METHOD FOR CORRECTING CENTRAL AXIS SHIFT OF X-RAY COMPUTED TOMOGRAPHY

摘要

A method for correcting a central axis of an X-ray CT apparatus is provided to obtain a clear three-dimensional image in an X-ray CT(Computed Tomography) photography by removing a blurring phenomenon. A virtual model(230) is prepared. The center of the virtual model is matched with a center(255) of a central axis(250) of an X-ray CT apparatus(200). The virtual model is arranged on the X-ray CT apparatus. The virtual model is scanned by the X-ray CT apparatus. The detector plane data is obtained. The middle plan data of the virtual model is extracted from the detector plan data. The center of the middle plane data of the virtual model is compared with the center of the detector plane data. The movement value of the middle plane data of the virtual model is obtained. The center of the central axis of the X-ray CT apparatus is corrected by using a movement value of the middle plane data.