PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus which can accurately align a scan cross-section position during observation with the lapse of time to a cross-section position set based on the volume data during the diagnosis.SOLUTION: The X-ray CT apparatus 1 includes: a scanning image forming part 62 during the diagnosis for forming a scanning image during the diagnosis a volume data forming part 64 for setting a scanning condition based on the scanning image and forming the volume data a cross-section position recording part 66 for recording the cross-section position set based on the volume data by a cross-section position setting part 65 into a storing apparatus a scanning image forming part 69 during observation with the lapse of time for forming the scanning image during observation with the lapse of time a positioning part 70 for positioning the scanning image during observation with the lapse of time and the scanning image during the diagnosis by moving a top board a cross-section position acquiring part 71 for acquiring the cross-section position from the storing apparatus a cross-section data forming part 73 during the lapse of time for setting a scanning condition based on the scanning image during the lapse of time and forming the cross-section image acquired and a displaying apparatus 45 for displaying the image.COPYRIGHT: (C)2013,JPO&INPIT【課題】経過観察時のスキャン断面位置を、診断時のボリュームデータを基に設定された断面位置に正確に位置合わせできるX線CT装置を提供する。【解決手段】X線CT装置1は、診断時のスキャノ画像を生成する診断時スキャノ画像生成部62と、スキャノ画像を基にスキャン条件を設定しボリュームデータを生成するボリュームデータ生成部64と、断面位置設定部65によりボリュームデータを基に設定された断面位置を記憶装置に記録する断面位置記録部66と、経過観察時のスキャノ画像を生成する経過観察時スキャノ画像生成部69と、天板を移動し経過観察時のスキャノ画像と診断時のスキャノ画像を位置合わせする位置合わせ部70と、記憶装置から断面位置を取得する断面位置取得部71と、経過観察時のスキャノ画像を基にスキャン条件を設定し取得された断面位置の画像を生成する経過観察時断面データ生成部73と、画像を表示する表示装置45とを備える。【選択図】図2
