A Dynamic Prior Constrained Limited-angle 4DCT Reconstruction Method

This paper proposes a new scanning model and a novel 4DCT reconstruction algorithm for the challenging task of obtaining high-temporal-resolution 3D images of the rapidly beating heart. The proposed scanning model allows for limited-angle projections in each cardiac phase by scanning only one single beat, while the 4DCT reconstruction algorithm alternates between iterative reconstruction, deformable image registration, and prior constraints. This approach combines the advantages of iterative reconstruction, motion-compensated reconstruction, and regularization constraint reconstruction, yielding superior reconstruction quality with minimal radiation dose and high temporal resolution.