Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1990-05-03
1992-06-02
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3320
Patent
active
051190265
ABSTRACT:
An arrangement in a magnetic resonance imaging apparatus for producing image data of an object being examined. The object is subjected to magnetic fields and RF pulse signals which produce echo signals. The echo signals which represent views of the object are detected. Data collecting circuitry selectively performs a data collection process on the detected echo signals to produce collected data such that, for those echo signals of a relatively small strength, part of the data collection process is suppressed and, for those echo signals of a relatively great strength, the data collection process is performed a plurality of times under identical operating conditions. A data processor processes the collected data to produce view data such that, for the echo signals for which the data collection process has been suppressed, interpolation data is produced and, for the echo signals for which the data collection process has been performed a plurality of times, a summing and averaging operation is performed on the collected data. The data processor combines the interpolation data with the summed and averaged data thereby producing view data. An image constructor performs a Fourier transform on the view data thereby constructing image data.
REFERENCES:
patent: 4796635 (1989-01-01), Dumoulin
"NMR Fourier Zeugmatography", Kumar et al. Journal of Magnetic Resonance 18, 69-83, 1975.
"A Parallel Algorithm for Rotating-Frame Zeugmatography", Chen et al., Magnetic Resonance in Medicine 1, 354-360, 1984.
Iino Mitsutoshi
Kawaguchi Hiromi
Nakatao Shirou
Tanaka Masaru
Yonekura Toshiaki
Fuji Electric & Co., Ltd.
Fujifacom Corporation
Tokar Michael J.
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