| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a computerized tomography for accurately estimating a projection position onto an X-ray detector at a rotary center axis and greatly contributing to the improvement of a tomographic image by placing an arbitrary object on a turntable , rotating the object, and sampling X-ray transmission data without using any exclusive phantoms. <P>SOLUTION: The computerized tomography has a rotary center axis projection position estimation means 53 that changes a rotary center axis projection position used for converting X-ray transmission data rows detected by the X-ray detector 2 in a plurality of times to parallel projection data rows, and estimates the rotary center axis projection position based on each data row being converted by using each rotary center axis projection position. The tomogram is reconfigured by the data rows being converted by using the estimated rotary center axis projection position, thus obtaining the stable, high-quality sectional image without being affected by manufacturing errors in the phantoms. <P>COPYRIGHT: (C)2004,JPO</p> |
