Image reconstruction and scan configurations enabled by optimization-based algorithms in multispectral CT

Physics in Medicine and Biology
Buxin ChenXiaochuan Pan

Abstract

Optimization-based algorithms for image reconstruction in multispectral (or photon-counting) computed tomography (MCT) remains a topic of active research. The challenge of optimization-based image reconstruction in MCT stems from the inherently non-linear data model that can lead to a non-convex optimization program for which no mathematically exact solver seems to exist for achieving globally optimal solutions. In this work, based upon a non-linear data model, we design a non-convex optimization program, derive its first-order-optimality conditions, and propose an algorithm to solve the program for image reconstruction in MCT. In addition to consideration of image reconstruction for the standard scan configuration, the emphasis is on investigating the algorithm's potential for enabling non-standard scan configurations with no or minimum hardware modification to existing CT systems, which has potential practical implications for lowered hardware cost, enhanced scanning flexibility, and reduced imaging dose/time in MCT. Numerical studies are carried out for verification of the algorithm and its implementation, and for a preliminary demonstration and characterization of the algorithm in reconstructing images and in enabling non-s...Continue Reading

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Citations

Dec 19, 2018·Physics in Medicine and Biology·Steven TilleyJ Webster Stayman
Feb 12, 2020·Physics in Medicine and Biology·Yi XueTianye Niu
Mar 9, 2018·Medical Physics·Buxin ChenXiaochuan Pan
Nov 23, 2018·Physics in Medicine and Biology·Cyril MorySimon Rit
Oct 13, 2020·Journal of X-ray Science and Technology·Temitope E KomolafeXiaodong Yang
May 29, 2020·Physics in Medicine and Biology·Wenjuan ShengMengfei Li
Dec 30, 2020·Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society·Buxin ChenXiaochuan Pan
Jan 27, 2021·Physics in Medicine and Biology·Shusen ZhaoXing Zhao
Aug 13, 2021·Physics in Medicine and Biology·Yizhong WangBin Yan
Jul 29, 2021·Physics in Medicine and Biology·Buxin ChenXiaochuan Pan

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