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3D spiral cardiac/respiratory ordered fMRI data acquisition at 3 Tesla
Author(s) -
Stenger V. Andrew,
Peltier Scott,
Boada Fernando E.,
Noll Douglas C.
Publication year - 1999
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/(sici)1522-2594(199905)41:5<983::aid-mrm18>3.0.co;2-2
Subject(s) - spiral (railway) , communication noise , functional magnetic resonance imaging , variance (accounting) , computer science , noise (video) , data acquisition , noise reduction , magnetic resonance imaging , single shot , artificial intelligence , cardiac magnetic resonance imaging , pattern recognition (psychology) , medicine , image (mathematics) , mathematics , physics , radiology , mathematical analysis , philosophy , linguistics , business , operating system , optics , accounting
Three‐dimensional (3D), multi‐shot functional magnetic resonance imaging (fMRI) data acquisitions are desirable because of higher resolution and reduced susceptibility artifacts, due to shorter readouts and thinner slices. However, 3D multi‐shot techniques are more susceptible to physiological noise, which can increase inter‐image variance and lead to inaccurate assessment of activation. This work presents a 3D spiral fMRI data acquisition method at 3 T in which the acquisition of views was ordered to match the phase of either the respiratory or the cardiac cycle. For the acquisition timing parameters used in this work, cardiac ordering was found to reduce inter‐image variance by 19%. Cardiac ordered data acquisitions showed the same reduction in variance as sequentially ordered data with cardiac contributions estimated and removed using an externally acquired reference prior to reconstruction. Respiratory ordering showed no reduction in fluctuation noise due to poor alignment of views to the respiratory phase. Magn Reson Med 41:983–991, 1999. © 1999 Wiley‐Liss, Inc.