X-RAY COMPUTED TOMOGRAPHY DEVICE (X-RAY CT DEVICE) USING SUCCESSIVE APPROXIMATION

摘要

Provided is an X-ray computed tomography image-capturing device in which spatial resolution and noise suppression in successive approximation can be improved. This X-ray computed tomography image-capturing device comprises: a forward projection means that subjects a captured image created from first projection data based on image capturing, or the captured image that has been updated, to forward projection, and creates second projection data corresponding to at least one light-beam direction; a filter processing means that executes filter processing on the second projection data, which corresponds to said at least one light-beam direction, by using at least one angle-fluctuating low-pass filter; a calculating means that calculates the difference between the first projection data and the filter-processed second projection data; and an updating means that updates the captured image by using said difference.