PROBLEM TO BE SOLVED: To provide an X-ray CT system by which a proper scanogram image can be acquired by expanding the photographing range of the scanogram image.SOLUTION: This X-ray CT system includes: an X-ray source 101S which irradiates a subject with X ray an X-ray detecting instrument 106S which is arranged to be confronted with the X-ray source, and detects the X ray which has permeated the subject a bed 105 which moves the subject who is arranged between the X-ray source and the X-ray detecting instrument in the body axial direction of the subject and a scanogram image forming means which makes the X-ray source cast the X ray to the subject, collects the X ray permeated the subject which has been detected by the X-ray detecting instrument as X-ray permeation data, and forms the scanogram image of the subject conforming to the collected X-ray permeation data. The scanogram image forming means controls the timing for collecting the X-ray permeation data in response to the moving speed of the bed.COPYRIGHT: (C)2011,JPO&INPIT【課題】スキャノグラム像の撮影範囲を広くし、適切なスキャノグラム像を取得できるX線CT装置を提供する。【解決手段】被検体にX線を照射するX線源101Sと、X線源に対向配置され、被検体を透過したX線を検出するX線検出器106Sと、X線源とX線検出器の間に配置される被検体を被検体の体軸方向に移動させる寝台105と、被検体の体軸方向に寝台を移動させながら、X線源から被検体にX線を照射させ、X線検出器により検出された被検体を透過したX線をX線透過データとして収集し、収集されたX線透過データに基づいて被検体のスキャノグラム像を生成するスキャノグラム像生成手段を備える。スキャノグラム像生成手段は寝台の移動速度に応じてX線透過データを収集するタイミングを制御する。【選択図】図4
