Pulsed field MRI system with spatial selection

Details Pulsed field MRI system with spatial selection Pulsed field MRI system with spatial selection

1992-04-27

1994-04-05

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01V 300

Patent

active

053008871

ABSTRACT:
In an MRI imaging system using a pulsed field to polarize the magnetic moments, a gradient field is applied prior to the collapse of the pulsed field. When the pulsed field turns off, the magnetic moments are spatially varying in the vicinity of the null plane of the gradient field. In one embodiment the gradient field is in quadrature with the pulsed field, enabling the imaging gradient coils to be used to provide an excited slab. In another embodiment the selection gradient field is parallel to the pulsed field and enables sharper slices by subtracting images acquired with different null planes.

REFERENCES:
patent: 4947119 (1990-08-01), Ugurbil et al.
patent: 5023554 (1991-06-01), Cho et al.

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