JP5638461B2 - Press plate, radiation imaging device - Google Patents

Description

  The present invention relates to a pressing plate that presses a subject's breast against an imaging table, and a radiation imaging apparatus including the pressing plate.

Patent Document 1 describes a radiation imaging apparatus (mammography apparatus) that images a breast of a subject placed on an imaging table. The radiation imaging apparatus is provided with a pressing plate that presses the breast of the subject against the imaging table.

  Specifically, the pressing plate is detachably attached to the apparatus main body by sliding an attachment portion provided on the pressing plate into a slide provided in the apparatus main body.

JP 2002-65653 A

  However, in the conventional radiation imaging apparatus, the shape of the attaching part of the pressing plate is not disclosed in detail. For this reason, the shape of the attachment portion is considered to be a rectangular parallelepiped shape extending in the sliding direction in which the attachment portion is slid.

  The subject of this invention is mounting | wearing an apparatus main body with the attachment part of a press plate easily, and fixing an attachment part to an apparatus main body.

A pressing plate according to claim 1 of the present invention is provided with a pressing portion that presses a subject's breast against an imaging table irradiated with radiation from a radiation source, and a base end that extends from the pressing portion and supports the pressing portion. A pressing plate, and a mounting plate that is provided at a tip of the supporting unit and is detachably inserted into a plugged member provided in the apparatus main body. A first sliding surface slidable in the insertion direction of the mounting portion with respect to the insertion member, and provided on the opposite side to the first sliding surface, and the insertion with respect to the inserted member A second sliding surface slidable in the direction;
The first sliding surface intersects the second sliding surface, and is formed on the mounting surface, the mounting surface being slidable in the insertion direction of the mounting portion with respect to the inserted member, An opening extends in a direction orthogonal to the insertion direction in a state where the attachment portion is inserted into the inserted member, and a recess into which a protruding member provided in the apparatus main body is inserted. And

  According to the said structure, the press part supported by the support part presses a test subject's breast against the imaging stand with which radiation is irradiated from a radiation source. On the other hand, an attachment portion that is detachably inserted into a member to be inserted provided in the apparatus main body is provided at the tip of the support portion.

  Here, the attachment portion is provided with an attachment surface that intersects the first sliding surface and the second sliding surface and is slidable in the insertion direction of the attachment portion with respect to the inserted member. And the recessed part in which the protrusion member provided in the apparatus main body is inserted is formed in the attachment surface, and is extended in the direction which cross | intersects the insertion direction in the state which the attachment part was inserted in the to-be-inserted member.

  Thereby, the relative positional variation between the concave portion and the protruding member in the direction intersecting the insertion direction is absorbed, and rattling of the attachment portion in the insertion direction is suppressed. For this reason, the attachment part of a press plate can be easily attached to an apparatus main body, and an attachment part can be fixed to an apparatus main body.

  The pressing plate according to a second aspect of the present invention is characterized in that, in the first aspect, a tapered portion is provided at a corner portion constituted by the mounting surface and the concave portion.

  According to the said structure, the taper part is provided in the corner | angular part comprised from an attachment surface and a recessed part. By providing the tapered portion in this way, the protruding member can be easily guided into the concave portion.

  A pressing plate according to a third aspect of the present invention is the pressure plate according to the first or second aspect, wherein the pressing plate is provided on at least one of the first sliding surface and the second sliding surface, and the attachment portion is the inserted member. Is inserted into the recess, the restricting member that restricts the protrusion member retracted from the recess from being inserted into the recess is moved so that the protrusion member can be inserted into the recess, and compared to other peripheral surfaces. And an abutting surface protruding outward is provided.

  According to the above configuration, when the mounting portion is inserted into the member to be inserted, the protruding member that is retracted from the recessed portion is brought into contact with the restricting member that restricts insertion of the protruding member into the recessed portion, and the restricting member is moved to insert the protruding member into the recessed portion. An abutting surface that can be formed is formed so as to protrude outward relative to the other peripheral surfaces.

