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Evaluation of respiratory artifact correction techniques in multishot spiral functional mri using receiver operator characteristic analyses
Author(s) -
Noll Douglas C.,
Genovese Christopher R.,
Vazquez Alberto L.,
O'Brien Jennifer L.,
Eddy William F.
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.1910400417
Subject(s) - receiver operating characteristic , spiral (railway) , artifact (error) , oversampling , standard deviation , sampling (signal processing) , operator (biology) , computer science , mathematics , nuclear medicine , nuclear magnetic resonance , artificial intelligence , statistics , physics , medicine , computer vision , mathematical analysis , chemistry , computer network , biochemistry , bandwidth (computing) , repressor , transcription factor , gene , filter (signal processing)
Navigator corrections and low‐spatial frequency (LSF) over‐sampling are investigated as methods for reducing respiration‐related effects in multishot functional MRI. Both techniques take advantage of the smoothly varying or nearly constant phase variations linked to the respiration cycle. These techniques were tested in functional MRI studies with spiral k ‐space acquisitions. Receiver operator characteristic (ROC) analyses and the temporal variance averaged across the brain were used to evaluate their effectiveness. Both methods were found to increase the area under the ROC curve and to reduce the standard deviation, with the LSF oversampling method being more effective.