Patent ID: 7684537
Filing Date: 2010-03-23
Classification: A61B

Abstract:
1. An X-ray Computed Tomography (CT) apparatus comprising: an X-ray data collecting system comprising an X-ray generating section configured to generate X-rays and an X-ray detecting section comprising a large number of X-ray detector elements one of one-dimensionally arranged and two-dimensionally arranged, wherein said X-ray generating section faces said X-ray detecting section across a cavity, and wherein said X-ray data collecting system is oriented rotatably around a given axis; an imaging table configured to carry a subject placed thereon through the cavity along the given axis; and a scan control device configured to control said X-ray data collecting system and said imaging table to sequentially perform a first scan and a second scan with switched X-rays generated by said X-ray generating section, the first scan collecting projection data at a given position in a direction of the given axis over a given view angle sufficient for reconstruction processing for a tomographic image with first X-rays having a first energy distribution, and the second scan collecting projection data over the given view angle with second X-rays having a second energy distribution different from said first energy distribution, said scan control device further configured to control a cycle of rotation of said X-ray data collecting system such that: