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Proceedings Paper

Reducing temporal fluctuations in MRI with the multichannel method SENSE
Author(s): Steen Moeller; Pierre-Francois Van de Moortele; Ute Goerke; Kâmil Uğurbil
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Paper Abstract

Multi-channel acquisition is employed in MRI to decrease total imaging time. In this paper, artifact free images are calculated by utilizing the difference in spatial encoding of the MR signal from neighboring channels. The encoding functions are estimated in the presence of noise and motion. For fMRI studies, the temporal stability of the signal is essential, since neuronal activity in the brain is detected by probing subtle BOLD (blood oxygen level dependent) signal changes. To ensure artifact free noise representation a new type of weight is used. By effectively selecting and eliminating low SNR pixels, increased temporal stability is achieved. Using the parallel imaging method SENSE the proposed method is tested with in-vivo data to ensure noise suppression and demonstrate correct assignment of fMRI activation.

Paper Details

Date Published: 2 March 2006
PDF: 9 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61420P (2 March 2006); doi: 10.1117/12.654263
Show Author Affiliations
Steen Moeller, School of Medicine, Univ. of Minnesota (United States)
Pierre-Francois Van de Moortele, School of Medicine, Univ. of Minnesota (United States)
Ute Goerke, School of Medicine, Univ. of Minnesota (United States)
Kâmil Uğurbil, School of Medicine, Univ. of Minnesota (United States)


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

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