituents of the subject fixture 11. It is possible to avoid attenuation by the member.
  • the X-ray that has passed through the region of interest Ma is detected by the X-ray detector 7, and an X-ray image that reflects the region of interest Ma is generated by the image generation unit 9.
  • the generated X-ray image is displayed on the image display unit 10, and the operator takes appropriate measures while visually recognizing the X-ray image. Since the position of the region of interest Ma is accurately fixed by inserting the filling member 17, it is possible to avoid blurring or artifacts in the X-ray image during X-ray imaging.
  • the operator releases the restrained state of the site of interest Ma by pulling out the filling member 17 inserted in the gap Fa. Then, the series of operations is completed by removing the region of interest Ma placed on the base portion 13 from the gap portion 16 and further lowering the subject M from the top plate 3.
  • Example 2 of the present invention will be described.
  • Example 1 the subject fixture 11 used when the elbow is the site of interest Ma has been described, but in Example 2, when the side surface of the wrist joint is the site of interest Ma, it is used to fix the site of interest Ma.
  • the subject fixture 11 to be used will be described.
  • Example 2 the wrist joint of the subject M corresponds to a part of the subject according to the present invention.
  • FIG. 5 is a perspective view showing the subject fixture 11 according to the second embodiment. Since the configuration of the second embodiment and the configuration of the first embodiment are common to the base portion 13 and the filling member 17, the description thereof will be omitted.
  • each of the pair of frame bodies 15a and 15b constituting the frame body 15 is a plate-shaped member.
  • the frames 15a and 15b are erected on the base portion 13 so that they are parallel to each other.
  • the gap 16 is designed to be wide enough to reliably place the hand and wrist portions of the subject M.
  • one frame body 15a is configured to be an inclined surface G whose inner surface is inclined with respect to the z direction. That is, the inner surface of the frame body 15a is configured to be inclined in the side view.
  • the inclined surface G of the frame body 15a is inclined with respect to the direction in which X-rays are irradiated from the X-ray tube 5 (z direction in this embodiment).
  • the arm portion of the subject M is placed on the top plate in a sitting posture. Place it on 3.
  • the subject fixture 11 is placed on the top plate 3 with the frame body 15 facing upward.
  • the operator is interested in the gap 16 formed between the frames 15 as shown in FIG. 7 or 8.
  • the wrist joint part which is the part Ma, is arranged.
  • the back of the hand is placed so as to come into contact with the inclined surface G inside the frame body 15a. Since the inner surface G is inclined with respect to the z direction, all the fingers of the hand can be visually recognized in a plan view by abutting the inclined surface G along the back of the hand.
  • a gap Fa is formed between the frame body 15b and the interest portion Ma.
  • the filling member 17 is inserted into the gap Fa to fill the gap Fa.
  • the portion of interest Ma is in a restrained state and the position is fixed.
  • the filling members 17b, 17c, and 17d are combined to fill the gap Fa.
  • X-ray Px is irradiated from the X-ray tube 5 to the region of interest Ma as shown in FIG. 9, and X-ray imaging is started.
  • the position of the wrist joint portion, which is the portion of interest Ma, is fixed in a state of being inclined with respect to the z direction by the inclined surface G of the frame body 15a and the filling member 17. Therefore, the X-ray Px is incident on the entire surface of the palm. Therefore, in the acquired X-ray image, all the bones constituting the wrist joint are suitably projected without being hidden by other bones.
  • the operator pulls out the filling member 17 inserted in the gap Fa and releases the restrained state of the region of interest Ma. Then, the series of operations is completed by removing the region of interest Ma from the gap 16 and lowering it from the top plate 3.
  • Example 3 of the present invention will be described.
  • the subject fixture 11 used when performing X-ray photography with the side surface of the knee portion as the site of interest Ma will be described.
  • the subject M was X-rayed in the sitting posture, but in Example 3, the subject M in the lying posture was X-rayed.
  • FIG. 10 is a perspective view showing the subject fixture 11 according to the third embodiment.
  • the pair of frame bodies 15a and 15b constituting the frame body 15 are rectangular parallelepiped members extending in the x direction, and are erected on the base portion 13 so as to be parallel to each other.
  • FIG. 10 is a perspective view showing the subject fixture 11 according to the third embodiment.
  • the frame bodies 15a and the frame bodies 15b constituting the pair of frame bodies 15 are arranged so as to open a V-shaped gap portion 16.
  • the knee portion in the recumbent posture is placed in the V-shaped gap portion 16 in a state of being bent at a predetermined angle.
