JP5400814B2 - Biopsy spacer - Google Patents

Description

  The present invention raises the thickness of a test object having a small thickness after compression in a biopsy for puncturing a biopsy needle into a test object of a living body such as a human body and collecting a tissue at a biopsy site in the test object. It is related with the spacer for.

  2. Description of the Related Art Conventionally, biopsy has been widely performed in which a biopsy needle is punctured into a living body inspection target such as a human body and a tissue at a biopsy site in the inspection target is collected (see, for example, Patent Document 1). In this case, a radiation image of the breast is obtained by irradiating the breast with radiation in a state where the inspection object (breast) placed on the imaging table is compressed and held by the compression plate, and obtained from the radiation image. The tissue at the biopsy site is collected by puncturing the breast with a biopsy needle based on the position of the biopsy site.

  By the way, the biopsy needle used for biopsy is provided with a collection part (opening) for collecting tissue of the biopsy site on the side surface on the needle tip side. Therefore, when the breast is compressed and held in order to collect the calcified tissue in the breast, if the thickness of the breast after compression is thin, the biopsy site and the sampling part are opposed to the raw breast so that the biopsy site is opposed to the sampling part. When the needle is punctured, the needle tip of the biopsy needle penetrates the breast and reaches the imaging table, so that the tissue at the biopsy site cannot be collected.

  Therefore, conventionally, a styrofoam plate or an acrylic plate or the like with an opening formed thereon is arranged on the photographing table, and the breast is placed on the spacer and raised to the bottom, so that the apparent thickness at the time of compression is increased. The air gap method which increases is performed (refer nonpatent literature 1).

JP 2002-360556 A

Edited by Hiroko Kakuda, Kiyotsugu Nakamura, and Hiroshi Yagata "Practical mammotom biopsy from basic technique to troubleshooting" Nakayama Shoten, March 14, 2008, p. 35-36

  However, when the air gap method is applied to a biopsy for a relatively small breast, it is difficult to fix the breast and there is a problem that the compressed and held breast easily moves. Further, even if the bottom is raised with the spacer, the actual breast thickness at the time of compression does not change, so the needle tip of the biopsy needle may penetrate the breast. Further, in the acrylic plate spacer in which the opening is formed, there is a side connecting the surface defining the opening (vertical portion formed along the compression direction of the breast) and the mounting surface of the breast. Since it becomes a right-angled part, when a breast presses against the said right-angled part at the time of compression, there exists a possibility that a biological body may feel pain.

  The present invention has been made in order to solve the above-described problem, and even for an inspection object having a thin thickness at the time of compression, the inspection object is reliably compressed and collected and a tissue at a biopsy site is collected. An object of the present invention is to provide a biopsy spacer capable of reducing the pain felt by a living body during compression.

  The present invention relates to a biopsy spacer in which an opening penetrating from one surface to the other surface of a spacer main body on which a living body test object is placed is formed, and at least two of the surfaces defining the opening. And an inclined portion formed on the one surface side and inclined toward the inner side of the opening, and a compression direction of the inspection object formed on the other surface side and directed from the one surface toward the other surface. It is characterized in that a vertical portion is formed.

  According to the present invention, the inclined part and the vertical part are formed in order along the compression direction on the at least two surfaces, so that when the inspection object is compressed, The portion is fixed so as to be pushed into an inner space of the opening formed by the inclined portion and the vertical portion while being compressed along the inclined portion and the vertical portion. In this manner, by swirling the space with a part of the inspection object, it is possible to reliably fix even a relatively small inspection object as compared with the conventional air gap method.

  Moreover, the thickness of the said test target object after compression can be increased by swelling the said space with a part of said test target object. As a result, the tissue of the biopsy site can be collected without the needle tip of the biopsy needle penetrating from the inspection object.

  Further, the inclined portion is formed inward of the opening, and the vertical portion connected to the inclined portion is formed along the compression direction, so that the connecting portion between the inclined portion and the one surface is formed. (Side) and the connecting portion between the inclined portion and the vertical portion are not right-angle portions. As a result, it is possible to relieve the pain felt by the living body when the test object is pressed in the compression direction and a part of the test object is pushed into the space.

  Therefore, according to the present invention, even when an object to be examined is thin, the tissue at the biopsy site can be collected by reliably compressing and holding the object to be examined. The pain that the living body feels can be relieved.

  Here, the opening is defined by the at least two surfaces and the surface on the living body side, and the surface on the living body side includes only a vertical portion formed along the compression direction of the inspection object. The height of the living body side surface along the compression direction may be lower than the height of the at least two surfaces along the compression direction. Thereby, the surface on the living body side functions as a bank against the test object in a compressed state, relieves pain felt by the living body at the time of compression, and the displacement of the test object at the time of compression and the compression direction The inspection object can be prevented from coming off in the direction intersecting with.

