Patent ID: 7561657
Filing Date: 2009-07-14
Classification: A61B

Abstract:
1. An X-ray CT device comprising an X-ray source for producing an X-ray beam of a cone shape in a direction of a body axis of a subject, an X-ray detecting unit in which a plurality of detecting elements are arranged in rows along the body axis of the subject, and a reconstructing unit for performing a helical scanning operation in accordance with a relative movement and a relative rotational motion of the X-ray source and the subject, processing collected data and reconstructing an image by back-projecting the processed data, the X-ray CT device further comprising: a setting unit for making a setting of a moving speed of a bed on which the subject is positioned during the helical scanning operation; and a collection condition determining unit for determining either one of the number of collection rows of the X-ray detecting unit and an X-ray narrowing condition, based on the moving speed.