Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1985-08-16
1987-10-20
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324309, 324308, G01R 3320, G01N 2408
Patent
active
047017090
ABSTRACT:
An NMR imaging method for measuring a magnetization distribution of an article under test, particularly the magnetization distribution including a longitudinal relaxation effect, by a Fourier imaging method with identification of polarity of the magnetization distribution.
A homogeneous phantom is measured by the Fourier imaging method and image-reconstructed so that a reference image data which reflects a phase rotation inherent to an NMR imaging apparatus is obtained. Then, a magnetization distribution of an article under test is obtained in a similar measurement and image reconstruction sequence, and products of the reference image data and the image data of the article under test are stored as the signs to represent the polarity of magnetization of the article under test.
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patent: 4604579 (1986-08-01), Cannon et al.
T. Inouye et al., A Method for T.sub.1 Relaxation Time Computed Images, Society of Mag. Res. in Medicine, 2nd Annual Meeting, San Francisco, Aug. 1983.
T. Inouye et al., Experimental Results with a Whole Body NMR-CT Scanner Using a Resistive Magnet, Radiation Medicine, vol. 1, No. 1, Jan. 1983.
T. Redpath, Calibration of the Aberdeen NMR Imager for Proton Spin-Lattice Relaxation Time Measurement in Vivo, Phys. Med. Biol., vol. 27, No. 8, 1982.
Kohno Hideki
Takeda Ryuzaburo
Yamamoto Etsuji
Hitachi , Ltd.
Levy Stewart J.
Oldhom Scott M.
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