Total variation with modified group sparsity for CT reconstruction under low SNR

CONCLUSIONS: The proposed GOGS-TV model demonstrates its advantages to reduce stair artifacts especially in low SNR reconstruction because this new model considers both the sparsity of the gradient image and the structured sparsity. Meanwhile, the Gaussian kernel is utilized as a weighted factor that can be adapted to the global distribution.PMID:33935129 | DOI:10.3233/XST-200833

Source: Journal of X-Ray Science and Technology - May 3, 2021 Category: Radiology Authors: Lingli Zhang Source Type: research