| 摘要 |
Provided is a radiation phase difference imaging apparatus in which a separation distance between a phase grating and a radiation detector is optimized. That is, according to the present invention, the separation distance between the phase grating 5 and a detection surface 4a of an FPD 4 is determined based on the magnitude of noise corruption in a self-image projected onto the detection surface 4a. In other words, in the configuration of the present invention, the magnitude of the effect of the noise is used as a basis for assessing the separation distance. According to the present invention, it is determined whether a distance Zd is appropriate for imaging, based on the magnitude of noise corruption in the self-image in a self-image picture which is obtained when the distance Zd is the distance between the phase grating 5 and the detection surface 4a of the FPD 4. The separation distance can thus be optimized based on actual conditions of an actual X-ray source 3 that emits a plurality of types of X-rays. |
