| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a computed tomography for always accurately estimating a projection position in the rotary center axis of a specimen without using any exclusive phantom or the like and hence without being affected by the manufacturing precision of the phantom. <P>SOLUTION: By using X-ray transmission data for 360°in an arbitrary specimen W and by utilizing that the degree of matching of data that differ by 180°is high at a projecting position in the rotation axis, an element corresponding to the projection position onto the light reception surface of an X-ray detector 2 in the rotary axis Ra of the specimen W is obtained. By using the X-ray transmission data for 360°with an arbitrary object as the specimen, the projection position of the rotational center axis can be estimated stably and accurately, thus eliminating an estimation error in the projection position of the rotational center axis caused by manufacturing errors in such a component as the phantom and achieving stable high quality in sectional images. <P>COPYRIGHT: (C)2004,JPO</p> |