  Further, if the vertical portions are chamfered, the pain felt by the living body during compression can be reduced. In this case, if the height of the vertical part constituting the at least two surfaces along the compression direction is 4 mm or less, the pain felt by the living body can be further alleviated.

  In the present invention, it is also possible to adjust the height of the biopsy spacer in accordance with the shape and size of the inspection object.

  In order to realize such height adjustment, in the present invention, the opening is formed in one spacer body to form the biopsy spacer, or at least two spacer bodies are arranged in the compression direction. And the biopsy spacer is formed by forming the openings so as to penetrate the spacer bodies.

  Thereby, a doctor or an engineer prepares two or more spacer bodies in advance, and uses only one spacer body according to the shape and size of the inspection object, or two or more. The spacer main body may be laminated and used. As a result, the height of the biopsy spacer can be easily adjusted, and the usability of the biopsy spacer is improved.

  Here, when the spacer main bodies are stacked, the vertical portion is formed on the bottom surface side of the lower layer side spacer main body, and the inclined portion is substantially flush from the upper layer side spacer main body to the vertical portion. Formed to be. As a result, even in the biopsy spacer in which two or more spacer bodies are stacked, the test object is compressed in the compression direction, and a part of the test object is placed in the inner space of the opening. The pain felt by the living body can be relieved when swelled.

  In addition, when the two or more spacer bodies are stacked, the inclined portion is substantially flush with each other, and the inclined portion of the upper layer side spacer main body and the lower layer side spacer main body of the inclined portion are inclined. The inclined portions are parallel to each other, but a slight step (a step of about several mm, preferably a step of about 2 mm to 3 mm) is formed between the spacer bodies. If you are.

  Further, positioning portions for positioning and laminating the spacer bodies may be provided on the bottom surface of the upper spacer body and the upper surface of the lower spacer body, respectively. Thereby, at the time of compression of the said test object, the position shift of the said upper layer side spacer main body with respect to the said lower layer side spacer main body resulting from the stress which acts on the direction orthogonal to the said compression direction can be suppressed.

  Further, each positioning portion is a convex member provided on the bottom surface of the spacer body on the upper layer side and a concave portion provided on the upper surface of the spacer main body on the lower layer side and fitted to the convex member. Alternatively, any magnet may be provided on the bottom surface of the upper spacer body and the upper surface of the lower spacer body. In any case, it is possible to effectively suppress the displacement of the upper spacer body with respect to the lower spacer body when the test object is compressed.

  Furthermore, if an adhesive member for adhering to the upper surface of the lower layer side spacer body is disposed on the bottom surface of the upper layer side spacer body, the upper layer side spacer body is attached to the lower layer side spacer body. It becomes possible to stick so that peeling is possible.

  Further, a concave portion connected to the inclined portion and recessed toward the lower spacer body may be provided on the distal side of the living body in the upper spacer body.

  In the biopsy spacer in which two or more spacer bodies are stacked, a part of the object to be inspected is deeply swollen in the inner space of the opening as compared with the case where one spacer body is used. Even if a doctor or an engineer puts a hand into the opening to position the inspection object, the positioning may not be easily performed.

  Thus, as described above, even when two or more spacer bodies are stacked by providing the concave portion connected to the inclined portion on the distal side of the living body, the doctor or the engineer can remove the concave portion. Thus, the opening can be easily put in, and as a result, the inspection object can be easily positioned.

  In the biopsy spacer according to the present invention, if the opening is rectangular in plan view, the opening can be easily formed.

  Furthermore, if the spacer body chamfers a portion that may come into contact with the inspection object, the pain felt by the living body can be further reduced.

  The spacer body is preferably made of a material that prevents scattering of radiation and is washable. Thereby, when radiography is performed on the inspection object, a high-quality radiographic image can be obtained, and the position of the biopsy site can be accurately obtained based on the radiographic image. In addition, by making the spacer body washable, the biopsy spacer can be maintained in a clean state.

  Furthermore, by disposing an adhesive member on the other surface, the biopsy spacer can be detachably attached to the photographing stand.

  Furthermore, by providing a handle at a location in the spacer body that does not come into contact with the living body and the inspection object when the inspection object is compressed, the spacer body can be easily carried and the imaging table or the like can be used. The adhered spacer main body can be easily peeled off.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a test object with thin thickness at the time of compression, it becomes possible to extract | collect the tissue of a biopsy site | part by pressing and holding this test object reliably, You can relieve the pain you feel.

