PROBLEM TO BE SOLVED: To provide a method for reconstructing a three dimensional image based on a limited field of view and at least one corrective parameter.SOLUTION: A system of X-ray imaging includes an X-ray emitter that projects X-rays. An X-ray receiver receives X-rays from the X-ray emitter to produce a plurality of projection images. A filter with at least one filter leaf absorbs at least a portion of the X-rays from the X-ray emitter to define a limited field of view within a full field of view with the X-rays being attenuated in at least one attenuated portion of the full field of view. A processor reconstructs a three dimensional image based upon the projection images of the full field of view. The limited field view is located within the reconstructed three dimensional image. At least one corrective parameter is determined from the reconstructed three dimensional image.SELECTED DRAWING: None【課題】限定照射野及び少なくとも１つの補正パラメータに基づいて三次元画像を再構成する方法を提供する。【解決手段】Ｘ線撮影システムは、Ｘ線を照射するＸ線エミッタを有し、Ｘ線レシーバは、このＸ線エミッタからＸ線を受け取り、複数の投影画像を生成し、少なくとも１つのフィルタリーフを有するフィルタによってＸ線エミッタからのＸ線の少なくとも一部を吸収し、全照射野の一部分でＸ線を減衰し、全照射野内に限定照射野を構成し、全照射野の投影画像に基づいて、プロセッサによって三次元画像が再構成され、限定照射野は再構成された三次元画像内に位置づけられ、再構成された三次元画像から少なくとも１つの補正パラメータが定義される。【選択図】なし
