Patent Number: 6,426,988

Title: Image processing method of X-ray CT, X-ray CT and X-ray CT image-taking recording medium

Abstract: In an image processing, a high-absorber area is set and weighting is carried out according to a length of a path through which X-rays pass in the high-absorber area, so that estimated image taking data at a portion where X-rays pass through the high-absorber area in considering a weight is obtained. Measured projection data at the portion where X-rays pass through the high-absorber area is replaced by data according to overwriting estimated projection data obtained by forward projecting the estimated image to correct and reconstitute the measured projection data. Thus, there can be obtained a corrected fault image having a reduced artifact and a high contrast, and considering the weight in the high-absorber area. Therefore, the artifact formed on the fault image due to absorption or dispersion of X-rays by an X-ray high-absorber, such as metal, can be reduced.

Inventors: Yamada; Yosihiro (Kyoto, JP), Ueno; Yoshihiro (Kusatsu, JP)

Assignee: Shimadzu Corporation

International Classification: G06T 11/00 (20060101); G06T 5/00 (20060101); A61B 006/03 ()

Expiration Date: 07/30/2010