It is a perspective view of a mammography device to which a biopsy spacer according to the present embodiment is applied. FIG. 2 is a partially omitted side view of the mammography apparatus of FIG. 3A and 3B are perspective views of the biopsy spacer according to the present embodiment. 4A is a cross-sectional view taken along line IVA-IVA in FIG. 3A, and FIG. 4B is a cross-sectional view taken along line IVB-IVB in FIG. 3A. It is a top view of the spacer for biopsies of FIG. 3A and 3B. FIG. 6A and FIG. 6B are explanatory diagrams showing the compressed state of the mammo by the compression plate and the biopsy spacer. 7A and 7B are perspective views showing a modification of the biopsy spacer according to the present embodiment. It is a perspective view which shows the modification of the biopsy spacer which concerns on this embodiment. It is a perspective view of the spacer for biopsies comprised by laminating | stacking two spacer main bodies. FIG. 10 is an exploded perspective view of the biopsy spacer of FIG. 9. It is a perspective view of the spacer body of the upper layer side shown in FIG.9 and FIG.10. 12A is a cross-sectional view taken along line XIIA-XIIA in FIG. 9, and FIG. 12B is a cross-sectional view taken along line XIIB-XIIB in FIG. It is a perspective view which shows the modification of the biopsy spacer of FIG. It is a disassembled perspective view of the biopsy spacer of FIG.

  A preferred embodiment of the biopsy spacer according to the present invention in relation to a mammography apparatus will be described in detail with reference to FIGS.

  As shown in FIGS. 1 and 2, the mammography apparatus 12 in which the biopsy spacer 10 according to the present embodiment is used basically includes a base 14 installed in an upright state and an abbreviation of the base 14. An arm member 18 fixed to the distal end portion of the pivot shaft 16 disposed in the central portion and a radiation source 26 for irradiating the mammo 22 as an inspection object of the subject (living body) 20 with radiation 24 are accommodated. In addition, a radiation source accommodating portion 28 fixed to one end portion of the arm member 18 and a solid state detector 30 for detecting the radiation 24 transmitted through the mammo 22 are accommodated, and fixed to the other end portion of the arm member 18. The imaging table 32, the biopsy spacer 10 disposed on the imaging table 32, the compression plate 34 that presses and holds the mammo 22 against the imaging table 32 and the biopsy spacer 10, and the compression plate 34. The And, and a biopsy hand assembly 38 for collecting the necessary tissue from the biopsy region 36 of the breast 22.

  The base 14 is provided with a display operation unit 40 that displays imaging conditions such as an imaging region of the subject 20, ID information of the subject 20, and the like, and can set such information as necessary. The

  The arm member 18 that couples the radiation source housing unit 28 and the imaging table 32 is configured to be adjustable about the direction of the subject 20 with respect to the mammo 22 by turning about the turning axis 16. The radiation source accommodating portion 28 is connected to the arm member 18 via a hinge portion 42, and is configured to be able to turn independently of the imaging table 32 in the arrow θ direction.

  On both sides of the arm member 18 along the arrow X direction, there are provided handle portions 44 for the subject 20 to grip, and the side portions of the arm member 18 facing the subject 20 in the arrow Y direction (front view). The groove portion 46 is provided along the arrow Z direction. The compression plate 34 is disposed between the radiation source accommodating portion 28 and the imaging table 32 by inserting the base end portion of the compression plate 34 into the groove portion 46 and fitting with the attachment portion (not shown). By displacing along the groove portion 46 in the arrow Z direction, it can be displaced in the arrow Z direction integrally with the mounting portion.

  Further, an opening 50 for tissue collection using the biopsy hand unit 38 is provided on the subject 20 side of the compression plate 34. The biopsy hand unit 38 includes a post 52 fixed to the compression plate 34, a first arm 54 pivotally supported along the surface of the compression plate 34, one end of which is pivotally supported on the post 52, and the first arm 54. One end portion is pivotally supported on the end portion, and a second arm 56 that can pivot along the surface of the compression plate 34 is provided. A biopsy needle 58 that is movable in the arrow Z direction is attached to the other end of the second arm 56.

  The biopsy needle 58 has a collection unit 60 that sucks and collects tissue (for example, calcified tissue) of the biopsy site 36 of the mammo 22. The collection unit 60 of the biopsy needle 58 moves the first arm 54 and the second arm 56 of the biopsy hand unit 38 in the XY plane along the surface of the compression plate 34 and moves the biopsy needle 58 in the arrow Z direction. By moving it, it can be placed near the biopsy site 36.

