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Low-Dose Cone-Beam CT Iterative Reconstruction via Total Variation and Gradient Total Variation
The compressed sensing (CS) technique has been utilized to reconstruct Cone-beam computed tomography (CBCT) images via limited projection from under-sampled measurements. However, the condition of limited projection is an ill-posed problem. Since the CBCT image itself doesn't have sparse features, the total variation (TV) transform has been widely adopted in CBCT reconstruction. This method, which penalizes the weight of each voxel at a constant rate regardless of different spatial gradient,doi:10.21203/rs.3.rs-1162727/v1 fatcat:fjemvbruazgl5bylbhrlekehpm