Rapid Reconstruction of Quantitative Susceptibility Mapping via Improved ℓ0 Norm approximation

Quantitative susceptibility mapping (QSM) reconstruction is a well-known ill-posed problem. Various regularization techniques have been proposed for solving this problem. In this paper, a rapid method is proposed that uses ℓ0 norm minimization in a gradient domain. Because ℓ0 minimization is an NP-hard problem, a special alternating optimization strategy is employed to simplify the reconstruction algorithm. The proposed algorithm uses only simple point-wise multiplications and thresholding operations, and signific antly speeds up the calculation.

Source: Computers in Biology and Medicine - October 3, 2016 Category: Bioinformatics Authors: Congbo Cai, Xi Chen, Weijun Liu, Shuhui Cai, Delu Zeng, Xinghao Ding Source Type: research