  Next, the configuration of the biopsy spacer 10 according to the present embodiment will be described in detail with reference to FIGS.

  The biopsy spacer 10 has a substantially rectangular spacer body 64. The spacer body 64 is preferably made of a material that prevents scattering of the radiation 24 and can be cleaned with a cleaning liquid such as ethanol. Specifically, any resin material such as PC (polycarbonate), POM (polyacetal), ABS (acrylonitrile / butadiene / styrene) having resistance to ethanol may be used. If cleaning is not performed, a biopsy spacer 10 made of PMMA (polymethyl methacrylate) may be used. The color of the biopsy spacer 10 may be any color other than black, for example, a clean color such as white, or colorless and transparent.

  The connection portion (side) between the upper surface 66 and the side surface of the biopsy spacer 10 is a chamfered portion because the subject 20 and the mammo 22 may come into contact with each other when the mammo 22 is compressed. An opening 70 is formed on the chest wall 48 side of the biopsy spacer 10 so as to penetrate from the upper surface 66 as the mounting surface (one surface) of the mammo 22 toward the bottom surface (other surface) 68.

  Furthermore, a handle 72 for a doctor or engineer to grip the spacer main body 64 is provided at a position away from the opening 70 on the bottom surface 68. In addition, the location where the handle 72 is provided is not limited to the location shown in FIGS. 3A and 3B, and may be provided where the subject 20 and the mammo 22 do not contact when the mammo 22 is compressed.

  Furthermore, two adhesive members 74 such as a gel tack sheet (trade name) are disposed on the bottom surface 68 in order to detachably attach the biopsy spacer 10 to the imaging table 32. A commercially available double-sided tape may be used for the two adhesive members 74 in order to improve the adhesive force between the biopsy spacer 10 and the imaging table 32.

  Here, the shape of the opening 70 will be described in more detail.

  The opening 70 is defined by four surfaces 75 and 79 formed along a direction from the upper surface 66 toward the bottom surface 68 (Z direction, which is the compression direction of the mammo 22). That is, the substantially rectangular opening 70 is defined in plan view by the one surface 79 on the chest wall 48 side and the three surfaces 75 other than the one surface 79.

  In this case, the three surfaces 75 each have an inclined portion 76 that inclines toward the inside of the opening 70 along the compression direction (Z direction) of the mammo 22 from the upper surface 66 toward the bottom surface 68, and the inclined portion 76. And a vertical portion 78 formed along the compression direction between the bottom surface 68 and the bottom surface 68. Accordingly, the three surfaces 75 are formed in a bowl shape so as to surround a space formed inside the opening 70.

  On the other hand, the location on the one surface 79 side of the spacer main body 64 is inclined along the inclined portions 76 of the two surfaces 75 formed on the two adhesive members 74 side, and the other portion of the spacer main body 64. Is set to a lower height. Accordingly, the height C (see FIG. 4A) of the one surface 79 along the compression direction is lower than the height D of the other three surfaces 75 along the compression direction (C <D). . Further, unlike the other three surfaces 75, the one surface 79 is composed only of a vertical portion 80 formed along the compression direction. Further, the height C of one surface 79 (the vertical portion 80 constituting the surface 79) is set higher than the height B of the vertical portion 78 (C> B).

  Therefore, the tapered three inclined portions 76 and the four vertical portions 78 and 80 form a rectangular shape in the plan view of FIG. 5, and a bowl-shaped opening 70 in the side view of FIG. 4A and the front view of FIG. 4B. It is formed. In this case, the bottom surface 68 side formed by the four vertical portions 78 and 80 of the opening 70 formed in a bowl shape along the compression direction is configured as a rectangular hole 81. In the present embodiment, the surfaces 75 other than the one surface 79 are not limited to the three surfaces shown in FIG.

  Further, the connecting portions (sides) between the inclined portions 76 and the vertical portions 78 and the vertical portions 78 and 80 that may come into contact with the subject 20 and the mammo 22 when the mammo 22 is compressed are also described above. R is chamfered in the same manner as each side connecting 66 and the side surface.

  In the biopsy spacer 10 configured as described above, the spacer main body 64 may be approximately the same size as the compression plate 34 in the plan view of FIG. Further, the hole 81 constituting the opening 70 may be substantially the same size as the opening 50 of the compression plate 34 or smaller than the opening 50 in the plan view.

  Here, an example of the dimensions of the above-described biopsy spacer 10 will be described.

