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 when the signal is acquired. The stray fields can be measured empirically with cardiac tags.
Lee
James N
JN
University of Utah, School of Medicine, Department of Radiology, Salt Lake City 84132, USA. jim@doug.med.utah.edu
Rock Hadley
J
J
Steckner
Michael C
MC
D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008280:Magnetics; D019047:Phantoms, Imaging