PROBLEM TO BE SOLVED: To reduce time necessary for changing scan direction when forward scanning and reverse scanning are repeated.SOLUTION: The X-ray CT apparatus has a top board, rotation driving means, travel driving means and control means. An analyte is placed on the top board. The rotation driving means rotates an X-ray tube along a circular orbit surrounding the analyte. The travel driving means causes the top board to continuously travel back and forth in a first direction and in a second direction opposite to the first direction in the longitudinal direction of the top board while the rotation driving means rotates the X-ray tube. The control means controls the X-ray tube in such a manner that a position of the X-ray tube on the circular orbit at a start time of X-ray irradiation by the X-ray tube in travelling in the first direction and a position of the X-ray tube on the circular orbit at a start time of X-ray irradiation by the X-ray tube in travelling in the second direction can be differentiated.COPYRIGHT: (C)2014,JPO&INPIT【課題】往路スキャンと復路スキャンとを折り返す際の折り返し時間を削減すること。【解決手段】実施形態に係るX線CT装置は、天板と、回転駆動手段と、移動駆動手段と、制御手段とを具備する。天板は、被検体を載置する。回転駆動手段は、X線管を、前記被検体を囲む円軌道上で回転させる。移動駆動手段は、前記回転駆動手段により前記X線管を回転させながら前記天板を、当該天板の長手方向における第一方向および当該第一方向と反対方向の第二方向に連続して往復移動させる。制御手段は、前記第一方向への移動において前記X線管がX線の照射を開始する際の前記円軌道上の位置と、前記第二方向への移動において前記X線管がX線の照射を開始する際の前記円軌道上の位置とを相違可能に前記X線管を制御する。【選択図】図1