  When the lateral width (length in the X direction) and the depth (length in the Y direction) of the compression plate 34 and the spacer body 64 are 150 mm × 150 mm, respectively, and the thickness in the Z direction is 10 mm to 30 mm, respectively. The size of the opening 50 of the compression plate 34 and the size of the opening 70 of the spacer main body 64 is 90 mm (A = 90 mm) × 64 mm in the plan view of FIG. The height is 50 mm × 50 mm. Accordingly, in the plan view, the length from the upper surface 66 side to the vertical portion 78 side of each inclined portion 76 is 20 mm. Further, the height B of the vertical portion 78 is 3 mm, and the height C of the vertical portion 80 is 6 mm. In addition, the height B of the vertical part 78 should just be lower than the height C of the vertical part 80, for example, should just be 4 mm or less (B <C and B <= 4mm).

  In addition, said dimension is an example and it is needless to say that it may change suitably according to the magnitude | size of the mammo 22 hold | maintained by compression, the specification of the biopsy needle 58, etc. FIG.

  By the way, for example, the distance from the tip of the biopsy needle 58 to the collection unit 60 is 5 mm to 10 mm, the length of the collection unit 60 is 19.4 mm, and the thickness of the mammo 22 after compression is as thin as 10 mm to 20 mm. In this case, conventionally, an air gap method is used in which a spacer such as a foamed polystyrene plate or an acrylic plate having an opening is disposed on the photographing table 32 to raise the mammo 22 to the bottom. However, the air gap method has a problem that it is difficult to fix the relatively small mammo 22 and the compressed mammo 22 is easy to move. Further, even if the bottom is raised with a spacer, the actual thickness of the mammo 22 during compression does not change, so that the needle tip of the biopsy needle 58 may penetrate the mammo 22. Further, in the acrylic plate spacer in which the opening is formed, there is a side connecting the surface defining the opening (vertical portion formed along the compression direction of the mammo 22) and the mounting surface of the mammo 22. Since it becomes a right angle part, when the mammo 22 presses against the right angle part at the time of compression, the subject 20 may feel pain.

  On the other hand, in the biopsy spacer 10 according to the present embodiment, the three surfaces 75 constituted by the inclined portions 76 and the vertical portions 78 and the one surface 79 constituted only by the vertical portions 80 are shown in FIG. A rectangular shape in a plan view of FIG. 4A and a bowl-shaped opening 70 in a side view of FIG. 4A and a front view of FIG. 4B are defined. It is set.

  Accordingly, when the mammo 22 placed on the upper surface 66 of the spacer main body 64 is compressed and held by the compression plate 34, the spacer main body 64, and the imaging table 32, as shown in FIGS. Is pushed along the inclined portion 76 and the vertical portions 78 and 80, and is pushed into the space inside the opening 70 formed by the inclined portion 76, the vertical portions 78 and 80, and the imaging table 32. Fixed to. In this way, by swelling the space with a part of the mammo 22, it is possible to reliably fix even a relatively small mammo 22 as compared with the conventional air gap method.

  In addition, the thickness of the mammo 22 after the compression can be increased by bulging the space with a part of the mammo 22, whereby the needle tip of the biopsy needle 58 does not penetrate from the mammo 22 and the Tissue can be collected.

  Further, the inclined portion 76 is formed inward of the opening 70, and the vertical portion 78 and the vertical portion 80 that are continuous with the inclined portion 76 are formed along the compression direction. The connection portion (side) with the upper surface 66 and the connection portion between the inclined portion 76 and the vertical portion 78 are not right-angle portions. As a result, it is possible to relieve the pain felt by the subject 20 when the mammo 22 is compressed in the compression direction and a part of the mammo 22 is pushed into the space.

  Therefore, when the biopsy spacer 10 according to the present embodiment is used, even when the mammo 22 is thin when compressed, the tissue of the biopsy site 36 can be collected by reliably compressing and holding the mammo 22. In addition, the pain felt by the subject 20 during compression can be relieved.

  Further, since the height C of the vertical portion 80 is set lower than the height D of the three surfaces 75 and higher than the height B of the vertical portion 78 (C <D and C> B), The vertical part 80 functions as a bank against the mammo 22 in a compressed state. As a result, while the pain felt by the subject 20 at the time of compression can be eased, the displacement of the mammo 22 at the time of compression and the removal of the mammo 22 in the direction (Y direction) intersecting the compression direction can be prevented.

  Furthermore, the vertical portions 78 and 80, the sides constituting the inclined portion 76 and the vertical portions 78 and 80, and the sides of the upper surface 66 and the connecting portion of the side surfaces may come into contact with the mammo 22 and the subject 20 during compression. Therefore, the pain felt by the subject 20 can be reduced by chamfering these portions. At that time, if the height B of the vertical portion 78 is 4 mm or less, the pain can be further alleviated.

