Magnetic resonance imaging systems

Details Magnetic resonance imaging systems Magnetic resonance imaging systems

1986-06-03

1988-03-22

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324320, G01R 3320

Patent

active

047331895

ABSTRACT:
Novel apparatus and methods for magnetic resonance imaging are disclosed which improve imaging speed and resolution as well as increase efficiency, particularly in superconducting systems. In one aspect of the invention, it has been discovered that the eddy currents and harmonics which normally interfere with MRI operations can be suppressed by the construction of an active shield about the gradient-forming components of the system. The active shield, for example, can be implemented by another set of coils, placed between the gradient coils and the cryostat in a superconducting MRI system to zero particular harmonics and prevent eddy currents in the cryostat shells. By employing a set of active secondary coils the problems associated with eddy currents induced by the gradient producing coils are substantially controlled.

REFERENCES:
patent: 4275323 (1981-06-01), Hatch
patent: 4449097 (1984-05-01), Young et al.
patent: 4486711 (1984-12-01), Frese et al.
patent: 4585995 (1986-04-01), Flugan
Bradley et al., "Physical Principles of Nuclear Magnetic Resonance", vol. 2, Modern Neuroradiology: Advance Imaging Techniques, pp. 15-61, (Newton & Potts, Ed., Clavadel Press, San Anselmo, California 1983).

Affiliated with

Also associated with

Rating

Magnetic resonance imaging systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic resonance imaging systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic resonance imaging systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-444461