JP2011212111A - Compression paddle and x-ray imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent displacement of a breast during imaging by arranging a slip reducing portion on the side of the breast bottom of a surface opposed to an imaging surface.SOLUTION: The slip reducing portion 60 is formed on the surface 52A opposed to the imaging surface in a compression paddle 50. The slip reducing portion 60 is formed on one end side adjacent to a chest wall portion 54 of the surface 52A opposed to the imaging surface. The slip reducing portion 60 is so constructed that its slipperiness when it abuts on the breast N is lower than the other parts of the surface 52A opposed to the imaging surface (parts in which the slip reducing portion 60 is not formed), in other words, the breast N is slip-proof.

Description

  The present invention relates to a medical X-ray imaging apparatus and a compression plate used for the X-ray imaging apparatus.

  As one of medical X-ray imaging apparatuses, there is an X-ray imaging apparatus (mammography) that images a subject's breast. In this X-ray imaging apparatus for imaging the breast, X-ray imaging is performed by pressing the breast with a compression plate. When compressing the breast with a compression plate, the laboratory technician positions the breast.However, because of the pain caused by the compression, the test subject escapes away from the imaging table and the breast is misaligned and positioning is difficult. There is a possibility that the position of the breast is shifted after positioning and an appropriate image cannot be obtained.

  For example, in patent documents 1-3, in order to relieve the pain by a test subject's compression, the elastic body pad is stuck on the compression board. Certainly, the subject's pain is alleviated by the elastic pad, but since the breast is elastically held, there is a problem that the position of the breast is shifted between positioning and photographing. In addition, since the elastic pad is attached to the entire compression surface, the X-ray transmittance is reduced by the elastic pad, and when photographing with the same amount of X-rays, the image quality is deteriorated. Since the dose must be increased, there is a problem that the amount of exposure of the subject increases.

Special table 2005-523043 US6577702 US69668033

  The present invention has been made in consideration of the above-described facts, and provides a compression plate capable of suppressing breast positional deviation during imaging and an X-ray imaging apparatus using the compression plate. Let it be an issue.

  In order to solve the above-mentioned problem, the compression plate according to claim 1 is a compression plate that presses the breast between the imaging surface on the imaging table on which the breast of the subject abuts and presses against the breast. A photographing facing surface that presses against the breast by sandwiching from the side facing the photographing surface, and a slip between the photographing facing surface and the breast is provided at one end side of the breast on the root side of the breast. A slip reduction portion to be reduced is formed.

  The compression plate according to claim 1 compresses the subject's breast while sandwiching it between the imaging surface of the imaging table. When the breast is sandwiched and compressed in this way, first, the root side of the breast is sandwiched and positioned, and the entire surface of the breast is positioned starting from this position, and the imaging surface of the imaging table and the imaging opposing surface of the compression plate Between them.

  At this time, since the slip reduction portion is formed on the root side of the breast on the imaging facing surface, it is possible to suppress the positional deviation on the root side of the breast after positioning. In addition, since the slip reduction portion is formed at one end of the breast on the imaging facing surface, the X-ray transmittance in the case of X-ray imaging is compared with that formed on the entire imaging facing surface. The decrease can be suppressed.

  The compression plate according to claim 2 includes a chest wall portion that is continuously formed from the imaging facing surface and abuts against the chest of the subject, and the slip reduction portion is formed at a boundary portion with the chest wall portion. It is characterized by this.

  Since the compression plate has the chest wall, the chest of the subject does not cover the imaging surface, and X-ray imaging of the breast can be performed appropriately. Further, by forming the slip reduction portion at the boundary portion between the chest wall portion of the compression plate and the imaging facing surface, the influence of the slip reduction portion on the captured image can be suppressed.

The compression plate according to a third aspect is characterized in that the slip reduction portion is further formed to extend from the imaging facing surface to the chest wall portion.
As described above, the slip reduction portion extends from the imaging facing surface to the chest wall portion through the boundary portion between the chest wall portion and the imaging facing surface, thereby more reliably suppressing the positional deviation on the root side of the breast after positioning. be able to.

