| 摘要 |
<p>A phantom (100) is provided with: a reference marker (131, 132) at a predetermined position thereof; a positioning reference surface (112), to be placed into contact with a chest wall abutting surface of a support table (210) of a mammography apparatus; and a pattern region (140) for measuring distances from the reference surface (112), perpendicular to the reference surface (112). The amount of transmitted radiation changes within the pattern region (140) in a direction perpendicular to the reference surface (112) according to a predetermined rule. The phantom (100) is placed on the support table (210) to measure the amount of chest wall loss.</p> |
