TRANS-AXIAL TRUNCATION COMPENSATION FOR CT IMAGING

Original (Chinese)

Imaging apparatuses described herein include a radiation source configured for imaging radiation, a radiation detector positioned to receive radiation from the radiation source, and an image processing system. The image processing system is configured to: receive projection data from the radiation detector, the projection data corresponding to a scan field-of-view (scanFOV), the image being trans-axially truncated; identify a final reconstruction field-of-view (reconFOV) that is larger than the scanFOV; reconstruct an image having a reconstruction field-of-view (reconFOV), wherein reconFOVis less than reconFOV; generate a progressive refinement for the image; reproject the image with the progressive refinement thereby generating a virtual scan vscanFOV; refine the virtual scan vscanFOVdata; and repeat the reconstruction, generation of the progressive refinement, and reprojection for one or more subsequent reconstructions until reconFOV is reached.