Non-Coplanar Cone Beam CT Reconstruction With Limited Angle of Projections Using Rigid Image Registration Facilitated Prior Image Constrained Compressed Sensing

Abstract

Non-coplanar beams are vitally important for achieving the optimal dose distributions in both cranial and many noncranial sites. Treatment verification of such beams with couch rotation/kicks, however, is a challenging problem, particularly for the application of cone beam CT (CBCT). To avoid any collision between the gantry, couch, patient, and on-board imaging system, there is often a very limited angular range available for CBCT acquisition at treatment position. The purpose of this work is to develop a non-coplanar cone beam CT (CBCT) image reconstruction method from limited angle of projections.