Magnetic Resonance Imaging
Method estimates nonstationary noise in functional MRI
Published in Medical Letter on the CDC and FDA, February 19th, 2006
According to recent research from the United States, "An important issue in functional MRI analysis is accurate characterization of the noise processes present in the data. While conventional fMRI noise representations often assume stationarity (or time-invariance) in the noise generating sources, such approaches may serve to suppress important dynamic information about brain function. As an alternative to these fixed temporal assumptions, we present in this paper two time-varying procedures for examining nonstationary noise structure in fMRI...
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