Patent ID: 8891727

Claim:
A radiation imaging apparatus comprising: a radiation source configured to emit radiation to a target for imaging from a first focal point corresponding to a radiation focal point; a plurality of radiation detecting elements disposed opposite to the radiation source and arranged in a channel direction; a plurality of collimator plates provided along the channel direction on detection surface sides of the radiation detecting elements so as to separate the radiation detecting elements in the channel direction, the collimator plates including radiation absorption members at surfaces of at least one first collimator plate located on a first end side of the collimator plates and at least one second collimator plate located on a second end side of the collimator plates such that radiation shielding effects of the first and second collimator plates become substantially equivalent when the surfaces of the first and second collimator plates are located along a radial direction from a second focal point different from the first focal point; and a data acquisition unit configured to acquire radiation projection data for image reconstruction from the radiation detecting elements.