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Correction of distortions due to the pulsed magnetic field gradient-induced shift in B0 field by postprocessing
1Service Hospitalier Frédéric Joliot, Département de Biologie, Commissariat à L'Energie Atomique, Orsay, France.
Magnetic Resonance in Medicine
|November 1, 1989
Abstract:
Gradient pulses used in most localization techniques induce time-dependent shifts in B0 that strongly distort NMR signals. A postprocessing correction method requiring no additional hardware is proposed. The phase shift produced by the B0 shift is calculated from a reference free induction decay (FID) and used to correct any FID acquired with the same sequence.