Systems, methods and apparatus of an actively shielded...

Details Systems, methods and apparatus of an actively shielded... Systems, methods and apparatus of an actively shielded...

2006-08-29

2006-08-29

Arana, Louis M. (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

C335S216000

Reexamination Certificate

active

07098663

ABSTRACT:
Systems, methods and apparatus are provided through which in some embodiments drift of a magnetic field of a magnetic resonance imaging (MRI) system is reduced by including a drift compensation coil which accumulates current at a rate proportional to the decay in the primary coil via its electromagnetic mutual inductance to the primary coil. In some embodiments, the drift compensation coil includes reverse turns at an outer radius, to significantly reduce any exacerbation of the fringe field during a quench of the primary coil. In further embodiments, the actively shielded drift compensation coil is complemented with a non-coupling external disturbance shield coil.

REFERENCES:
patent: 4931735 (1990-06-01), Overweg et al.
patent: 6097187 (2000-08-01), Srivastava et al.
patent: 6563316 (2003-05-01), Schauwecker et al.
patent: 6727699 (2004-04-01), Kasten
patent: 2002/0101240 (2002-08-01), Kasten

Affiliated with

Also associated with

Rating

Systems, methods and apparatus of an actively shielded... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Systems, methods and apparatus of an actively shielded..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems, methods and apparatus of an actively shielded... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3633949