  Thereby, when inserting the mounting portion, it is possible to reduce the resistance that occurs when another surface hits the regulating member, and the mounting portion of the pressing plate can be easily attached to the device main body, and the mounting portion can be attached to the device main body. Can be fixed to.

  The pressing plate according to a fourth aspect of the present invention is the pressing plate according to the third aspect, wherein an inclined surface inclined with respect to the insertion direction is provided between the other surface and the contact surface. And

  According to the above configuration, the inclined surface is provided between the other surface and the contact surface. Thereby, since a control member moves along an inclined surface, the attachment part of a press board can be easily inserted in the to-be-inserted member with which the apparatus main body was equipped.

The radiation imaging apparatus according to claim 5 of the present invention, image capturing base and any one of claims 1 to 4 for pressing the subject's breast placed on the imaging table in the imaging platform subject breast placed al are a pressing plate according to a radiation source for irradiating the breast placed et the said imaging platform, provided in the apparatus main body, and the plug member mounting portion provided on the pressing plate is inserted, device A protrusion member that is provided on the main body and is inserted into a recess formed in the attachment portion when the attachment portion is inserted into the inserted member.

According to the said structure, the press plate of any one of Claims 1-4 presses the test subject's breast mounted on the imaging stand against an imaging stand. Then, the radiation source irradiates the breast placed on the imaging table with radiation.

  Here, the attachment part provided in the press plate of any one of Claims 1-4 is inserted in the to-be-inserted member provided in the apparatus main body. Furthermore, the protrusion member provided in the apparatus main body is inserted into the recess formed in the attachment portion when the attachment portion is inserted into the inserted member.

  Thus, the attachment part of the pressing plate can be easily attached to the apparatus main body, and the attachment part can be fixed to the apparatus main body.

  According to the present invention, the attachment portion of the pressing plate can be easily attached to the apparatus main body, and the attachment section can be fixed to the apparatus main body.

It is sectional drawing which showed the to-be-attached apparatus used for the X-ray imaging device which concerns on embodiment of this invention. It is sectional drawing which showed the to-be-attached apparatus used for the X-ray imaging device which concerns on embodiment of this invention. It is sectional drawing which showed the to-be-attached apparatus used for the X-ray imaging device which concerns on embodiment of this invention. It is the disassembled perspective view which showed the to-be-attached apparatus used for the X-ray imaging device which concerns on embodiment of this invention, and the attaching part of a press plate. It is the perspective view which showed the to-be-attached apparatus used for the X-ray imaging device which concerns on embodiment of this invention. (A) (B) It is the side view and sectional drawing of the attaching part in the press plate used for the X-ray imaging device which concerns on embodiment of this invention. It is the perspective view which showed the attaching part of the press plate used for the X-ray imaging device which concerns on embodiment of this invention. (A) (B) (C) It is the front view, top view, and sectional drawing of a press plate used for the X-ray imaging device which concerns on embodiment of this invention. It is the perspective view which showed the to-be-attached apparatus used for the X-ray imaging device which concerns on embodiment of this invention, and the attaching part of a press plate. It is the side view which showed the X-ray imaging device which concerns on embodiment of this invention. 1 is a perspective view showing an X-ray imaging apparatus according to an embodiment of the present invention.

  An example of a radiation imaging apparatus according to an embodiment of the present invention will be described with reference to FIGS.

(overall structure)
As shown in FIGS. 10 and 11, an X-ray imaging apparatus (mammography) 10 as an example of a radiation imaging apparatus is an apparatus that images a breast N of a subject L in an upright state with an X-ray. Tail direction (Cranio & Caudal)) and MLO (inside / outside oblique direction: Media-Lateral-Oblique) imaging.

  In each figure, the vertical direction is indicated by an arrow V, the front-rear direction of the subject L is indicated by an arrow D, and the width direction of the subject L is indicated by an arrow W.

  The X-ray imaging apparatus 10 includes a measurement unit 12 provided on the subject L side in the front-rear direction of the subject L (hereinafter sometimes simply referred to as the front-rear direction), and a base unit 14 that supports the measurement unit 12 from behind. ing. The measuring unit 12 is provided with a rotating shaft 16 that extends to the back side in the front-rear direction (side not facing the subject L) and is rotatably supported by the base unit 14. And the measurement part 12 is rotatably supported by the base part 14 by the rotation axis | shaft 16 being supported by the base part 14. FIG.

