Measuring magnetic fields generated by DC currents in receive-only coils

DC decoupling currents applied to receive-only coils during radiofrequency transmission can create stray magnetic fields capable of changing the resonant frequency of nearby nuclei. It is difficult to measure these fields with conventional field-mapping techniques because the fields are not present...

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Bibliographic Details
Published in:Magnetic resonance imaging 2002-10, Vol.20 (8), p.607-610
Main Authors: Lee, James N, Rock Hadley, J, Steckner, Michael C
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cardiac tag
Coil
Investigative techniques, diagnostic techniques (general aspects)
Magnetic Resonance Imaging - instrumentation
Magnetics
Medical sciences
Miscellaneous. Technology
Nervous system
Phantoms, Imaging
Phased-array
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Receive-only
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Summary:DC decoupling currents applied to receive-only coils during radiofrequency transmission can create stray magnetic fields capable of changing the resonant frequency of nearby nuclei. It is difficult to measure these fields with conventional field-mapping techniques because the fields are not present when the signal is acquired. The stray fields can be measured empirically with cardiac tags.
ISSN:0730-725X
1873-5894
DOI:10.1016/S0730-725X(02)00532-5