Patent ID: 8285023

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 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 will have successive addresses, 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 will have successive addresses, and saving the second volume data in memory as third retention data in such a way that pixel data in a plane parallel to a third plane will have successive addresses, wherein the first plane is perpendicular to the direction of the rotation axis, the second plane is parallel to the direction of the rotation axis and the third plane is parallel to the direction of the rotation axis and perpendicular to the second plane; a calculation step of performing planar reconstruction calculation using the first retention data to generate a cross section image in the first plane, performing planar reconstruction calculation using the second retention data to generate a cross section image in the second plane and performing planar reconstruction calculation using the third retention data to generate a cross section image in the third plane; and a display step of displaying the cross section images obtained by the planar reconstruction calculation on a display apparatus.