Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2006-05-09
2006-05-09
Gutierrez, Diego (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
C324S309000
Reexamination Certificate
active
07042215
ABSTRACT:
Spiral imaging has recently gained acceptance for rapid MR data acquisition. One of the main disadvantages of spiral imaging, however, is blurring artifacts due to off-resonance effects. Dixon techniques have been developed as methods of water-fat signal decomposition in rectilinear sampling schemes, and they can produce unequivocal water-fat signal decomposition even in the presence of B0inhomogeneity. Three-point and two-point Dixon techniques can be extended to conventional spiral and variable-density spiral data acquisitions for unambiguous water-fat decomposition with off-resonance blurring correction. In the spiral three-point Dixon technique, water-fat signal decomposition and image deblurring are performed based on the frequency maps that are directly derived from the acquired images. In the spiral two-point Dixon technique, several predetermined frequencies are tested to create a frequency map. The techniques can achieve more effective and more uniform fat signal suppression when compared to the conventional spiral acquisition method with SPSP pulses.
REFERENCES:
patent: 4746864 (1988-05-01), Satoh
patent: 5270653 (1993-12-01), Pauly
patent: 5402067 (1995-03-01), Pauly et al.
patent: 5498960 (1996-03-01), Vinegar et al.
patent: 5539313 (1996-07-01), Meyer
patent: 5652516 (1997-07-01), Adalsteinsson et al.
patent: 6016057 (2000-01-01), Ma
patent: 6020739 (2000-02-01), Meyer et al.
patent: 6084408 (2000-07-01), Chen et al.
patent: 6215306 (2001-04-01), Tsai et al.
patent: 6459922 (2002-10-01), Zhang
patent: 6486670 (2002-11-01), Heid
patent: 6583623 (2003-06-01), Kwok et al.
patent: 6603990 (2003-08-01), Zhang et al.
patent: 2001/0026157 (2001-10-01), Heid
patent: 2003/0060697 (2003-03-01), Zhang et al.
patent: 2005/0017717 (2005-01-01), Duerk et al.
patent: 2005/0033153 (2005-02-01), Moriguchi et al.
patent: 0950902 (1999-10-01), None
patent: WO 2004086060 (2004-10-01), None
patent: WO 2004097387 (2004-11-01), None
Kwok et al., article: “Interleaved Water and Fat Dual-Echo Spin Echo Imaging with Intrinsic Chemical-Shift Elimination”, Journal of Magnetic Resonance Imaging 13: 318-323 (2001).
Noll D. C. et al: “Deblurring for Non-2D Fourier Transform Magnetic Reasonance Imaging” 1-2,5,6, 8-20 (Magnetic Resonance in Medicine 25, (1992).
King K.F. et al., “Concomitant gradient field effects in spiral scans” (Magnetic Resonance in Medicine: (Official Journal of the Society of Magnetic Resonance in Medicine/Society of Magnetic Resonance in Medicine.) (Jan. 1999, vol. 41, No. 1, Jan. 1999 pp. 103-112).
Irarrazabal P. et al.: “Inhomogeneity Correction Using An Estimated Linear Field Map” (Magnetic Resonance in Medicine, Academic Press, Duluth, MN, US, vol. 35, No. 2, Feb. 1, 1996, pp. 278-282.
Nayak K. S. et al: “Efficient off-resonance correction for spiral imaging” (Magnetic Resonance in Medicine Wiley USA, vol. 45, No. 3, 2001, pp. 521-524).
Man L-C et al: Multifrequency Interpolation for Fast Off-Resonance Correction (Magnetic Resonance in Medicine, Academic Press, Duluth, MN, US, vol. 37, No. 5, May 1, 1997 pp. 785-792.
Glover, G. H. et. al.: “Three-Point Dixon Technique for True Water/Fat Decomposition with BO Inhomogeneity Correction” (Magnetic Resonance in Medicine, Academic Press, Duluth, MN, US, vol. 18, No. 2, Apr. 1, 1991 pp. 371-383.
Duerk Jeffrey L.
Lewin Jonathan S.
Moriguchi Hisamoto
Case Western Reserve University
Fetzner Tiffany A.
Gutierrez Diego
Hahn Loeser & Parks LLP
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