RF shield for RF coil contained within gradient coils of NMR ima

Details RF shield for RF coil contained within gradient coils of NMR ima RF shield for RF coil contained within gradient coils of NMR ima

1988-12-22

1989-10-03

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324300, G01R 3320

Patent

active

048719692

ABSTRACT:
An RF shield, for use between a set of gradient coils and an RF coil, is hollow formed of a single conductor sheet divided into first and second opposed halves, each having a set of conductive streamline portions with a series of nonconductive cut lines formed therebetween. Each of the cut lines is parallel to the RF current and is of a generally oval shape. Each of the shield conductor loops is further separated into a "C"-shaped conductive portion, along at least one radial line, and the C portions are then connected so as to continue shielding the RF current, yet pass gradient magnetic fields in all three mutually orthogonal directions of a Cartesian coordinate system.

REFERENCES:
patent: 4638253 (1987-01-01), Jaskolski et al.
patent: 4642569 (1987-02-01), Hayes et al.
patent: 4733189 (1988-03-01), Punchard et al.

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