The compression plate according to claim 4 is characterized in that the slip reduction part is formed of a member containing a silicon material.
As described above, the slip can be suitably reduced by using the silicon material. In addition, as formation of the slip reduction part with a silicon material, you may affix and form a tape-shaped silicon member, and you may form by apply | coating a silicon paint.

  The compression plate according to claim 5 is characterized in that the slip reduction portion is formed by subjecting the photographing facing surface to an uneven process.

  As described above, the unevenness processing is performed on the photographing facing surface, so that the slip can be suitably reduced.

  The X-ray imaging apparatus according to claim 6 is an X-ray source that irradiates a subject's breast with X-rays, an imaging table having an imaging surface with which the breast abuts, and any one of claims 1 to 5. A compression plate as described.

  According to the X-ray imaging apparatus of the sixth aspect, since the slip reduction portion is formed on the compression plate, it is possible to perform appropriate X-ray imaging by suppressing positional deviation on the root side of the breast after positioning. Can do. In addition, since the slip reduction portion is formed at one end of the breast on the imaging facing surface, the X-ray transmittance in the case of X-ray imaging is compared with that formed on the entire imaging facing surface. The decrease can be suppressed.

  According to the present invention, it is possible to suppress a breast position shift during imaging.

It is a perspective view of the X-ray imaging device concerning this embodiment. It is a top view which shows the state by which the test subject's breast was positioned by the X-ray imaging device which concerns on this embodiment. It is a perspective view of a compression board concerning this embodiment, (A) is a state where a photography counter surface is facing down, and (B) is a perspective view in a state where a photography opposition surface is facing up. It is a side view of the compression board concerning this embodiment. It is a figure which shows the state by which the breast was contact | abutted to the imaging surface of the X-ray imaging device which concerns on this embodiment. It is a figure which shows the state which positioned the base side of the breast with the compression board of the X-ray imaging device which concerns on this embodiment. It is a figure which shows the state by which the whole breast was compressed and positioned with the compression board of the X-ray imaging device which concerns on this embodiment. It is a perspective view of the compression board which concerns on the modification of this embodiment, (A) is a state with the imaging opposing surface facing down, (B) is a perspective view with the imaging opposing surface facing upward. It is a side view of the compression board which concerns on the modification of this embodiment.

Hereinafter, embodiments will be described and embodiments of the present invention will be described.
First, the first embodiment will be described. FIG. 1 is a perspective view of an X-ray imaging apparatus (mammography) 10 according to the present embodiment. The X-ray imaging apparatus 10 is an apparatus for imaging a breast of a standing subject W (see FIG. 2) with X-rays, and includes a measurement unit 12 and a base unit 14. Note that the X-ray imaging apparatus 10 of the present embodiment is an apparatus that can perform both CC (Cranio & Caudal) imaging and MLO (inside / outside oblique direction: Media-Lateral-Oblique) imaging. ing.

  The measurement unit 12 is provided on the front side of the apparatus and has a substantially U-shape when viewed from the side. The base unit 14 is installed in a standing state, and supports the measurement unit 12 from behind. The measurement unit 12 is provided with a rotation shaft 16 that extends to the back surface and is rotatably supported by the base portion 14. Measurement is performed by the rotation shaft 16 being supported by the base portion 14. The part 12 is rotatably supported by the base part 14.

  The measurement unit 12 includes an imaging table 22 and a support unit 28. The support portion 28 is substantially L-shaped in a side view, one side of the L-shape (the middle support portion 27) is disposed along the base portion 14, and the other side of the L-shape (upper support portion 26) is the X-ray. It arrange | positions so that it may extend toward the front side of the imaging device 10. FIG.

  An imaging table 22 is connected to an end portion of the support portion 28 opposite to the upper support portion 26. The imaging table 22 extends toward the front side of the X-ray imaging apparatus 10 and is disposed so as to face the upper support portion 26 with a predetermined distance. On the side facing the upper support portion 26 of the imaging table 22, a planar imaging surface 20 is formed that contacts at least the breast N (see FIG. 2) of the subject W (patient) whose upper body is standing.