  Furthermore, the measurement unit 12 is provided with an imaging table 22 on which a planar placement surface 20 on which a breast N of a standing subject L (patient) is placed and an X-ray tube (not shown) are provided. A radiation irradiation device 24 as an example of a radiation source that emits X-rays for examination toward the mounting surface 20, a pressing plate 26 that presses the breast N against the mounting surface 20, and the pressing plate 26 against the imaging table 22. A proximity separation mechanism 18 that moves in the proximity separation direction, and a holding unit 28 that holds the imaging table 22 and the radiation irradiation device 24 are provided.

  The proximity / separation mechanism 18 is provided with a case 50 as an example of an apparatus body to which a base end portion is fixed to a vertical movement mechanism (not shown) and a pressing plate 26 is detachably attached to a distal end portion. Details of the configuration in which the pressing plate 26 is detachably attached to the case 50 will be described later.

  In addition, the holding unit 28 is provided with a pair of handles 34 held by the subject L during CC imaging so as to sandwich the imaging table 22. Further, the grip portion 36 that constitutes the handle 34 and is gripped by the subject L is a rod-like portion that is inclined to the opposite side of the subject side with respect to the vertical line of the placement surface 20 (that is, the back side for the subject L). As it approaches the surface 20, it gradually approaches the subject L side.

  On the other hand, a chest wall abutting portion 38 is provided on the front side of the imaging table 22 in the front-rear direction to abut a chest portion below the breast N of the subject L during CC imaging. Further, a radiation detector (not shown) as an X-ray detector that is irradiated with radiation that has passed through the mounting surface 20 is provided inside the imaging table 22.

(Main part configuration)
Next, a configuration in which the pressing plate 26 is detachably attached to the apparatus main body will be described.

  As shown in FIG. 9, the pressing plate 26 includes a pressing portion 40 that presses the breast N against the imaging table 22 (see FIG. 11). Further, the pressing plate 26 includes a support portion 42 that is provided with a base end portion extending from a part of the pressing portion 40 and supports the pressing plate 26. A rectangular parallelepiped attachment portion 44 that is detachably attached to the attached device 52 provided at the distal end portion of the case 50 is formed at the distal end portion of the support portion 42.

  Specifically, as shown in FIGS. 4 and 5, the attached device 52 is provided with a C-shaped inserted member 54 into which the attachment portion 44 is inserted from the width direction. Specifically, the inserted member 54 includes a bottom surface 56 that extends in the vertical direction when viewed from the width direction (insertion direction). Further, the inserted member 54 includes a pair of side plates 58 extending toward the subject L in the front-rear direction with the upper end and the lower end of the bottom surface 56 as base ends, a flange portion 59 bent inward from the distal end portion of the side plate 58, It is comprised including. A circular hole 56 </ b> A penetrating the front and back of the bottom surface 56 is formed on the center side of the bottom surface 56.

  Further, inside the circular hole 56A, there is a columnar protruding member 60 that is inserted into a concave recess 86 (see FIG. 7) formed in the mounting portion 44 and fixes the mounting portion 44 to the inserted member 54. Is provided.

  As shown in FIG. 1, the protruding member 60 is provided extending in the front-rear direction (arrow D direction). The projecting member 60 is supported by a support member 62 provided integrally with the inserted member 54, and the projecting member 60 is inserted into the recessed portion 86 (see FIG. 2), and the projecting member 60 is disposed in the recessed portion 86. The mounting portion 44 can be moved between an allowable position (see FIGS. 1 and 3) that allows the mounting portion 44 to move in the width direction (insertion direction). That is, the protruding member 60 is moved to the subject L side in the front-rear direction and disposed at the insertion position, and is moved to the rear side in the front-rear direction and disposed at the retracted position.

