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- Title
Eddy current effects on a clinical 7T-68Â cm bore scanner.
- Authors
Kickler, Nils; van der Zwaag, Wietske; Mekle, Ralf; Kober, Tobias; Marques, Jose P.; Krueger, Gunnar; Gruetter, Rolf
- Abstract
Introduction Eddy currents induced by switching of magnetic field gradients can lead to distortions in short echo-time spectroscopy or diffusion weighted imaging. In small bore magnets, such as human head-only systems, minimization of eddy current effects is more demanding because of the proximity of the gradient coil to conducting structures. Methods In the present study, the eddy current behavior achievable on a recently installed 7 tesla--68 cm bore head-only magnet was characterized. Results Residual effects after compensation were shown to be on the same order of magnitude as those measured on two whole body systems (3 and 4.7 T), while using two to three fold increased gradient slewrates.
- Subjects
MAGNETIC fields; SPECTRUM analysis; EDDY currents (Electric); MAGNETS; MAGNETICS
- Publication
MAGMA: Magnetic Resonance Materials in Physics, Biology & Medicine, 2010, Vol 23, Issue 1, p39
- ISSN
0968-5243
- Publication type
Article
- DOI
10.1007/s10334-009-0192-0