  A radiation irradiation unit 24 is provided on the distal end side of the upper support unit 26 so as to face the imaging table 22. The radiation irradiation unit 24 includes an X-ray tube (not shown), and X-rays for inspection are irradiated from the X-ray tube toward the imaging surface 20.

  A compression plate 50 is held on the front side of the middle support portion 27 via a holding member 32. The holding member 32 is movable along a guide groove 27 </ b> A formed in the middle support portion 27. Thereby, the distance of the compression board 50 and the imaging surface 20 is made variable.

  The middle support portion 27 is formed with a pair of handles 36 that the subject W holds with both hands during CC imaging so as to sandwich the imaging surface 20. The handle 36 is fixed to the side surface of the middle support portion 27 and extends toward the front side of the X-ray imaging apparatus 10. The grip portion 36 </ b> A that constitutes the handle 36 and is gripped by the subject W is a substantially straight rod-shaped portion that is inclined to the side opposite to the subject side (that is, the back side for the subject) with respect to the normal line of the imaging surface 20. As it gets closer, it is arranged to gradually approach the subject W side.

  On the front side (subject side) of the imaging table 22 is provided a chest wall abutting portion 30 that abuts the chest portion below the breast N of the subject W (see FIG. 5) during CC imaging. In addition, a radiation detector 40 (see FIG. 5) that is irradiated with X-rays that have passed through the imaging surface 20 is provided inside the imaging table 22.

  As shown in FIG. 3A, the compression plate 50 has a shallow tray shape, and includes an imaging facing portion 52, a chest wall portion 54, a side wall portion 56, and a mounting wall portion 58. The photographing facing portion 52 is disposed so as to face the photographing surface 20, and a photographing facing surface 52A is formed on the photographing surface 20 side. The imaging facing surface 52A comes into contact with the breast N from the side facing the imaging surface 20 and sandwiches the breast N between the imaging surface 20 and presses the breast N. The chest wall portion 54 is continuously formed on the front side of the imaging table 22 of the imaging facing portion 52 (on the side opposite to the middle support portion 27) by being bent so as to be orthogonal to the imaging facing portion 52. The chest wall 54 is in contact with the chest portion above the breast N of the subject W (see FIG. 7) during CC imaging.

  The side wall portions 56 are continuously formed by being bent so as to be orthogonal to the imaging facing portion 52 at both sides sandwiching the imaging facing portion 52 when viewed from the front side of the imaging table 22. The attachment wall portion 58 is continuously formed by being bent so as to be orthogonal to the photographing facing portion 52 on the back side (the middle support portion side) of the photographing stand 22 of the photographing facing portion 52. An arm 34 that connects the compression plate 50 and the holding member 32 is attached to the outside of the central portion of the attachment wall portion 58.

  As shown in FIG. 3B, a slip reduction portion 60 is formed on the photographing facing surface 52A. The slip reduction portion 60 is formed on one end side adjacent to the chest wall portion 54 of the imaging facing surface 52A. The slip reduction unit 60 is less slippery in a state of being in contact with the breast N than the other part of the imaging facing surface 52A (the part where the slip reduction part 60 is not formed), that is, the breast N is configured to be difficult to slide.

  As the slip reduction unit 60, a resin material having a high friction coefficient, a resin material having adhesiveness, or the like can be used. For example, it can be composed of a silicon material, and can be composed by applying a silicon tape or applying a silicon paint. The slip reduction unit 60 can also be formed by forming irregularities on the surface of the photographing facing surface 52A or performing a roughening process.

  As shown in FIG. 3B, in the slip reduction unit 60, the length S in the direction along the chest wall 54 is preferably a length that covers the entire side of the imaging facing surface 52A. In addition, the width W1 in the direction along the side wall portion 56 is preferably 1 mm for the lower limit to obtain a sufficient slip reduction effect, and the upper limit for the width W1 in the image (about 5 mm). Further, the thickness H (see FIG. 5) of the slip reduction portion 60 is 0.5 mm or less in order not to feel discomfort or pain due to a step when silicon tape is applied or silicon paint is applied. Preferably, when the surface is roughened, the lower limit of the surface roughness is 0.1 mm in order to obtain a sufficient slip reduction effect, and the upper limit is 0.5 mm or less in order not to feel discomfort or pain due to steps. It is preferable that

(Function, effect)
Hereinafter, the operation and effect of the present embodiment will be described. In addition, for convenience of explanation, explanation will be given with CC photography, but the same operation and effect are obtained with MLO photography.

