Radiation imaging apparatus, radiation imaging method, body movement measuring method, and body movement measuring program

摘要

A radiation detector is moved along a predetermined axis of movement. Radiation which has passed through a subject is irradiated onto the radiation detector each time the position of the radiation detector changes due to the movement. Signals are read out from the radiation detector each time that radiation is irradiated, to obtain a plurality of radiation images of the subject. Mechanical errors of the radiation detector are detected at each imaging operation, and mechanical error corrected images in which the mechanical errors are corrected are obtained. Amounts of shift of the subject among the mechanical error corrected images are detected, and amounts of movement of the subject during imaging operations are detected based on the amounts of shift.

主权项

1. A radiation imaging apparatus, comprising:
an imaging means for irradiating radiation; a radiation detector for detecting the radiation of a subject positioned between the irradiating radiation and the radiation detector; and a moving means for moving the imaging means and/or the radiation detector; the radiation imaging apparatus being configured to perform a plurality of imaging operations of a subject by moving the imaging means and/or the radiation detector; and the radiation imaging apparatus further comprising:
image obtaining means for reading out signals from the radiation detector each time the radiation detector is moved and the radiation is irradiated, to obtain a plurality of images of the subject;a mechanical error detecting means for detecting mechanical errors of the imaging means and/or the radiation detector; andbody movement obtaining means for obtaining the amounts of body movement of the subject during the imaging operations, based on the mechanical errors obtained by the mechanical error detecting means, wherein the radiation imaging apparatus moves the radiation detector, irradiates radiation which has passed through the subject onto the radiation detector each time that the position of the radiation detector changes by being moved, and obtains a plurality of radiation images, at least portions thereof being overlapped, wherein the imaging means moves the radiation detector along a predetermined axis of movement and irradiates radiation which has passed through the subject onto the radiation detector each time that the position of the radiation detector changes due to the movement and wherein the radiation imaging apparatus further comprises:
a mechanical error correcting means for correcting the mechanical errors in the plurality of radiation images, to obtain mechanical error corrected radiation images; anda shift detecting means, for detecting amounts of shift in the subject among the mechanical error corrected radiation images, and wherein the body movement obtaining means obtains the amounts of body movement of the subject during the imaging operations, based on the amounts of shift, wherein mechanical error includes inclinations of an imaging surface.