A patients pain is eliminated and very high diagnostic accuracy is ensured with lower doses of radiation in mammography equipment including: a suction cup (1) having a suction recess (4) disposed, on its interior surface, for being drawn into intimate contact with a chest of the patient (20) a suction member (2) allowing the breast (21) to be drawn from the chest and protruded into the recess (4) in an uncompressed state and a CT scanner (3) having a storage space (5) to accommodate the suction cup (1) inside and serving to obtain a tomographic image of the breast (21). The breast (21) placed in the storage space (5) via the suction cup (1) is irradiated with the radiation over a plane orthogonal to a protruding direction of the breast (21), and a coronal cross-section image of the breast (21) is obtained in a scanning direction along the protruding direction.