  • one frame body 15a is a member having a substantially triangular columnar shape, and the inner surface has a shape corresponding to the back surface side of the knee portion.
  • the other frame body 15b has a shape in which a V-shaped notch is formed inside a rectangular parallelepiped member.
  • the notch portion has a shape corresponding to the shape of the front side of the knee portion.
  • the knee portion of the subject M corresponds to a part of the subject according to the present invention.
  • the subject M in a lying posture is placed on the top plate 3.
  • the subject fixture 11 is placed on the top plate 3 with the frame body 15 facing upward.
  • the knee portion which is the region of interest Ma of the subject M, is placed in the gap portion 16 in a state of being bent at a predetermined angle. Further, the gap Fa between the portion of interest Ma and the frame 15 is filled with the filling member 17.
  • the posture of the portion of interest Ma is placed in the gap portion 16 with the front side of the portion of interest Ma (knee portion) in contact with the frame body 15b. Is more stable.
  • a gap Fa is formed between the frame body 15a and the portion of interest Ma, and the gap Fa is filled with the filling member 17.
  • the gap Fa between the frame body 15a and the interest portion Ma may be filled with the filling member 17 in a state where the back surface side of the interest portion Ma is in contact with the frame body 15a.
  • X-rays are irradiated from the X-ray tube 5 to start X-ray photography. Since the X-ray is applied to the region of interest Ma from the z direction, an X-ray image obtained by photographing the knee joint or the like from the side surface is acquired.
  • Example 4 of the present invention will be described.
  • the subject fixture 11 used when performing X-ray photography for the purpose of measuring bone density with the hip joint as the site of interest Ma will be described.
  • FIG. 13 is a perspective view showing the subject fixture 11 according to the fourth embodiment. Since the base portion 13 and the filling member 17 are common to other embodiments, the description thereof will be omitted.
  • the frame bodies 15a and the frame bodies 15b constituting the pair of frame bodies 15 are erected on the base portion 13 so as to be parallel to each other.
  • the gap 16 is designed to be wide enough to reliably place the legs of the subject M.
  • the inside of the frame body 15a is an inclined surface G that is inclined with respect to the z direction.
  • the subject fixture 11 according to the fourth embodiment is different from the subject fixture 11 according to another embodiment in that the auxiliary plate 19 is provided.
  • the auxiliary plate 19 is arranged on the upper part of the base portion 13 and is adhesively fixed to the base plate 13.
  • the upper surface of the holding plate 19 is configured to have a shape along the back surface of the leg portion in which the knee joint is bent forward. That is, the auxiliary plate 19 is configured to increase in thickness from the end Te to the top Tp. Therefore, in the fourth embodiment, the floor surface of the gap 16 has a raised shape as a whole.
  • the subject M in the supine position is placed on the top plate 3.
  • the subject fixture 11 is placed on the top plate 3 with the frame body 15 facing upward.
  • the legs and interests of the subject M are in a state where the knee joint is bent at a predetermined angle suitable for bone density measurement.
  • the site Ma (hip joint site) is placed in the gap 16.
  • the display of the frame body 15b is omitted in the side view according to FIG.
  • Example 4 by providing the auxiliary plate 19, the floor surface of the gap portion 16 has a shape of being raised along the back surface of the portion of interest Ma and the leg portion. Therefore, the region of interest Ma is supported by the auxiliary plate 19 in a stable posture together with the legs.
  • the interest portion Ma and the inside of the leg portion are brought into contact with the inclined surface G inside the frame body 15a as shown in FIG. Due to the contact, the knee and the hip joint, which is the site of interest Ma, are stably supported by the frame body 15a in a state of being appropriately internally rotated. That is, the posture of the site of interest Ma can be stabilized while maintaining the internal rotation angle of the site of interest Ma at an angle suitable for measuring the bone density.
  • the site of interest Ma is fixed by filling the gap Fa between the knee and the frame 15b with the filling member 17.
  • the gap Fa is filled by inserting the filling members 17a and 17d.
  • the site of interest Ma and the knee are fixed at an appropriate internal rotation angle.
  • the knee portion of the subject M corresponds to a part of the subject according to the present invention.
  • the subject fixture 11 is a pair of frame bodies 15 having a frame body 15a and a frame body 15b, and a frame body 15a, which are arranged so as to face each other with the region of interest Ma to be X-ray imaged interposed therebetween.
