TY - GEN
T1 - Reducing temporal fluctuations in MRI with the multi-channel method SENSE
AU - Moeller, Steen
AU - Van De Moortele, Pierre Francois
AU - Goerke, Ute
AU - Uǧurbil, Kâmil
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
KW - Multi-channel reconstruction
KW - Temporal noise reduction
UR - http://www.scopus.com/inward/record.url?scp=33745420216&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745420216&partnerID=8YFLogxK
U2 - 10.1117/12.654263
DO - 10.1117/12.654263
M3 - Conference contribution
AN - SCOPUS:33745420216
SN - 0819461857
SN - 9780819461858
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Medical Imaging 2006
T2 - Medical Imaging 2006: Physics of Medical Imaging
Y2 - 12 February 2006 through 16 February 2006
ER -