  Furthermore, a moving member 64 that is fixed to the projecting member 60 and moves together with the projecting member 60 that moves is provided at the base end of the projecting member 60. The moving member 64 is formed by bending a plate member. The moving member 64 includes a bottom plate 64A having a base end portion of the projecting member 60 fixed and extending in the vertical direction when viewed from the width direction, a side plate 64B extending from the upper end of the bottom plate 64A to the subject side in the front-rear direction, and a bottom plate And a side plate 64C extending from the lower end of 64A to the subject side in the front-rear direction.

  Further, a casing member 66 that covers the moving member 64 and a regulating member 74 described later from the outside, is opened on both sides in the width direction and the subject L side in the front-rear direction, and moves in the front-rear direction together with the moving member is provided. . A grip portion 66A that can be gripped by an engineer is provided on the upper surface of the housing member 66 so as to protrude upward.

  On the other hand, on the opposite side of the protruding member 60 across the bottom plate 64A of the moving member 64, a support block 68 that is fixed to the moving member 64 and supports the bottom plate 64A of the moving member 64 is provided. Further, the attached device 52 includes a coil spring 70 as an example of a first urging member that urges the protruding member 60 via the support block 68 so that the protruding member 60 moves to the insertion position (see FIG. 2). Are provided.

  In addition, the support member 62 is provided with a plurality of identification pins 96 that can move in the front-rear direction (in this embodiment, for example, three in the upper stage and three in the lower stage, a total of six). A coil spring 98 is provided to bias the subject L in the front-rear direction. A detection member (not shown) that detects the movement of the identification pin 96 is provided on the base end side (back side in the front-rear direction) of the identification pin 96.

  Here, the spring coefficients of the plurality of coil springs 96 that bias the identification pin 96 (the sum of the spring coefficients of the individual coil springs 96) are the plurality of coils that bias the protruding member 60 via the support block 68. The spring coefficient of the spring 70 (the sum of the spring coefficients of the individual coil springs 70) is made smaller. That is, the movement of the protruding member 60 due to the urging force of the coil spring 70 is not affected by the movement of the identification pin 96 due to the urging force of the coil spring 98.

  Thus, when the mounting portion 44 is inserted into the inserted member 54 of the mounted device 52, the projecting member 60 is inserted into the concave portion 86 of the mounting portion 44 by the biasing force of the coil spring 70, and the mounting portion 44 is It is fixed to the inserted member 54. Then, the predetermined identification pin 96 moves (projects) toward the attachment portion 44 and is inserted into an identification recess 100 of the attachment portion 44 described later. On the other hand, the other identification pins 96 do not move (protrude) toward the mounting portion 44 due to elastic deformation (compression deformation) of the coil spring 98 (see FIG. 2). As a result, the type of the pressing plate 26 can be identified.

  That is, as described above, by making the spring coefficient of the plurality of coil springs 96 smaller than the spring coefficient of the plurality of coil springs 70, the mounting portion 40 is fixed by the protruding member 60, and then the identification pin 44 is used. The type of the pressing plate 26 can be identified.

  On the other hand, the side plates 64B and 64C of the moving member 64 are movable in a direction (vertical direction in this embodiment) to enter or retreat with respect to the insertion region 72 of the inserted member 54 into which the attachment portion 44 is inserted. A cylindrical regulating member 74 is provided. A coil spring 76 is provided as an example of a second urging member that urges the restricting member 74 in the entering direction to enter the insertion region 72.

  Specifically, when the attachment portion 44 is not inserted into the inserted member 54, the distal end side of the regulating member 74 that is biased in the entering direction by the coil spring 76 is viewed from the width direction. 54 enters the insertion region 72 through an opening 58A formed on the base end side of the side plate 58. The urging force of the coil spring 70 abuts against the edge of the opening 58 </ b> A to restrict the protrusion member 60 from moving from the retracted position to the insertion position. Further, an in-detection sensor (not shown) is provided at the base end portion of the restricting member 74. When the restricting member 74 moves in the retracting direction, it is detected that the attachment portion 44 is inserted into the inserted member 54. It is supposed to be.

