Temporal Resolution Improvement in Single Source and Dual Source CT

Purpose: Recently a new method called TRIPICCS (Temporal Resolution Improved Prior Image Constrained Compressed Sensing) was proposed to improve the temporal resolution of a single source (SS) cardiac CT scan [1] (figures 1+2). This method aims at doubling the temporal resolution and at maintaining homogeneous temporal resolution independently of the location and the motion direction of a vessel. The aims of our study are two-fold. First we independently evaluate TRI-PICCS regarding the reported improvements and then we extend the algorithm to dual source CT and evaluate the results there as well. TRI-PICCS is compared with a standard short scan reconstruction regarding two properties: The temporal resolution (TR) and the dependency of the TR on the motion direction of a vessel (=reproducibility). Both properties are evaluated as a function of the position within the field of measurement (FOM).