MAMMOGRAPHY APPARATUS
FIG13 is a diagram illustrating a position of a top of the recess
In the first embodiment, when seen from the contact face 23, it is sufficient if the shape of the recess 35 is convex toward the upper face 21, but it is preferable that not only the shape of the recess 35 is convex toward the upper face 21, but also, as shown in FIG13, the top T1 of the recess 35 (that is the top T1 of the boundary line 36 between the recess 35 and the contact face 23) is disposed nearly at the center between the first side face 26A and the second side face 26B. That is, it is preferable that the top T1 is disposed on a line 77 on which the distance from the first side face 26A and the distance from the second side face 26B are approximately the same, on the contact face 23. In this way, in a case where the top T1 of the recess 35 is disposed at the center between the first side face 26A and the second side face 26B, as the chest wall 61 is in contact with the contact face 23, the subject 60 is easily guided (so-called centering) to the center of the imaging stand 13. Accordingly, in a case where the CC imaging and the MLO imaging are respectively performed with respect to the left and right breasts 62L and 62R, the subject 60 is placed at an approximately determined position with respect to the imaging stand 13 in any imaging.
diagram
35
recess
77
line
22
lower face
34
fourth ridge portion
31
first ridge portion
33
third ridge portion
81
X-ray image
21
upper face
36
boundary line
23
contact face
32
second ridge portion
13
imaging stand
['1. A mammography apparatus (10) comprising: an X-ray irradiation section (12) that irradiates an X-ray imaging panel (41) with X-rays; and an imaging stand (13) that includes the X-ray imaging panel and a control circuit (42, 43A, 43B) of the X-ray imaging panel, and is provided with an upper face (21) on which a breast of a subject is placed, a lower face (22) that is opposite to the upper face, a contact face (23) that is connected to the upper face and the lower face and comes in contact with a chest wall of the subject, a first side face (26A) and a second side face (26B) that are connected to the upper face, the lower face, and the contact face, and a recess (35) formed by cutting out at least a part of the contact face, wherein the recess has a shape in which among a first ridge portion (31) where the contact face and the upper face are connected to each other, a second ridge portion (32) where the contact face and the lower face are connected to each other, a third ridge portion (33) where the contact face and the first side face are connected to each other, and a fourth ridge portion (34) where the contact face and the second side face are connected to each other,  characterized in that  at least a part of the second ridge portion is cut out, and the first ridge portion, the third ridge portion, and the fourth ridge portion are not cut out.', '5. The mammography apparatus according to any one of claims 1 to 4, wherein a top of a boundary line between the recess and the contact face is disposed at the center between the first side face and the second side face, when seen from the contact face.']