PROBLEM TO BE SOLVED: To provide an image processor and an X-ray CT apparatus capable of extracting a tracheal branched part from an X-ray image and identifying the interest areas such as a heart, lung and the like by using the tracheal branched part for setting the image range and the others, and simultaneously to provide the image processor and the X-ray CT apparatus capable of setting an image restructure area by identifying the interest areas such as a heart, lung and the like.SOLUTION: It has an extraction part of a tracheal branched area for extracting the tracheal branched area from an X-ray image and an identification part of a tracheal branched part for identifying the tracheal branched part from the tracheal branched area.COPYRIGHT: (C)2012,JPO&INPIT【課題】X線像から気管分岐部を抽出し、気管分岐部を用いて心臓、肺等の関心領域を特定することにより撮像範囲等を設定することが可能な画像処理装置及びX線CT装置を提供する。また、心臓、肺等の関心領域を特定することにより画像再構成範囲を設定することが可能な画像処理装置及びX線CT装置を提供する。【解決手段】X線像から気管分岐部領域を抽出する気管分岐部領域抽出手段と、前記気管分岐部領域から気管分岐部を特定する気管分岐部特定手段と、を有する。【選択図】図1
