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Functional MRI of brain activation induced by scanner acoustic noise
Author(s) -
Bandettini Peter A.,
Jesmanowicz A.,
van Kylen Joel,
Birn Rasmus M.,
Hyde James S.
Publication year - 1998
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910390311
Subject(s) - scanner , subtraction , noise (video) , signal (programming language) , auditory cortex , computer science , primary motor cortex , echo planar imaging , nuclear magnetic resonance , neuroscience , magnetic resonance imaging , artificial intelligence , physics , motor cortex , image (mathematics) , medicine , psychology , mathematics , radiology , arithmetic , stimulation , programming language
A method is introduced by which brain activation caused by the acoustic noise associated with echo planar imaging (EPI) is mapped. Two types of time series were compared. The first time series, considered the “task,” involved applying only EPI gradients for 20 s without the application of RF pulses , then, without pause, starting image collection. The second, considered the “control,” involved typical sequential image acquisition without the prior gradient pulses. Subtraction of the first 5 s of the two time series revealed signal enhancement mainly in the primary auditory cortex. The technique was validated using a motor cortex task that mimicked the hypothesized scanner noise induced activation.