Patent ID: 8761484

Claim:
A radiation image processing method for processing non-spiral projection data obtained by radiation imaging performed by rotating a radiation generator and a two-dimensional radiation detector relative to a subject, comprising: a reconstruction step of reconstructing the non-spiral projection data into first volume data subjected to an averaging process in a direction of a rotation axis of the rotation and reconstructing the non-spiral projection data into second volume data not subjected to the averaging process; a saving step of saving the first volume data in memory as first retention data in such a way that pixel data in a plane parallel to a first plane perpendicular to the direction of the rotation axis have successive addresses and saving the second volume data in memory as second retention data in such a way that pixel data in a plane parallel to a second plane parallel to the direction of the rotation axis have successive addresses; a calculation step of performing planar reconstruction calculation to generate cross section images in the first plane and the second plane by reading the first retention data and the second retention data; and a display step of displaying the cross section images obtained by the planar reconstruction calculation on a display apparatus, wherein resolution of the first retention data is different from resolution of the second retention data.