  • the base portion 13 that supports each of the frame bodies 15a and 15b and a material having X-ray transparency are formed so that the positional relationship between the frame body 15b and the frame body 15b is maintained.
  • a filling member 17 that is removably filled in the gap 16 and restrains the region of interest Ma is provided.
  • the position of the interest portion Ma can be fixed by a simple operation of inserting the filling member 17 into the gap portion 16 between the frame body 15 and the interest portion Ma which are arranged so as to face each other with the interest portion Ma in between. Therefore, the site of interest Ma can be reliably fixed without being influenced by the skill of the operator. Further, since the frame body 15 is a member arranged in the vicinity of the region of interest Ma, the size of the subject fixture 11 can be limited to about the size of the region in the vicinity of the region of interest Ma. Therefore, it becomes easy to miniaturize the subject fixture 11 required for fixing the region of interest Ma.
  • the filling member 17 is made of a material having X-ray transparency, even when the filling member 17 is in contact with the region of interest Ma, the X-rays irradiated to the region of interest Ma are the filling member 17. You can avoid being affected by. Therefore, the target portion Ma can be directly fixed by using the subject fixing tool 11, and it is possible to prevent the diagnostic ability of the X-ray image from being lowered by the filling member 17 or the like.
  • the subject fixture 11 capable of corresponding to various regions of interest Ma Is realized. That is, unlike the conventional configuration in which the portion of interest that can be fixed is limited, the subject fixture 11 according to the present embodiment is greatly improved in versatility.
  • the filling members 17a to 17c of the filling members 17 are plate-shaped members configured so that the thickness decreases from one end to the other end.
  • At least one of the frames 15a and 15b is configured such that the surface G facing the region of interest Ma is inclined with respect to the irradiation direction of the X-ray Px.
  • the portion of interest Ma is a portion that is preferably fixed in an inclined state with respect to the X-ray irradiation direction, for example, a wrist joint or a hip joint
  • the interest is along the inclined surface G.
  • the posture can be further stabilized while the region of interest Ma is in an inclined posture. Therefore, it is possible to acquire an X-ray image with less blur or artifacts for the region of interest Ma in the tilted posture.
  • the frame body 15 is configured to be detachable from the base portion 13.
  • the frame body 15 adapted to the predetermined region of interest Ma is attached to the base portion 13 and X-ray photography is performed
  • the frame body 15 is removed from the base portion 13 and further adapted to another region of interest Ma.
  • the frame body 15 can be attached to the base portion 13 to perform X-ray photography. That is, it is possible to realize a subject fixture 11 capable of appropriately fixing each interest site Ma for X-ray imaging of a plurality of interest region Ma without using a plurality of base portions 13. Further, by removing the frame body 15 from the base portion 13, the storage space for the subject fixture 11 can be reduced.
  • the X-ray imaging system 1 has an X-ray tube 5 for irradiating the subject M with X-rays and an X-ray detection for detecting the X-rays irradiated from the X-ray tube 5 and transmitted through the subject M.
  • the device 7 includes an image generation unit 9 that generates an X-ray image based on a detection signal output by the X-ray detector 7, and a subject fixture 11 according to the present embodiment.
  • the configuration includes the subject fixture 11 according to the present embodiment. Therefore, the position of the interest portion Ma can be fixed by a simple operation of inserting the filling member 17 into the gap portion 16 between the frame body 15 and the interest portion Ma which are arranged so as to face each other with the interest portion Ma interposed therebetween. Therefore, since the region of interest Ma can be reliably fixed without being influenced by the skill of the operator, it is possible to realize an X-ray imaging system that can reliably reduce blurring or artifacts generated in the X-ray image.
  • each of the pair of frame bodies 15 is bonded and fixed to the base portion 13, but the present invention is not limited to this. That is, at least one of the frame body 15a and the frame body 15b may be detachably configured on the base portion 13.
  • the frame body 15 and the base portion 13 are provided with the engaging portion Ke, and the frame body 15 and the base portion 13 are engaged with each other via the engaging portion Ke, thereby engaging the frame body. Examples thereof include a configuration in which 15 is fixed to the base portion 13.
  • each interest region Ma can be appropriately fixed for X-ray imaging of a plurality of interest region Ma without using a plurality of base portions 13.
  • the sample fixture 11 can be realized.
