The helical scan doing the suffering inspection body difference

摘要

PROBLEM TO BE SOLVED: To obtain an accurate contrast image by producing a differential image based on substantial difference between data of an identical position of a subject obtained by a plurality of continuous scanning. ;SOLUTION: Fluoroscopic data of a subject are collected through a detector array of a two-row detector array by helical scanning and stored in a memory 7. An image reorganization device of a central processing unit 3(CPU) reorganizes a CT image of the subject using the measurement data stored in the memory 7. Differential calculation is carried out by the CPU 3 between a stored image in an image buffer and an image of the identical section after one scanning time. The differential calculation is carried out on every corresponding picture elements to form the differential image. The differential image represents a change amount of an identical section within one scanning time. Thereby, an image of a part not filled with a contrasting agent is completely removed to enable to obtain an accurate contrast image.;COPYRIGHT: (C)1997,JPO