Imaging method

Details Imaging method Imaging method

1990-08-28

1992-10-27

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

051592703

ABSTRACT:
The invention relates to an imaging method for the examination of an object such as a human body, an animal or a tree trunk, based on the NMR phenomenon and magnetic resonance imaging techniques. The amplitude of excitation pulses used for producing an NMR signal is selected in a manner that a so-called excitation angle is smaller than 90.degree. and the object of these excitation pulses is subjected to electromagnetic irradiation at a frequency which is different from the resonance frequency of an NMR signal recording on the magnetic image of said object.

REFERENCES:
patent: 4587489 (1986-05-01), Wehrli
patent: 4699148 (1987-10-01), Gyngnell
patent: 4707658 (1987-11-01), Framm et al.
Crooks, L. E., "Selective Irradiation Line Scan Techniques for NMR Imaging", IEEE Trans. Nucl. Sci., vol. 27, pp. 1239-1241, 1980.
Tanttu, J., "Koelaiteisto NMR-Kuvausta Varten", University of Helsinki, 1982.
Pohjonen, J., "Koelaitteisto Liikkuvan Kohteen NMR-Kuvausta Varten", Helsinki Technical University, 1984.
Buxton, R. B., "Signal Intensity in Fast NMR Imaging with Short Repetition Times", J. Mag. Reson., vol. 83, pp. 576-585, 1989.

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