Title :
Estimation and Removal of Physiological Noise from Undersampled Multi-slice fMRI data in Image Space
Author :
Wang, S.J. ; Luo, L.M. ; Liang, X.Y. ; Gui, Z.G. ; Chen, C.X.
Author_Institution :
Dept. of Biol. & Medical Eng., Southeast Univ., Nanjing
Abstract :
The signal variations induced by respiration and cardiac motion decrease the statistical significance in functional MRI data analysis. Significant components of these fluctuations are aliased into the activation spectrum in standard multi-slice imaging protocols. A method of estimation and removal physiological noise in image space is reported. Based on reordering the data from slice ordering to time ordering, the aliased physiological information is available in multi-slice magnitude images. Then physiological noise can be estimated and removed adaptively using signal projecting technique with the actual functional signal preserved
Keywords :
biomedical MRI; fluctuations; image denoising; medical image processing; cardiac motion; fluctuations; image space; multislice magnitude images; physiological noise estimation; physiological noise removal; respiration; signal projecting technique; signal variations; slice ordering; time ordering; undersampled multislice fMRI; Biomedical monitoring; Data analysis; Fluctuations; Frequency; Heart beat; Image sampling; Magnetic resonance imaging; Protocols; Sampling methods; Working environment noise; data analysis; functional MRI; physiological noise;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1616683