  • the frame body 15 used when the elbow portion is the site of interest Ma as in the first embodiment to the base portion 13 and performing X-ray photography of the elbow portion
  • the frame body 15 is used as the base portion. Remove from 13.
  • another frame body 15, which is used when the wrist joint is the site of interest Ma as in the second embodiment can be attached to the base portion 13 to perform X-ray imaging.
  • the frame body 15 is detachably configured to be attached to and detached from the base portion 13, so that the versatility of the subject fixture 11 can be further improved. Further, by removing the frame body 15 from the base portion 13, the space required for storing the subject fixture 11 after use can be reduced.
  • the adaptability of the subject fixture 11 can be improved. That is, as shown in FIG. 16, the frame body 15a having the inclination angle of the inclined surface G of ⁇ 1 is detached from the base portion 13, and another frame body 15c having the inclination angle of the inclined surface G of ⁇ 2 is attached to the base portion 13. Can be made to. By replacing the frame body 15 in this way, the inclination angle at which the region of interest Ma can be stably fixed can be changed from ⁇ 1 to ⁇ 2. Therefore, as an example, when it becomes necessary to change the internal rotation angle of the hip joint in bone density measurement, the subject fixture adapted to various internal rotation angles by replacing the frame body 15 having the inclined surface G. 11 can be realized.
  • the subject fixture 11 may be provided with an alignment portion capable of fixing the positional relationship with the X-ray detector 7.
  • the positioning portion as shown in FIG. 17, a configuration in which a recess 21 is provided on the bottom surface side of the base portion 13 can be mentioned.
  • the size and depth of the recess 21 are designed according to the size and thickness of the X-ray detector 7. That is, by fitting the X-ray detector 7 into the recess 21, the positioning of the subject fixture 11 and the X-ray detector 7 can be performed with high accuracy.
  • the X-ray detector 7 is included in the recess 21 in a state where the X-ray detector 7 is fitted as shown in FIG.
  • the subject fixture 11 is placed on the top plate 3. Then, by placing the interest portion Ma of the subject M in the gap portion 16 and filling the filling member 17, the interest portion Ma is surely fixed in a state of being arranged above the X-ray detector 7.
  • a slit portion having a size corresponding to the size of the X-ray detector 7 is provided on the side surface of the base portion 13 or the frame body 15, and the X-ray detector 7 is inserted into the slit portion.
  • the configuration to be used is mentioned.
  • the base portion 13 may be omitted as long as the positional relationship between the frame body 15a and the frame body 15b can be maintained.
  • An example of the subject fixture 11 in which the base portion 13 is omitted will be described with reference to FIG.
  • FIG. 19 shows the configuration of a modified example based on the subject fixture 11 according to the second embodiment.
  • the subject fixture 11 according to the modified example includes a connecting portion 23.
  • the connecting portion 23 is a flat plate-shaped member made of an X-ray transmissive material, and is in contact with the upper portion of the frame body 15a and the upper portion of the frame body 15b.
  • the frame body 15a and the frame body 15b are connected to each other via the connecting portion 23. Therefore, the positional relationship between the frame body 15a and the frame body 15b is determined according to the size of the connecting portion 23, and the positional relationship is maintained.
  • the connecting portion 23 is not limited to the configuration in which the upper portions of the frame body 15a and the frame body 15b are connected to each other, and the side portions of the frame body 15a and the frame body 15b may be connected to each other. Further, the frame body 15 including the frame body 15a, the frame body 15b, and the connecting portion 23 may be a single member in which each is integrated, or an independent member may be bonded and fixed to each other. You may.
  • the outer shape of the filling member 17 may be determined according to the shape of the inner surface of the frame body 15.
  • the portion of interest Ma (the hand portion of the subject M) is fixed by using the filling member 17a and the filling member 17e among the filling members 17a to 17e constituting the filling member 17. doing.
  • FIG. 21 is a diagram in which the filling member 17 is housed inside the frame body 15.
  • the filling members 17a to 17e constituting the filling member 17 have a shape that coincides with the inner surface of the frame body 15 when combined. That is, the outer shapes of the filling members 17a to 17e are configured to coincide with a part of the inner surface of the frame body 15.
  • the X-ray detector 7 is not limited to the flat panel type detector (FPD), and has a configuration capable of detecting X-rays using an image intensifier (I.I) as an example. It may be used as appropriate.
  • FPD flat panel type detector
  • I.I image intensifier