  Further, if the opening 70 (the hole 81 constituting the opening) is rectangular in plan view, the opening 70 can be easily formed.

  Furthermore, by disposing the adhesive member 74 on the bottom surface 68, the spacer main body 64 can be detachably attached to the imaging table 32. Further, by providing the handle 72 on the spacer main body 64, the spacer main body 64 can be easily carried and the spacer main body 64 attached to the photographing table 32 can be easily peeled off.

  When biopsy is performed in the mammography apparatus 12, first, the radiation source is accommodated around the hinge portion 42 in a state where the mammo 22 is compressed and held by the compression plate 34, the biopsy spacer 10 and the imaging table 32. After rotating the unit 28 and arranging the radiation source 26 at a position inclined obliquely with respect to the Z-axis direction, stereo imaging for irradiating the mammo 22 with the radiation 24 is performed. Thereby, the solid state detector 30 detects the radiation 24 that has passed through the mammo 22 and converts it into a radiation image (stereo image). Next, in a console (not shown), the three-dimensional coordinate position of the biopsy site 36 is calculated based on the stereo image. Next, the biopsy hand unit 38 operates the first arm 54 and the second arm 56 based on the three-dimensional coordinate position to move the biopsy needle 58 in the XY plane, while opening the biopsy needle 58. The tissue of the biopsy site 36 is sampled by the sampling unit 60 by puncturing the mammo 22 via the unit 50.

  Therefore, by configuring the spacer body 64 from a material that can prevent the radiation 24 from being scattered, a high-quality stereo image can be obtained in the above stereo imaging, and as a result, a biopsy site is obtained based on the stereo image. 36 three-dimensional coordinate positions can be accurately obtained. If the spacer body 64 can be cleaned, the biopsy spacer 10 can be maintained in a clean state.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

  For example, it is possible to compress and hold the mammo 22 using the biopsy spacers 10a to 10c shown in FIGS. 7A to 8.

  The biopsy spacer 10a of FIG. 7A is different from the biopsy spacer 10 (see FIGS. 2 to 6B) in that the width of the inclined portion 76 is narrow and the vertical portions 78 and 80 are substantially the same height. . 7B is different from the biopsy spacer 10 in that the vertical portions 78 and 80 have substantially the same height. Furthermore, the biopsy spacer 10c of FIG. 8 differs from the biopsy spacer 10 in that the width of the inclined portion 76 is narrow. In these biopsy spacers 10a to 10c, the same effect is obtained with respect to the configuration common to the biopsy spacer 10.

  Further, the mammo 22 may be compressed and held using the biopsy spacer 10d shown in FIGS. 9 to 12B.

  The biopsy spacer 10d is configured by laminating two spacer bodies 64 and 84 in order in the arrow Z direction.

  In this case, the spacer body 84 on the upper layer side is made of the same material as the spacer body 64 on the lower layer side, and the thickness, width, and depth thereof are substantially the same as the thickness, width, and depth of the spacer body 64, respectively. Also, in the spacer main body 84, a portion that may come into contact with the subject 20 and the mammo 22 when the mammo 22 is compressed is chamfered. Further, a bowl-shaped opening portion is formed on the chest wall 48 (see FIGS. 2 and 6A) side of the spacer body 84 from the upper surface 86 toward the bottom surface 88, and this opening portion is formed on the chest wall 48 side of the spacer body 64. It communicates with the opening. Furthermore, the spacer main body 84 does not have a bank against the compressed mammo 22 like the vertical portion 80, and has a substantially U-shaped shape in which the chest wall 48 side is a cutout portion.

  That is, in the biopsy spacer 10 d, the opening 70 is defined by three surfaces 100 formed from the upper surface (one surface) 86 to the bottom surface 88 of the spacer body 84 and the four surfaces 75 and 79 of the spacer body 64. ing. In this case, each of the three surfaces 100 includes an inclined portion 96 inclined from the upper surface 86 toward the inside of the opening 70, and a vertical portion 98 formed between the inclined portion 96 and the bottom surface 88. Yes.

  Here, when the two spacer bodies 64 and 84 are laminated, the inclined portions 76 and 96 are substantially flush with each other, and the two inclined portions 76 and 96 that are continuous along the pressing direction constitute one surface. In addition, it is desirable that the vertical portions 78 and 98 are formed substantially in parallel along the arrow Z direction. In this case, the inclined portions 76 and 96 constituting one surface are substantially flush. When the two spacer bodies 64 and 84 are stacked, the inclined portions 76 and 96 are in a straight line, or the inclined portions 76 and 96 are parallel to each other, but due to the presence of the vertical portion 98, a slight step (a step of about several mm, preferably a step of about 2 to 3 mm) is formed between the inclined portions 76 and 96. Say. 9 and 12B show a case where there is a slight step.