  As shown in FIG. 5, the subject W places the breast N on the imaging table 22 of the X-ray imaging apparatus 10 and makes the breast N abut on the imaging surface 20 when undergoing examination by CC imaging. In this state, the compression plate 50 is moved toward the imaging surface 20. Then, as shown in FIG. 6, the chest wall portion 54 of the compression plate 50 and the corner portion of the imaging facing portion 52 are brought into contact with the root side of the breast N, and the root side of the breast N is pressed against the imaging surface 20, Perform positioning. Further, the compression plate 50 is moved toward the imaging surface 20, and the breast N is sandwiched between the imaging surface 20 and the imaging facing surface 52A and positioned while positioning from the root side of the breast N toward the distal end side (see FIG. (See FIG. 7).

  In the present embodiment, since the slip reduction portion 60 is formed on the imaging facing surface 52A, after positioning the root side of the breast N, the positional displacement of the breast N, particularly the near side from the imaging table 22 (the direction in which the subject escapes). ) Can be suppressed. Further, since the slip reduction unit 60 is formed on one end side of the breast N at the base side, the position shift of the first positioning portion of the breast N is suppressed, and positioning of the distal end side of the breast N is facilitated.

In addition, the slip reduction unit 60 is not formed on the entire imaging facing surface 52A, but only on one side of the chest wall 54 side, so that a decrease in the transmittance of the imaging facing unit 52 for X-rays is suppressed. can do.

In the present embodiment, the slip reduction portion is formed only on the imaging facing surface 52A. However, the slip reduction portion extends from the imaging facing surface 52A to the outer surface of the chest wall portion 54 as shown in FIGS. Alternatively, the slip reduction portion 61 may be formed. In this way, by extending the slip reduction unit 61 to the chest wall portion 54, it is possible to suppress slipping of the subject's chest that is in contact with the chest wall portion 54, and the positional deviation on the root side of the breast N after positioning is determined. It can suppress more reliably.
In this case, the length S of the slip reduction portion 61 in the direction along the chest wall portion 54 is a length that covers the entire side of the imaging facing surface 52A in order to maintain a high degree of freedom in positioning the breast N. preferable. Further, the extension length E to the chest wall portion 54 may cover the entire height of the chest wall portion 54, or as shown in FIGS. 8 and 9, the height direction of the chest wall portion 54 It may be extended only to a part of.

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

DESCRIPTION OF SYMBOLS 10 X-ray imaging device 20 Imaging surface 22 Imaging stand 40 Radiation detector 50 Compression board 52 Image | photographing opposing part 52A Image | photographing opposing surface 54 Chest wall part 60, 61 Slip reduction part

Claims (6)

A compression plate that compresses the breast by sandwiching it between the imaging surface on the imaging table where the breast of the subject abuts,
An imaging facing surface that abuts on the breast and presses against the breast by being sandwiched from the side facing the imaging surface,
A compression plate, wherein a slip reduction portion that reduces slippage between the imaging facing surface and the breast is formed at one end side of the breast facing side of the imaging facing surface. Comprising a chest wall portion configured continuously from the imaging facing surface and in contact with the chest of the subject;
The compression plate according to claim 1, wherein the slip reduction part is formed at a boundary part with the chest wall part.   The compression plate according to claim 2, wherein the slip reduction part is further formed to extend from the imaging facing surface to the chest wall part.   The compression plate according to any one of claims 1 to 3, wherein the slip reduction part is formed of a member containing a silicon material.   The compression plate according to any one of claims 1 to 4, wherein the slip reduction part is formed by subjecting the imaging facing surface to an uneven process. An X-ray source that irradiates the subject's breast with X-rays;
An imaging table having an imaging surface with which the breast abuts;
A compression plate according to any one of claims 1 to 5;
An X-ray imaging apparatus comprising:

Images