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  • Medical Informatics (AREA)
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  • Radiology & Medical Imaging (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract

L'invention concerne un dispositif de fixation de sujet (11) qui est doté : d'une paire de corps de châssis (15) ayant un corps de châssis (15a) et un corps de châssis (15b) qui sont disposés de façon à se faire face l'un à l'autre avec une région d'intérêt Ma, qui est un objet de radiographie, entre eux ; d'une partie de base (13) pour supporter le corps de châssis (15a) et le corps de châssis (15b) d'une manière qui maintient la relation de position entre le corps de châssis (15a) et le corps de châssis (15b) ; et d'un élément de remplissage (17) qui est formé d'un matériau de transmission de rayons X et qui peut être inséré pour remplir un espace (16) entre les corps de châssis (15) et la région d'intérêt Ma pour restreindre la région d'intérêt Ma.
PCT/JP2020/031260 2019-12-16 2020-08-19 Dispositif de fixation de sujet pour radiographie à rayons x et système de radiographie à rayons x WO2021124612A1 (fr)

Priority Applications (1)

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JP2021565329A JP7310923B2 (ja) 2019-12-16 2020-08-19 Ｘ線撮影用被検体固定具およびｘ線撮影システム

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JP2019-226525 2019-12-16

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WO2021124612A1 true WO2021124612A1 (fr) 2021-06-24

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JPS60176207U (ja) * 1984-04-28 1985-11-21 日産ディーゼル工業株式会社 フイルタ装置
JPH03193038A (ja) * 1989-12-25 1991-08-22 Toshiba Corp 被検体固定装置及びその製造方法
JP2000014671A (ja) * 1998-06-26 2000-01-18 Horiba Ltd 骨塩計
JP2005348971A (ja) * 2004-06-10 2005-12-22 Hakko Co Ltd 乳房圧迫保形器具
JP2012228419A (ja) * 2011-04-27 2012-11-22 Fujifilm Corp 放射線画像撮影装置
JP2014036774A (ja) * 2012-08-18 2014-02-27 System 21:Kk 撮影補助具
JP2016509955A (ja) * 2013-03-12 2016-04-04 デピュイ・シンセス・プロダクツ・インコーポレイテッド 患者の膝のｘ線画像を較正する装置及び方法
JP2019000308A (ja) * 2017-06-14 2019-01-10 キヤノンメディカルシステムズ株式会社 マンモグラフィ装置

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DE8411550U1 (de) * 1984-04-12 1984-06-20 Siemens AG, 1000 Berlin und 8000 München Diagnostikgerät für die Erzeugung von Schichtbildern eines Aufnahmeobjektes
JP3473200B2 (ja) * 1995-07-28 2003-12-02 株式会社島津製作所 頭部固定具
JP3756255B2 (ja) * 1996-07-09 2006-03-15 瑞穂医科工業株式会社 整形外科用手術台
JP2012152436A (ja) * 2011-01-27 2012-08-16 Fujifilm Corp 撮影用補助具および放射線画像撮影方法
JP2013085631A (ja) * 2011-10-17 2013-05-13 Konica Minolta Medical & Graphic Inc 関節撮影装置
CU24373B1 (es) * 2015-09-24 2018-11-06 Centro De Ingenieria Genetica Y Biotecnologia Biocubafarma Marco estereotáxico para extremidades
WO2017183632A1 (fr) * 2016-04-19 2017-10-26 ミズホ株式会社 Dispositif médical

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Publication number Priority date Publication date Assignee Title
JPS60176207U (ja) * 1984-04-28 1985-11-21 日産ディーゼル工業株式会社 フイルタ装置
JPH03193038A (ja) * 1989-12-25 1991-08-22 Toshiba Corp 被検体固定装置及びその製造方法
JP2000014671A (ja) * 1998-06-26 2000-01-18 Horiba Ltd 骨塩計
JP2005348971A (ja) * 2004-06-10 2005-12-22 Hakko Co Ltd 乳房圧迫保形器具
JP2012228419A (ja) * 2011-04-27 2012-11-22 Fujifilm Corp 放射線画像撮影装置
JP2014036774A (ja) * 2012-08-18 2014-02-27 System 21:Kk 撮影補助具
JP2016509955A (ja) * 2013-03-12 2016-04-04 デピュイ・シンセス・プロダクツ・インコーポレイテッド 患者の膝のｘ線画像を較正する装置及び方法
JP2019000308A (ja) * 2017-06-14 2019-01-10 キヤノンメディカルシステムズ株式会社 マンモグラフィ装置

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