High resolution projection reconstruction MR imaging using FOCUSS

Sungho Tak; Jaeheung Yoo; Jong Chul Ye

doi:10.1117/12.704886

28 February 2007 High resolution projection reconstruction MR imaging using FOCUSS

Sungho Tak, Jaeheung Yoo, Jong Chul Ye

Proceedings Volume 6498, Computational Imaging V; 64981A (2007) https://doi.org/10.1117/12.704886
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States

Abstract

This paper is concerned about high resolution reconstruction of projection reconstruction MR imaging from angular under-sampled k-space data. A similar problem has been recently addressed in the framework of compressed sensing theory. Unlike the existing algorithms used in compressed sensing theory, this paper employs the FOCal Underdetermined System Solver(FOCUSS), which was originally designed for EEG and MEG source localization to obtain sparse solution by successively solving quadratic optimization. We show that FOCUSS is very effective for the projection reconstruction MRI, because the medical images are usually sparse in image domain, and the center region of the under-sampled radial k-space data still provides a meaningful low resolution image, which is essential for the convergence of FOCUSS. We applied FOCUSS for projection reconstruction MR imaging using single coil. Extensive experiments confirms that high resolution reconstruction with virtually free of angular aliasing artifacts can be obtained from severely under-sampled k-space data.

Citation Download Citation

Sungho Tak, Jaeheung Yoo, and Jong Chul Ye "High resolution projection reconstruction MR imaging using FOCUSS", Proc. SPIE 6498, Computational Imaging V, 64981A (28 February 2007); https://doi.org/10.1117/12.704886

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