Effects of static and radiofrequency magnetic field inhomogeneity in ultra-high field magnetic resonance imaging.
Journal Article (Journal Article)
To characterize the severe static (B(0)) and radiofrequency (B(1)) magnetic field inhomogeneity in ultra-high field (> or =7 T) magnetic resonance imaging, gradient echo (GE) and spin echo (SE) images of in vivo and postmortem human brains were acquired. The B(0) and B(1) inhomogeneity were experimentally mapped and/or numerically simulated, and correlated with the image artifacts. Whereas B(0) inhomogeneity affects predominantly GE images near air/tissue interfaces, B(1) inhomogeneity affects SE images more severely and shows non-intuitive patterns. Mapping of the B(0) and B(1) inhomogeneity is important in characterizing image artifacts. This will help develop better B(0) and B(1) inhomogeneity correction methods.
- Truong, T-K; Chakeres, DW; Beversdorf, DQ; Scharre, DW; Schmalbrock, P
- February 2006
Volume / Issue
- 24 / 2
Start / End Page
- 103 - 112
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)