  Therefore, when the two spacer bodies 64 and 84 are laminated, the bowl-shaped opening 70 can be formed by the three surfaces 100 and the four surfaces 75 and 79. Further, a handle 92 for a doctor or engineer to grip the spacer body 84 is provided at a position away from the opening 70 on the bottom surface 88 of the spacer body 84.

  Note that the place where the handle 92 is provided is not limited to the place shown in FIG. 11, and is provided at a place where the subject 20 and the mammo 22 do not come into contact with the mammo 22 as in the case of the handle 72. Just do it. Further, two adhesive members 94 having the same function as the adhesive member 74 are disposed on the bottom surface 88 in order to attach (laminate) the spacer body 84 to the spacer body 64 in a peelable manner.

  Furthermore, two pin members (convex members, positioning portions) 104 having a substantially spherical tip and made of SUS (stainless steel) or the like are disposed at a position near the handle 92 on the bottom surface 88 of the spacer body 84. On the other hand, two concave portions (positioning portions) 102 that can be fitted to the two pin members 104 are formed on the upper surface 66 of the spacer body 64. Accordingly, when the pin members 104 are press-fitted into the recesses 102 and fitted, the spacer bodies 64 and 84 are stacked with the spacer body 84 positioned relative to the spacer body 64 as shown in FIG. 12A. Can do.

  In the biopsy spacer 10d configured as described above, a doctor or an engineer prepares two spacer bodies 64 and 84 in advance, and uses only one spacer body 64 according to the shape and size of the mammo 22. Alternatively, the two spacer bodies 64 and 84 may be stacked and used. As a result, the height of the biopsy spacer 10d can be easily adjusted, and the usability of the biopsy spacer 10d is improved.

  9 to 12B, the two spacer main bodies 64 and 84 are stacked to form the biopsy spacer 10d. However, another spacer main body is further stacked on the upper surface 86 of the spacer main body 84, and three spacer main bodies 64 and 84 are stacked. Of course, the same effect can be obtained even if the biopsy spacer 10d is composed of the above spacer body.

  Further, in the biopsy spacer 10d, the inclined portions 76 and 96 that are continuous in the compression direction of the mammo 22 are formed so as to be substantially flush with each other, so that the mammo 22 is pressed and a part of the mammo 22 is opened. The pain felt by the subject 20 can be alleviated when squeezed into the inner space 70.

  Further, by fitting (pressing and fixing) the pin member 104 and the recessed portion 102, the spacer main bodies 64 and 84 are stacked in a positioned state, and therefore, when the mammo 22 is compressed, an arrow orthogonal to the compression direction. The positional displacement of the spacer body 84 with respect to the spacer body 64 due to the stress acting in the X direction (left and right direction) and the arrow Y direction (depth direction) can be effectively suppressed. The stress is a stress that tends to spread in the left-right direction and the depth direction due to the pressure when the mammo 22 is compressed.

  If two magnets are provided on the upper surface 66 of the spacer main body 64 and the bottom surface 88 of the spacer main body 84 in place of the two pin members 104 and the two concave portions 102 so that the magnets attract each other, The positional deviation of the spacer body 84 with respect to the spacer body 64 can be effectively suppressed. Alternatively, if the two pin members 104 are magnets and a magnet is provided in the recess 102, the spacer bodies 64 and 84 can be positioned reliably.

  Furthermore, if two adhesive members 94 for adhering to the upper surface 66 of the spacer main body 64 are provided on the bottom surface 88 of the spacer main body 84, the spacer main body 84 can be attached to the spacer main body 64 in a peelable manner. It becomes possible.

  Further, the mammo 22 may be compressed and held using the biopsy spacer 10e shown in FIGS.

  The biopsy spacer 10e is formed on the distal side of the subject 20 in the spacer main body 84 with a concave portion 108 connected to the inclined portion 96 and recessed toward the spacer main body 64. 9 to FIG. 12B).

  That is, the recess 108 is provided between the two pin members 104 on the distal side of the subject 20 in the spacer main body 84. In this case, the recess 108 is provided by forming the two inclined portions 106 facing each other on the distal side of the subject 20 in the spacer body 84. The recess 108 desirably has a lateral width of 80 mm or more and a depth of about 8 mm, for example. Further, in the biopsy spacer 10e, the two pin members 104 and the two recesses 102 may be provided so as to be shifted from each other (both sides of the spacer body 84) in order to secure the lateral width of the recess 108.

