Reducing temporal fluctuations in MRI with the multichannel method SENSE

Steen Moeller; Pierre-Francois Van de Moortele; Ute Goerke; Kâmil Uğurbil

doi:10.1117/12.654263

2 March 2006 Reducing temporal fluctuations in MRI with the multichannel method SENSE

Steen Moeller, Pierre-Francois Van de Moortele, Ute Goerke, Kâmil Uğurbil

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 61420P (2006) https://doi.org/10.1117/12.654263
Event: Medical Imaging, 2006, San Diego, California, United States

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.

Citation Download Citation

Steen Moeller, Pierre-Francois Van de Moortele, Ute Goerke, and Kâmil Uğurbil "Reducing temporal fluctuations in MRI with the multichannel method SENSE", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61420P (2 March 2006); https://doi.org/10.1117/12.654263

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