Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2007-08-21
2007-08-21
Arana, Louis M. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
C324S306000
Reexamination Certificate
active
11305330
ABSTRACT:
A method of nuclear magnetic resonance (NMR) imaging is proposed for the rapid detection of oscillatory motion of spins or charged particles to generate shear waves or oscillating electrical currents to induce alternating magnetic fields to the object being imaged, subjected to a fast train of radio-frequency (RF) pulses to induce within the sample a steady-state NMR signal. A scan using an NMR imaging system is carried out with a RF repetition time (TR) matched to the externally imposed oscillatory motion. Small oscillatory displacements of spins in combination with imaging gradients or oscillating magnetic fields related to charge motion generating alternating spin phase dispersions during the rf pulse train disturb the steady-state magnetization. Depending on the amount of spin-phase dispersion, the amplitude and phase of the NMR signals are modulated, generating a brightness-modulation of the reconstructed phase and amplitude images revealing mechanical or electrical properties of the object, such as stiffness or electrical impedance.
REFERENCES:
patent: 3932805 (1976-01-01), Abe et al.
patent: RE32701 (1988-06-01), Moran
patent: 5592085 (1997-01-01), Ehman
patent: 5757185 (1998-05-01), Hennig
patent: 5825186 (1998-10-01), Ehman et al.
patent: 5899858 (1999-05-01), Muthupillai et al.
patent: 5952828 (1999-09-01), Rossman et al.
patent: 5977770 (1999-11-01), Ehman
patent: 6037774 (2000-03-01), Felmlee et al.
patent: 6246895 (2001-06-01), Plewes
patent: 6486669 (2002-11-01), Sinkus et al.
patent: 6583624 (2003-06-01), Muthupillai et al.
patent: 6879155 (2005-04-01), Ehman et al.
patent: 2003/0193336 (2003-10-01), Ehman et al.
patent: WO 02/084308 (2002-10-01), None
patent: WO 2004/052169 (2004-06-01), None
H.Y. Carr, “Steady-State Free Precession in Nuclear Magnetic Resonance,” Phys. Rev. 1958, vol. 112, No. 5, Dec. 1, 1958, p. 1693-1701.
A. Oppelt, et al., “FISP: eine neue schnelle Pulssequenz für die Kernspintomographie,” Electromedia, 54 (1), 1986, p. 15-18.
Y. Zur, et al., “An Analysis of Fast Imagining Sequences with Steady-State Transverse Magnetization Refocusing,” Magn. Reson. Med., 6, 1988, p. 175-193.
S.S. Vasanawala, et al., “Fluctuating Equilibrium MRI,” Magn. Reson. Med., 42, 1999, p. 876-883.
S.S. Vasanawala, et al., “Linear Combination Steady-State Free Precession MRI,” Magn. Reson. Med., 43, 2000, p. 82-90.
S. Patz, “Some Factors that Influence the Steady State in Steady-State Free Precession,” Magn. Reson. Imaging, vol. 6, 1988, p. 405-413.
R. Muthupillai, et al.,“Magnetic Resonance Elastography by Direct Visualization of Propagating Acoustic Stain Wave,” Science, vol. 269, Sep. 29, 1995, p. 1854-1857.
R. Muthupillai, et al., “Magnetic Resonance Imaging of Transverse Acoustic Strain Waves,” Magn. Reson. Med., 1996; 36 (2), p. 266-274.
R. Sinkus, et al., “High-Resolution Tensor MR Elastography for Breast Tumour Detection,” Phys. Med. Biol., vol. 45, 2000, p. 1694-1664.
W.R. Overall, et al., “Oscillating Dual-Equilibrium Steady-State Angiography,” Magn. Reson. Med., vol. 47, 2002, p. 513-522.
M.A. Dresner, et al., “MR Elastography of the Prostate,” in: Proceedings of the 10thAnnual Meeting of ISMRM, Philadelphia, 1999, p. 526.
R. Sinkus, et al., “In-Vivo Prostate MR-Elastography,” in: Proceedings of the 11thAnnual Meeting of ISMRM, Toronto, Canada, 2003, p. 586.
J.P. Felmlee, et al., “Magnetic Resonance Elastography of the Brain: Preliminary In Vivo Results,” in: Proceedings of the 5thAnnual Meeting of ISMRM, Vancouver, Canada, 1997, p. 683.
S.A. Kruse, et al., “Palpation of the Brain Using Magnetic Resonance Elastography,” in: Proceedings of the 7thAnnual Meeting of the ISMRM, Philadelphia, 1999, p. 258.
J. Rydberg, et al., “Fast Spin-Echo Magnetic Resonance Elastography of the Brain,” in: Proceedings of the 9thAnnual Meeting of ISMRM, Glasgow, Scotland, 2001, p. 1647.
J. Braun, et al., “In Vivo Mangnetic Resonance Elastography of the Human Brain Using Ultrafast Acquisition Techniques,” in: Proceedings of the 10thAnnual Meeting of ISMRM, Honolulu, 2002, p. 2597.
M.A. Dresner, et al., “Magnetic Resonance Elastography of Skeletal Muscle,” J. Magn. Reson. Imaging, vol. 13, 2001, p. 269-276.
I. Sack, et al., “Analysis of Wave Patterns in MR Elastography of Skeletal Muscle Using Coupled Harmonic Oscillator Simulations,” Magn. Reson. Imagining, vol. 20, 2002, p. 95-104.
K. Uffman, et al., “In Vivo Determination of Biceps Elasticity with MR Elastography,” in: Proceedings of the 10thAnnual Meeting of ISMRM, Honolulu, 2002, p. 37.
A.J. Lawrence, et al., “Palpating Breast Cancer by Magnetic Resonance Elastography,” in: Proceedings of the 7thAnnual Meeting of ISMRM, Philadelphia, 1999, p. 525.
E.E.W Van Houten, et al., “Initial In Vivo Experience with Steady-State Subzone-Based MR Elastography of the Human Breast,” J. Magn. Reson. Imaging, vol 17, 2003, p. 72-85.
G.C. Scott, et al., “Measurement of Nonuniform Current Density by Magnetic Resonance,” IEEE Trans. On Med. Imaging, vol. 10, No. 3, Sep. 1991, p. 362-374.
E.J. Woo, et al., “Impedance Tomography Using Internal Current Density Distribution Measured by Nuclear Magnetic Resonance,” Proc. SPIE, vol. 2299, 1994, p. 377-385.
Bieri Oliver
Scheffler Klaus
Arana Louis M.
Natzmer Joyce von
Pequignot & Myers LLC
University of Basel
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