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Proceedings Paper

Advanced MRI reconstruction toolbox with accelerating on GPU
Author(s): Xiao-Long Wu; Yue Zhuo; Jiading Gai; Fan Lam; Maojing Fu; Justin P. Haldar; Wen-Mei Hwu; Zhi-Pei Liang; Bradley P. Sutton
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Paper Abstract

In this paper, we present a fast iterative magnetic resonance imaging (MRI) reconstruction algorithm taking advantage of the prevailing GPGPU programming paradigm. In clinical environment, MRI reconstruction is usually performed via fast Fourier transform (FFT). However, imaging artifacts (i.e. signal loss) resulting from susceptibility-induced magnetic field inhomogeneities degrade the quality of reconstructed images. These artifacts must be addressed using accurate modeling of the physics of the system coupled with iterative reconstruction. We have developed a reconstruction algorithm with improved image quality at the expense of computation time and hence an implementation on GPUs achieving significant speedup. In this work, we extend our previous work on GPU implementation by adding several new features. First, we enable Sensitivity Encoding for Fast MRI (SENSE) reconstruction (from data acquired using a multi-receiver coil array) which can reduce the acquisition time. Besides, we have implemented a GPU-based total variation regularization in our SENSE reconstruction framework. In this paper, we describe the different optimizations employed from levels of algorithm, program code structures, and specific architecture performance tuning, featuring both our MRI reconstruction algorithm and GPU hardware specifics. Results show that the current GPU implementation produces accurate image estimates while significantly accelerating the reconstruction.

Paper Details

Date Published: 25 January 2011
PDF: 10 pages
Proc. SPIE 7872, Parallel Processing for Imaging Applications, 78720Q (25 January 2011); doi: 10.1117/12.872204
Show Author Affiliations
Xiao-Long Wu, Univ. of Illinois at Urbana-Champaign (United States)
Yue Zhuo, Univ. of Illinois at Urbana-Champaign (United States)
Jiading Gai, Beckman Institute, Univ. of Illinois at Urbana-Champaign (United States)
Fan Lam, Univ. of Illinois at Urbana-Champaign (United States)
Maojing Fu, Univ. of Illinois at Urbana-Champaign (United States)
Justin P. Haldar, Univ. of Illinois at Urbana-Champaign (United States)
Wen-Mei Hwu, Univ. of Illinois at Urbana-Champaign (United States)
Zhi-Pei Liang, Univ. of Illinois at Urbana-Champaign (United States)
Bradley P. Sutton, Univ. of Illinois at Urbana-Champaign (United States)


Published in SPIE Proceedings Vol. 7872:
Parallel Processing for Imaging Applications
John D. Owens; I-Jong Lin; Yu-Jin Zhang; Giordano B. Beretta, Editor(s)

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