Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2005-12-27
2005-12-27
Shrivastav, Brij B. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S309000
Reexamination Certificate
active
06980003
ABSTRACT:
A half-volume quadrature TEM coil high field (>3 T) imaging applications. This novel coil produces a sufficiently large homogeneous B1field region for the use as a volume coil. It provides superior transmission efficiency, resulting in significantly lower power deposition, as well as greater sensitivity and improved patient comfort and accessibility compared with conventional full-volume coils. Additionally this coil compensates the RF penetration artifact that distorts high-field images recorded with linear surface and volume coils. These advantages make it potentially possible to apply the device as an efficient transmit/receive body coil at high fields, where the use of the full-volume coils is complicated by the excessive power deposition and low sensitivity.
REFERENCES:
patent: 4751464 (1988-06-01), Bridges
patent: 5210494 (1993-05-01), Brunner et al.
patent: 5744957 (1998-04-01), Vaughan, Jr.
patent: 5886596 (1999-03-01), Vaughan, Jr.
patent: 6384603 (2002-05-01), Hoult et al.
patent: 6812902 (2004-11-01), Rossman et al.
patent: 2004/0030238 (2004-02-01), Vaughan
Vaughan T, Snyder C. Adriany G, Bolinger L, Liu H, Stolpen A, Ugurbil K. The Technology and Techniques of 4T Body Imaging. Proc ISMRM, 11th Meeting, Toronto, Canada 2003, p. 425.
Ballon D, Graham MC, Miodovnik S, Koutcher JA. A 64 MHz Half-Birdcage Resonator for Clinical Imaging. J. Magn Reson 1990;90:131-140.
Oh CH, Kim SK, Yang YJ, Ahn CB. Novel Type of Quadrature Breast RF Coil with a Ladder Structure. Proc ISMRM, 6th Meeting, Sydney, Australia 1998, p. 2025.
Fujita H, Braum WO, Shvartsman SM, Brown RW, Reisker TJ, Molyneaux DA, Morich MA. An Optimized Open Quadrature RF Surface Coil. Proc ISMRM, 6th Meeting Sydney, Australia 1998, p. 645.
Jin J. Electromagnetic Analysis and Design in Magnetic Resonance Imaging. Neuman MR, editor. Boca Raton: CRC Press; 1999, pp 157-164.
Vaughan JT, Hetherington HP, Pohast GM. A Toroidal Cavity Coil for High Frequency Clinical NMR. Proc, SMR, 3rd Annual Meeting, Nice, France 1995; 2:996.
Adriany G. Yacoub E, Tkac I, Anderson P, Merkle H, Vaughan JT, Shielded Surface Coils and Halfvolume Cavity Resonators for Imaging and Spectroscopy Applications at 7 Tesla. Proc ISMRM, 8th Meeting, Denver, CO 2000, p. 563.
Chen C-N, Hoult DI, Sank VJ. Quadrature Detection Coils—A Further Sqrt(2) Improvement in Sensitivity. J. Magn Reson 1983;54:324-327.
Glover GH, Hayes CE, Pelc NJ, Edelstein WA, Mueller OM, Hart HR, Hardy CJ, O'Donnell M, Barber WD. Comparison of Linear and Circular Polarization for Magnetic Resonance Imaging. J. Magn Reson 1985;64:255-270.
Hoult DI. Sensitivity and Power Deposition in a High-Field Imaging Experiment, J. Magn Reson Imag 2000;12:46-67.
Vaughan JT, Hetherington HP, Otu JO, Pan JW, Pohost GM. Hight Frequency Volume Coils for Clinical NMR Imaging and Spectroscopy. Magn Reson Med 1994;32:206-218.
Vaughan JT, Garwood M. Collins CM, Liu W. Delabarre L, Adriany G. Andersen P. Merkle H, Goebel R, Smith MB, Ugurbil K. 7T vs. 4T:RF Power, Homogeneity, and Signal-to-Noise Comparison in Head Images. Magn Reson in Med 2001:46:24-30.
Vaughn JT. The Head Cradle: An Open Faced, High Performance TEM Coil. Proc ISMRM, 9th Meeting, Glasgow, Scotland 2001, p. 15.
Tropp J. Mutual Inductance in the Bird-Cage Resonator. J. Magn Reson 1997;126:9-17.
Hoult DI. The Principle of Reciprocity in Signal Strength Calculations—A Mathematical Guide. Concepts Magn Reson 2000:12(4):173-187.
Hayes CE, Edelstein WA, Schenick JF, Mueller OM, And Eash M, An Efficient, highly homogeneous radiofrequency coil for whole-body imaging at 1.5 T.J. Magn. Reson 1985;63:622-628.
Chen C-N, Hoult DI. Biomedical Magnetic Resonance Technology. Mould RF, editor. Bristol and Philadelphia: Institute of Physics Publishing; 1989, pp 133-140.
Avdievich NI, Krymov VN, Hetherington HP, Modified Perturbation Method for Transverse Electromagnetic (TEM) Coil Tuning and Evaluation. Magn Reson Med 2003;50:13-18.
Bogdanov G. Ludwig R. Coupled Miscrostrip Line Transverse Electromagnetic resonator Model for High-Field Magnetic Resonance Imaging. Magn Res Med 47, 579-593,2002.
Avdievich Nikolai
Kennan Richard
Peshkovsky Alexey
Albert Einstein College of Medicine of Yeshiva University
Amster Rothstein & Ebenstein LLP
LandOfFree
Open half volume quadrature transverse electromagnetic coil... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Open half volume quadrature transverse electromagnetic coil..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Open half volume quadrature transverse electromagnetic coil... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3516148