  In addition, a tapered portion 74 </ b> A is formed at the distal end portion of the regulating member 74 so as to hit the attachment portion 44 inserted into the inserted member 54 and to be pushed in the retracting direction with respect to the insertion region 72. That is, in this state, the regulating member 74 is arranged at an allowable position that allows the attachment portion 44 to be inserted into the inserted member 54.

  Further, as shown in FIG. 2, when the regulating member 74 arranged at the allowable position is moved in the retracting direction, the contact state between the regulating member 74 and the edge of the opening 58 </ b> A is released, and the moving member 64 is moved. The regulating member 74 and the protruding member 60 to be fixed are moved to the subject L side in the front-rear direction by the urging force of the coil spring 70. Specifically, the restricting member 74 moves to the subject L side in the front-rear direction along the surface of the inserted member 54 facing the outside of the side plate 58.

  On the other hand, the protruding member 60 moves to the subject L side in the front-rear direction, and moves from the retracted position to the insertion position. That is, in this state, the restricting member 74 is arranged at a lock position where the restricting member 74 is moved by the urging force of the coil spring 70 to move the protruding member 60 from the retracted position to the inserting position.

  Further, as shown in FIG. 3, when the housing member 66 is moved to the back side in the front-rear direction, the regulating member 74 and the protruding member 60 are moved to the back side in the front-rear direction.

  Then, the regulating member 74 moves in the entering direction through the opening 58 </ b> A of the inserted member 54 by the urging force of the coil spring 76, and comes into contact with the mounting portion 44 inserted into the inserted member 54 in the front-rear direction. It is like that. On the other hand, the protruding member 60 moves to the back side in the front-rear direction, and moves from the insertion position to the retracted position. In this state, when the attachment portion 44 inserted into the inserted member 54 is detached from the inserted member 54, the restricting member 74 is moved by the urging force of the coil spring 70 and is allowed to move (see FIG. 1). ). That is, the restricting member 74 is arranged at a lock release position where the attachment portion 44 inserted into the inserted member 54 can be detached from the inserted member 54.

  Next, the attachment portion 44 of the pressing plate 26 inserted into the inserted member 54 will be described.

  As shown in FIGS. 6, 7, and 8, the attachment portion 44 has a rectangular parallelepiped shape extending in the width direction (insertion direction), and with respect to the side plate 58 provided above the inserted member 54. A first sliding surface 80 slidable in the width direction (insertion direction), and a side plate 58 provided on the opposite side of the first sliding surface 80 and provided below the inserted member 54. On the other hand, it has a pair of second sliding surfaces 82 slidable in the width direction (insertion direction).

  Furthermore, the mounting surface 84 is provided so that it may be pinched | interposed into the edge of the 1st sliding surface 80, and the edge of the 2nd sliding surface 82, and the mounting surface 84 is provided with the level | step difference surface 84A which protrudes in the back side of the front-back direction. ing. In other words, the mounting surface 84 intersects the first sliding surface 80 and the second sliding surface 82 and is provided so as to be slidable in the insertion direction of the mounting portion 44 with respect to the inserted member 54. Yes. Further, the step surface 84A provided on the mounting surface 84 extends in a direction intersecting the width direction (a direction orthogonal to the present embodiment) in a state where the mounting portion 44 is inserted into the inserted member 54. A slot-like recess 86 is formed. Further, a tapered portion 88 is provided at a corner portion constituted by the step surface 84 and the concave portion 86 so that the protruding member 60 is easily swallowed by the concave portion 86.

  Furthermore, three circular identification recesses 100 are provided on the step surface 84A, and the above-described identification pin 96 is inserted by the biasing force of the coil spring 98 (see FIG. 2).

  On the other hand, when the mounting portion 44 is inserted into the inserted member 54 (see FIG. 4), the regulating member that has entered the insertion region 72 from the opening 54A is inserted into the first sliding surface 80 and the second sliding surface 82. An abutting surface 90 is provided to contact the tapered portion 74 </ b> A of 74 and retract the regulating member 74.

  The contact surface 90 is formed so as to protrude outward from the other surfaces 92 arranged on both sides of the contact surface 90 in the width direction (insertion direction). An inclined surface 94 that is inclined with respect to the width direction is provided therebetween.

