RADIATION IMAGING DEVICE

摘要

An X-ray tube and a flat panel X-ray detector (FPD) are constructed movable parallel to each other in the same direction along a body axis which is a longitudinal direction of a patient. The X-ray tube intermittently emits radiation and the FPD detects radiation transmitted through the patient irradiated intermittently whenever the X-ray tube and FPD move every pitch. X-ray images O 1 , O 2 , ..., O 1 , ..., and O M are decomposed for every pitch noted above. The decomposed images are composed for each projection angle to obtain projection images P 1 , P 2 and so on. Therefore, a sectional image with a long field of view in the longitudinal direction can be obtained by carrying out a reconstruction process based on the composed projection images.