| 摘要 |
PROBLEM TO BE SOLVED: To enable a balancing of a rotatable measuring apparatus to be performed easily and to be performed as automatically as possible so that no particular expert is required for a process of the balancing. SOLUTION: The image forming tomography apparatus, particularly an X-ray CT apparatus or an ultrasonic tomography apparatus is so constituted as to be equipped with a fixed side unit (1) having measuring means (13a and 13b) to measure an unbalance, a ring-type measuring apparatus (3) is attached to the fixed side unit (1) to be rotatable around a patient inspection space (9), and balance weights (17a and 17b) to compensate the unbalance are disposed on the measuring apparatus (3), wherein the balance weights (17a and 17b) are attached to an outer peripheral surface (15) of the measuring apparatus (3) with mutually changeable angular position in a rotation path extending in the direction of rotation (a) on two parallel planes (E1 and E2) separated mutually in an axial direction and the two balance weights (17a and 17b) are disposed on each of the planes (E1 and E2). COPYRIGHT: (C)2005,JPO&NCIPI
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