(Action / Effect)
Next, the operation of the main configuration will be described while showing a method for attaching and detaching the pressing plate 26.

  As shown in FIGS. 1 and 4, the restricting member 74 is attached to the inserted member 54 when the attaching portion 44 of the pressing plate 26 is not inserted into the inserted member 54 of the attached device 52. The portion 44 is disposed at an allowable position that allows the portion 44 to be inserted.

  Specifically, due to the urging force of the coil spring 76, the distal end portion of the regulating member 74 enters the insertion region 72 through the opening 58 </ b> A provided in the side plate 58 of the inserted member 54. Then, due to the urging force of the coil spring 70, the restricting member 74 hits the edge of the opening 58A in the front-rear direction and restricts the protrusion member 60 from moving toward the subject L in the front-rear direction. Thus, the protruding member 60 is disposed at an allowable position that retracts from the concave portion 86 of the mounting portion 44 and allows the mounting portion 44 to move in the width direction (insertion direction).

  As shown in FIG. 4, when the pressing plate 26 is attached to the attached device 52, the attaching portion 44 of the pressing plate 26 is moved in the width direction, and the attaching portion 44 is inserted into the inserted member 54. As a result, the tip portions of the pair of regulating members 74 are pressed in the retracting direction along the inclined surface 94 while facing the other surfaces 92 formed on the first sliding surface 80 and the second sliding surface 82. To the contact surface 90.

  As shown in FIG. 2, when the regulating member 74 arranged at the allowable position is moved in the retracting direction, the contact state between the regulating member 74 and the edge of the opening 58A is released. The restricting member 74 and the protruding member 60 fixed to the moving member 64 are moved toward the subject L in the front-rear direction by the urging force of the coil spring 70. Specifically, the regulating member 74 moves to the subject L side in the front-rear direction along a surface facing the outside of the side plate 58 of the inserted member 54. An in-detection sensor (not shown) provided at the base end portion of the regulating member 74 detects that the attachment portion 44 has been inserted into the inserted member 54.

  On the other hand, the protrusion member 60 also moves to the subject L side in the front-rear direction, and moves from the retracted position to the insertion position. That is, the protruding member 60 is inserted into the recess 86 along the tapered portion 88.

  Further, the identification pin 98 facing the identification concave portion 100 formed in the attachment portion 44 is inserted into the identification concave portion 100 by the urging force of the coil spring 98. As a result, a detection member (not shown) provided on the base end side of the identification pin 96 detects which identification pin 96 has moved, thereby identifying which type of pressing plate 26 has been inserted. . In this state, the restricting member 74 is arranged at a lock position where the restricting member 74 is moved by the urging force of the coil spring 70 to move the protruding member 60 from the retracted position to the inserting position.

  Then, the breast N of the subject L placed on the imaging table 22 is pressed with the pressing plate 26 fixed to the attached device 52, and the breast N is imaged using the radiation irradiation device 24 (see FIG. 10).

  As shown in FIG. 3, when the pressing plate 26 is detached from the attached device 52, the engineer grips the grip portion 66 </ b> A of the housing member 66 and moves the housing member 66 to the back side in the front-rear direction. Let Thereby, the regulating member 74 and the protruding member 60 move to the back side in the front-rear direction.

  Then, the regulating member 74 moves in the entering direction through the opening 58 </ b> A of the inserted member 54 by the urging force of the coil spring 76, and comes into contact with the mounting portion 44 inserted into the inserted member 54 in the front-rear direction. .

  On the other hand, the protruding member 60 moves to the back side in the front-rear direction, and moves from the insertion position to the retracted position. That is, in this state, the restricting member 74 is disposed at the unlocking position where the attachment portion 44 inserted into the inserted member 54 can be detached from the inserted member 54.

  Then, when the engineer moves the attachment portion 44 of the pressing plate 26 in the width direction and separates it from the inserted member 54, the contact between the restriction member 74 and the attachment portion 44 is released, and the restriction member 74 is shown in FIG. Return to the permissible position shown in.

