Combined radio frequency coil with integral magnetic field shim

Details Combined radio frequency coil with integral magnetic field shim Combined radio frequency coil with integral magnetic field shim

1995-04-13

1996-08-27

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, G01V 300

Patent

active

055504728

ABSTRACT:
A toroidal housing (18), such as a vacuum dewar, contains magnets (10, 12) for generating a temporally constant magnetic field through a central bore (14). Gradient coils (32, 42) are mounted around the bore defining a space therebetween. A radio frequency shield (78) is disposed radially inward from the gradient coils. Inside the radio frequency shield, an inner shimming assembly (60) includes a dielectric cylinder (62) having annular grooves around its periphery. Segmented ferrous material (66) is arranged in annular rings in the grooves. The ferrous material is segmented into small pieces electrically insulated from each other to limit radio frequency and gradient frequency eddy currents. A radio frequency coil (70) is mounted inside of the annular ferrous shims (66). Preferably, additional shim trays (50) which carry shims (54) are mounted in the space between the primary and secondary gradient coils.

REFERENCES:
patent: 4587504 (1986-05-01), Brown et al.
patent: 4698611 (1987-10-01), Vermilyea
patent: 4733189 (1988-03-01), Punchard et al.
patent: 4737716 (1988-04-01), Roemer et al.
patent: 4771243 (1988-09-01), Vreugdenhil et al.
patent: 4853663 (1989-08-01), Vermilyea
patent: 4990877 (1991-02-01), Benesch
patent: 5045794 (1991-09-01), Dorri et al.
patent: 5179338 (1993-01-01), Laskaris et al.
patent: 5235284 (1994-08-01), Tahara et al.
patent: 5349297 (1994-09-01), DeMeester et al.
patent: 5406204 (1995-04-01), Morich et al.

Affiliated with

Also associated with

Rating

Combined radio frequency coil with integral magnetic field shim does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined radio frequency coil with integral magnetic field shim , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined radio frequency coil with integral magnetic field shim will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1058323