  By providing the recess 108 in this manner, it is difficult to secure a space for providing the handle 92 on the distal side of the subject 20 in the spacer body 84. Therefore, in the biopsy spacer 10e, the handles 110 are provided on both sides of the spacer main body 84.

  Here, when two or more spacer main bodies 64 and 84 are laminated, a part of the mammo 22 swells deeply in the space inside the opening 70 as compared with the case where one spacer main body 64 is used. Even if a doctor or an engineer puts his hand in the opening 70 to perform the positioning, the positioning may not be easily performed.

  Therefore, by providing the concave portion 108 connected to the inclined portion 96 on the distal side of the subject 20 in the spacer main body 84, even when two or more spacer main bodies 64, 84 are stacked, the doctor or engineer can intervene through the concave portion 108. Thus, it becomes easy to put the hand into the opening 70, and the mammo 22 can be positioned easily.

DESCRIPTION OF SYMBOLS 10, 10a-10e ... Biopsy spacer 12 ... Mammography apparatus 20 ... Subject 22 ... Mammo 24 ... Radiation 32 ... Imaging stand 34 ... Compression plate 36 ... Biopsy site 48 ... Chest wall 50, 70 ... Opening 58 ... Biopsy needle 60 ... collecting parts 64, 84 ... spacer main bodies 66,86 ... upper face 68,88 ... bottom face 72,92,110 ... handles 74,94 ... adhesive members 75, 79,100 ... faces 76, 96,106 ... inclined parts 78,80 98 ... Vertical part 81 ... Hole 102, 108 ... Concave 104 ... Pin member

Claims (15)

In the biopsy spacer in which an opening penetrating from one surface to the other surface of the spacer main body on which a living body inspection object is placed is formed,
Of the surfaces defining the opening, at least two surfaces are:
An inclined portion formed on the one surface side and inclined toward the inside of the opening;
A biopsy spacer, characterized in that a vertical portion is formed on the other surface side and along the compression direction of the inspection object from the one surface toward the other surface. The spacer according to claim 1,
The opening is defined by the at least two surfaces and the living body side surface,
The surface on the living body side is composed only of a vertical part formed along the compression direction of the inspection object,
The biopsy spacer, wherein a height of the surface on the living body along the compression direction is lower than a height of the at least two surfaces along the compression direction. The spacer according to claim 2,
Each of the vertical portions is chamfered, and a biopsy spacer. In the spacer according to any one of claims 1 to 3,
The biopsy spacer, wherein a height of the vertical portion constituting the at least two surfaces along the compression direction is 4 mm or less. The spacer according to any one of claims 1 to 4,
The biopsy spacer is configured by forming the opening in one spacer body, or at least two spacer bodies are stacked along the compression direction so as to penetrate each spacer body. The biopsy spacer is formed by forming the opening in the biopsy spacer. The spacer according to claim 5,
When the spacer bodies are stacked, the vertical portion is formed on the bottom surface side of the lower-layer side spacer body, and the inclined portion is substantially flush from the upper-layer side spacer body to the vertical portion. A biopsy spacer characterized by being formed. The spacer according to claim 6,
Positioning portions for positioning and laminating the spacer bodies are provided on the bottom surface of the upper spacer body and the upper surface of the lower spacer body, respectively. . The spacer according to claim 7,
Each positioning part is
A convex member provided on the bottom surface of the upper spacer body and a concave portion provided on the upper surface of the lower spacer body and fitted into the convex member;
Alternatively, the biopsy spacer is a magnet provided on the bottom surface of the upper spacer body and the upper surface of the lower spacer body. The spacer according to any one of claims 6 to 8,
A biopsy spacer, characterized in that an adhesive member for adhering to the upper surface of the lower spacer body is disposed on the bottom surface of the upper spacer body. The spacer according to any one of claims 6 to 9,
A biopsy spacer characterized in that a concave portion connected to the inclined portion and recessed toward the lower-layer side spacer main body is provided on the distal side of the living body in the upper-layer side spacer main body. . In the spacer according to any one of claims 1 to 10,
The biopsy spacer, wherein the opening is rectangular in plan view. The spacer according to any one of claims 1 to 11,
A biopsy spacer, wherein a portion of the spacer main body that may come into contact with the inspection object is chamfered. In the spacer according to any one of claims 1 to 12,
The spacer body is made of a material that prevents scattering of radiation and is washable. The spacer according to any one of claims 1 to 13,
A biopsy spacer, wherein an adhesive member is disposed on the other surface. The spacer according to any one of claims 1 to 14,
A spacer for a biopsy, wherein a handle is provided in a portion of the spacer body that does not come into contact with the living body and the inspection object when the inspection object is compressed.

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