Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2011-03-15
2011-03-15
Shrivastav, Brij B (Department: 2858)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S309000
Reexamination Certificate
active
07906969
ABSTRACT:
A magnetic resonance diagnosis apparatus includes a coil assembly including a high-frequency coil, a transmission unit which excites magnetization of a specific atomic nucleus of an object via the high-frequency coil, a reception unit including a detection unit for receiving a magnetic resonance signal via the high-frequency coil, a low-pass filter, and an analog/digital converter, a control unit which sets a passband of the low-pass filter to not less than three odd multiple of a frequency band determined from an imaging field of view, and sets a sampling frequency of the analog/digital converter to an oversampling frequency exceeding a signal band of the magnetic resonance signal, a noise spatial distribution generating unit which generates a noise spatial distribution on the basis of an output from the reception unit.
REFERENCES:
patent: 3810001 (1974-05-01), Ernst
patent: 5297033 (1994-03-01), Bito et al.
patent: 5739691 (1998-04-01), Hoenninger, III
patent: 7626388 (2009-12-01), Taniguchi et al.
patent: 2009/0096447 (2009-04-01), Prance et al.
National Electrical Manufacturers Association: Determination of signal-to-noise ratio in diagnostic magnetic resonance imagers, NEMA Standard Publications, MS-1, 2001.
Kasai and Doi, “MR Imaging Technology,” Ohmsha, 2003.
Ogura, et al., “Basic Study on Measurement of SNR of MR Image,” Japanese Journal of Radiological Technology, 59(4), 508-513, 2003.
Pruessmann KS, et al., SENSE: Sensitivity Encoding for Fast MRI, Magnetic Resonance in Medicine 42:952-962 (1999).
Kellman P., et al., Image reconstruction in SNR units: A general method for SNR measurement, Magnetic Resonance in Medicine 54: 1439-1447 (2005).
Reeder SB, et al., Practical Approaches to the evaluation of signal-to-noise ratio performance with parallel imaging: Application with cardiac imaging and a 32-channel cardiac coil, Magnetic Resonance in Medicine 54:748-754 (2005).
Steckner MC, A new signal acquisition, two-image difference method for determining MR image SNR, Proc. Intl. Soc. Mag. Reson. Med. 1, p. 2398 (2006).
Communication of Extended European Search Report dated Oct. 26, 2010 with attached European Search Report for EP 09000976.2-2209.
Mugler, J.P., et al., “Implementation of mixed bandwidth MRI pulse sequences using a single analog lowpass filter,” Magnetic Resonance Imaging, Elsevier Science, Tarrytown, NY, US LNKD-DOI: 10. 1016/0730-725X(89)90403-7, vol. 7, No. 5, Sep. 1, 1989, pp. 487-493, XP023256903, ISSN: 0730-725X.
Constantinides, C.D., et.al., “Signal-to-noise measurements in magnitude images from NMR phased arrays,” Magnetic Resonance in Medicine, Academic Press, Duluth, MN, US LNKD-DOI: 10.1002/MRM.1910380524, vol. 38, No. 5, Nov. 1, 1997 , pp. 852-857, XP007907123, ISSN: 0740-3194.
Dietrich, O., et al., “Measurement of signal-to-noise ratios in MR images: Influence of Multichannel coils, parallel imaging, and reconstruction filters,” Journal of Magnetic Resonance Imaging, Society for Magnetic Resonance Imaging, Oak Brook, IL, US LNKD-DOI:10.1002/JMRI.20969, vol. 26, No. 2, Aug. 1, 2007, pp. 375-385, XP007915365, ISSN: 1053-1807.
Machida, Y., et al., “A Novel SNR Estimation Technique Applicable to Clinical Parallel MR Images: Triple Bandwidth,” Proceedings of the International Society for Magnetic Resonance in Medicine, 16thScientific Meeting and Exhibition, Toronto, Canada, May 3-9, 2008, vol. 16, Apr. 19, 2008, p. 3089, XP007915352.
Kabushiki Kaisha Toshiba
Nixon & Vanderhye PC
Shrivastav Brij B
Toshiba Medical Systems Corporation
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