Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2006-03-14
2006-03-14
Gutierrez, Diego (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
Reexamination Certificate
active
07012428
ABSTRACT:
A method and apparatus of imaging multiple volumes of the anatomy of interest using a phase-cycled SSFP pulse sequence and a reverse elliptic centric view ordering to sample a first volume and an elliptic centric view ordering to sample a second volume is disclosed. Dummy acquisitions are played out between imaging of the first and second volumes, and the time to play out the dummy acquisitions is used to change the phase-cycling scheme of the RF pulses of the SSFP pulse sequence. Oscillations in signal are reduced as the spins in the anatomy of interest are brought to a new steady-state by gradually ramping the RF pulse phase increment for acquisition from the first volume to the RF pulse phase increment for acquisition from the second volume. The present invention is effective for reducing transient oscillations in MR signals from resonance and off-resonance spins, thus enabling the use of this technique for the reduction of motion artifacts in phase-cycled SSFP.
REFERENCES:
patent: 5055790 (1991-10-01), Siuciak et al.
patent: 5912557 (1999-06-01), Wilman et al.
patent: 6144874 (2000-11-01), Du
patent: 6167293 (2000-12-01), Chenevert et al.
patent: 6201393 (2001-03-01), Bernstein et al.
patent: 6288544 (2001-09-01), Bernstein et al.
patent: 6603992 (2003-08-01), Debbins et al.
patent: 6624630 (2003-09-01), Foxall
patent: 6677750 (2004-01-01), Hennig et al.
Casselman, J. et al., “Constructive Interference in Steady State-3DFT MR Imaging of the Inner Ear and Cerebellopontine Angle”, AJNR, 1993, vol. 14, pp. 47-57.
Vasanawala, S. et al., “Linear Combination Steady-State Free Precession MRI”, Magnetic Resource in Medicine, 2000, vol. 43, pp. 82-90.
Zur, Y. et al., “Motion-Insensitive, Steady-State Free Precession Imaging”, Magnetic Resonance in Medicine, 1990, vol. 16, pp. 444-459.
Foxall, D., “Frequency-Modulated Steady-State Free Precession Imaging”, Magnetic Resonance in Medicine, 2002, vol. 48, pp. 502-508.
Hoppel Bernice E.
Ward Heidi A.
Della Penna Michael A.
General Electric Company
Gutierrez Diego
Horton Carl B.
Vargas Dixomara
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