Pulsed gradient analysis using a dedicated magnetometer.
In magnetic resonance imaging and spectroscopy, knowledge of the magnetic field gradient behavior is very important. This work describes a simple way to characterize the temporal and spatial dependence of the main magnetic field when a gradient is switched. Records are performed with a home-built magnetometer. This device is controlled by a personal computer for recording and processing the NMR signals from an array of small probes spatially distributed and switched by the magnetometer. We present results of measurements on a 2-T superconducting magnet. These results show the residual defects of an active shielded gradient coils system.
Desgoutte
P
P
Laboratoire de Résonance Magnétique Nucléaire, UCB Lyon, Villeurbanne, France.
Chaabane
L
L
Favre
B
B
Deguin
A
A
Lapray
C
C
Briguet
A
A
D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D008280:Magnetics