Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1995-06-13
1997-04-15
Snow, Walter E.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324322, G01R 3320
Patent
active
056213239
ABSTRACT:
A coil element, comprising a quadrature surface coil, includes side by side loops, slightly overlapped to the degree necessary to cancel mutual inductance. A coil includes a split-capacitor configuration for balanced-to-unbalanced conversion between the coil and a coaxial cable, without interfering with the highly magnetic environment of a magnetic resonance imaging system. A coil includes multiple diodes and current stabilizing impedances in parallel, or alternatively a combination of a fast low-power PIN diode and a slow high-power diode to effectively multiply the power handling capability of fast diodes for passive decoupling in a decoupling circuit for reducing the risk to the patient over active decoupling. A coil includes a counter-rotating decoupling circuit to cancel the effects of decoupler radiation, and to prevent lowering of the quality factor of the decoupling circuit and the detection of undesirable image artifacts. A coil includes a capacitor and decoupling circuit opposite that of the primary tuning and decoupling circuit for increased symmetry during the imaging cycle receive and transmit phases.
REFERENCES:
patent: 4126823 (1978-11-01), Dalton, Jr.
patent: 4408162 (1983-10-01), Egger
patent: 4564812 (1986-01-01), Van Dijk
patent: 4620155 (1986-10-01), Edelstein
patent: 4684895 (1987-08-01), Misic
patent: 4717881 (1988-01-01), Flugan
patent: 4728896 (1988-03-01), Bendall et al.
patent: 4739271 (1988-04-01), Haase
patent: 4782298 (1988-11-01), Arakawa et al.
patent: 4788503 (1988-11-01), Va Heelsbergen
patent: 4801885 (1989-01-01), Meissner
patent: 4839594 (1989-06-01), Misic et al.
patent: 4855680 (1989-08-01), Arakawa et al.
patent: 4866387 (1989-09-01), Hyde
patent: 4974113 (1990-11-01), Gabrielge et al.
patent: 5136244 (1992-08-01), Jones et al.
patent: 5144240 (1992-09-01), Mehdizadeh et al.
patent: 5166618 (1992-11-01), Jones et al.
patent: 5256971 (1993-10-01), Boskamp
patent: 5256972 (1993-10-01), Keren et al.
patent: 5278505 (1994-01-01), Arakawa
Drucker I. Morley
Kimbell Daniel R.
Magnetic Research, Inc.
Mah Raymond Y.
Snow Walter E.
LandOfFree
Surface coil elements does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface coil elements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface coil elements will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-363614