Document Type
Conference Proceeding
Language
eng
Publication Date
5-2010
Publisher
International Society for Magnetic Resonance in Medicine
Source Publication
Proceedings of the International Society for Magnetic Resonance in Medicine Scientific Meeting and Exhibition
Source ISSN
1545-4428
Abstract
Estimations of main magnetic field inhomogeneity are often acquired for correction of image warping in echo planar images (EPI) resulting from vulnerability to off-resonance effects of EPI. Many established methods exist for field estimation, one of which involves two EPI acquisitions with different echo times. The method is fast, easily implemented and can be performed in-line with fMRI experiments. However, inconsistencies in the MRI scanner hardware, specifically with the RF pulse, as well as physiologic phenomena that alter the off-resonance characteristics between image acquisitions such as motion or respiration can induce errors in field maps estimated in this manner.
Recommended Citation
Hahn, Andrew D.; Nencka, Andrew S.; and Rowe, Daniel B., "In fMRI a Dual Echo Time EPI Pulse Sequence can Induce Sources of Error in Dynamic Magnetic Field Maps" (2010). Mathematics, Statistics and Computer Science Faculty Research and Publications. 111.
https://epublications.marquette.edu/mscs_fac/111
Comments
Published version. Published as part of the proceedings of the conference. Joint Annual Meeting ISMRM- ESMRMB in Stockholm, Sweden, 2010. Permalink.© 2010 International Society for Magnetic Resonance in Medicine. Used with permission.