CT DETECTION METHOD AND CT APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a CT detection method which reduces restriction of a system space resolution due to a focus size of a radiation source and a detector size.SOLUTION: A CT detection method comprises: a step (1) of circularly scanning a subject with an X-ray on the basis of a predetermined angular sampling value of one rotation and acquiring projection sampling data in different projection angles, the predetermined angular sampling value being larger than 1000; a step (2) of processing the projection sampling data and acquiring the projection data of plural virtual sub-focal points equivalent to a large focus radiation source of a CT system; and a step (3) of reconstituting an image on the basis of the projection data of the plurality of virtual sub-focal points.SELECTED DRAWING: Figure 2