Affiliation:
1. Tianjin Medical University
2. Tianjin Medical University school of stomatology
Abstract
In-line X-ray phase-contrast computed tomography typically contains two independent procedures: phase retrieval and computed tomography reconstruction, in which multi-material and streak artifacts are two important problems. To address these problems simultaneously, an accelerated 3D iterative image reconstruction algorithm is proposed. It merges the above-mentioned two procedures into one step, and establishes the data fidelity term in raw projection domain while introducing 3D total variation regularization term in image domain. Specifically, a transport-of-intensity equation (TIE)-based phase retrieval method is updated alternately for different areas of the multi-material sample. Simulation and experimental results validate the effectiveness and efficiency of the proposed algorithm.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Tianjin City
Tianjin Municipal Education Commission
Subject
Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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