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Proceedings Paper

Fast parallel MRI reconstruction using B-spline approximation (PROBER)
Author(s): Jan Petr; Jan Kybic; Václav Hlaváč; Sven Müller; Michael Bock
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Paper Abstract

Parallel MRI (pMRI) is a way to increase the speed of the MRI acquisition by combining data obtained simultaneously from several receiver coils with distinct spatial sensitivities. The measured data contains additional information about the position of the signal with respect to data obtained by a standard, uniform sensitivity coil. The idea is to speed up the acquisition by sampling more sparsely in the k-space and to compensate the data loss using the additional information obtained by a higher number of receiver coils. Most parallel reconstruction methods work in image domain and estimate the reconstruction transformation independently in each pixel. We propose an algorithm that uses B-spline functions to approximate the reconstruction map which reduces the number of parameters to estimate and makes the reconstruction faster and less sensitive to noise. The proposed method is tested on both phantom and in vivo images. The results are compared with commercial implementation of GRAPPA and SENSE algorithms in terms of time complexity and quality of the reconstruction.

Paper Details

Date Published: 2 March 2006
PDF: 12 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61423P (2 March 2006); doi: 10.1117/12.652133
Show Author Affiliations
Jan Petr, Czech Technical Univ. in Prague (Czech Republic)
Jan Kybic, Czech Technical Univ. in Prague (Czech Republic)
Václav Hlaváč, Czech Technical Univ. in Prague (Czech Republic)
Sven Müller, German Cancer Research Ctr. (Germany)
Michael Bock, German Cancer Research Ctr. (Germany)

Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

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