  As described above, the concave portion 86 formed in the attachment portion 44 extends in a direction intersecting the width direction (insertion direction) (a direction orthogonal in the present embodiment). Thereby, in the direction orthogonal to the insertion direction, it is possible to absorb the relative position variation between the concave portion 86 and the protruding member 60 and to suppress the mounting portion 44 from rattling in the insertion direction. For this reason, it is possible to easily attach the attachment portion 44 of the pressing plate 26 to the inserted member 54 and fix the attachment portion 44 to the apparatus main body.

  Further, according to the above configuration, the tapered portion 88 is provided at the corner portion constituted by the step surface 84 </ b> A of the mounting surface 84 and the concave portion 86. For this reason, the protruding member 60 can be easily guided into the concave portion 86 by the tapered portion 88.

  In addition, according to the above configuration, the contact surface 90 that contacts the restriction member 74 and moves the restriction member 74 is formed so as to protrude outward as compared with the other peripheral surface 92. Thereby, when the attachment portion 44 is inserted, the attachment portion 44 of the pressing plate 26 can be easily attached to the inserted member 54 by reducing the resistance generated when the other surface 92 and the regulating member 74 come into contact with each other. Then, the attachment portion 44 can be fixed to the apparatus main body.

  Further, according to the above configuration, the inclined surface 94 is provided between the other surface 92 and the contact surface 90. Thereby, since the regulating member 74 moves along the inclined surface 94, the attachment portion 44 of the pressing plate 26 can be easily inserted into the inserted member 54.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, although not specifically mentioned in the above embodiment, the X-ray imaging apparatus 10 described above may be used when performing stereo imaging or tomosynthesis imaging.

10 X-ray imaging device (an example of a radiation imaging device)
22 Imaging stand 24 Radiation irradiation device (an example of a radiation source)
26 Pressing plate 40 Pressing portion 42 Supporting portion 44 Mounting portion 54 Inserted member 60 Projecting member 74 Restricting member 80 First sliding surface 82 Second sliding surface 84 Mounting surface 86 Recess 88 Tapered portion 90 Contact surface 92 Other Surface 94 Inclined surface

Claims (5)

A pressing unit that presses the breast of the subject against an imaging table irradiated with radiation from a radiation source;
A base end is provided extending from the pressing portion, and a supporting portion for supporting the pressing portion;
A pressing plate provided at a tip of the support portion and detachably inserted into a member to be inserted provided in the apparatus main body,
The mounting portion is
A first sliding surface slidable in the insertion direction of the mounting portion with respect to the inserted member;
A second sliding surface provided on the opposite side to the first sliding surface and slidable in the insertion direction with respect to the inserted member;
A mounting surface that intersects the first sliding surface and the second sliding surface and is slidable in the insertion direction of the mounting portion with respect to the inserted member,
An opening extends in a direction orthogonal to the insertion direction in a state where the attachment portion is inserted into the inserted member, and a protruding member provided in the apparatus main body is inserted. A pressing plate comprising a recess.   The pressing plate according to claim 1, wherein a corner portion formed by the mounting surface and the concave portion is provided with a tapered portion.   Provided on at least one of the first sliding surface and the second sliding surface, and when the mounting portion is inserted into the inserted member, the protruding member retracted from the concave portion is inserted into the concave portion. The pressing member according to claim 1 or 2, wherein a regulating member that regulates is moved so that the protruding member can be inserted into the concave portion, and a contact surface that protrudes outward as compared with other peripheral surfaces is provided. Board.   The pressing plate according to claim 3, wherein an inclined surface inclined with respect to the insertion direction is provided between the other surface and the contact surface. And the imaging table subject of the breast is placed, et al. Are,
The pressing plate according to any one of claims 1 to 4, wherein the breast of the subject placed on the imaging table is pressed against the imaging table.
A radiation source for irradiating radiation to the imaging platform to put al breast,
A member to be inserted, which is provided in the apparatus main body and into which the attachment portion provided in the pressing plate is inserted;
Protruding members that are provided in the apparatus main body and that are inserted into the recesses formed in the attachment portion when the attachment portion is inserted into the inserted member;
A radiation imaging apparatus comprising:

Images