RADIATION TOMOGRAPHY APPARATUS, ITS TOMOGRAPHIC METHOD AND CORRECTION DATA CALCULATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a radiation tomography apparatus which can prevent the artifact generation by a cross talk in a tomogram and can improve the image quality of the tomogram, its tomographic method and a correction data calculation method.

SOLUTION: A slope phantom P including a conical section is disposed between an X-ray tube 20 and an X-ray detector 23 in the manner that a circle center axis of the conical section corresponds to a slice thickness direction z, and a phantom tomogram generating section 53a generates the tomogram of the slope phantom P on the basis of the projection data of the disposed slope phantom P. Then, correction data calculation section 53 calculates the correction data to correct the projection data of a subject 6 in the slice thickness direction z on the basis of the tomogram of the slope phantom generated by the phantom tomogram generating section 53a, and a correction section 54 corrects the projection data of the subject on the basis of the correction data.

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