Four‐dimensional cone beam CT reconstruction and enhancement using a temporal nonlocal means method
Four‐dimensional cone beam CT reconstruction and enhancement using a temporal nonlocal means method
Four-dimensional Cone Beam Computed Tomography (4D-CBCT) has been developed to provide respiratory phase resolved volumetric imaging in image guided radiation therapy (IGRT). Inadequate number of projections in each phase bin results in low quality 4D-CBCT images with obvious streaking artifacts. In this work, we propose two novel 4D-CBCT algorithms: an …