Method for calibrating a radiofrequency excitation in NMR experi

Details Method for calibrating a radiofrequency excitation in NMR experi Method for calibrating a radiofrequency excitation in NMR experi

1987-04-13

1988-11-29

Noland, Tom

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

047885017

ABSTRACT:
Size variation of samples subjected to NMR examinations entails the need for calibration of the radiofrequency excitation which gives rise to the resonance phenomenon measured during experiments. Determination of the most suitable value of the radio-frequency excitation amplitude is carried out by scanning the range of potential amplitudes, starting from one end of the range. During the scanning operation, the variation in excitation amplitude varies in a geometrical progression with the order number of the experimentation. It is shown that, by adopting this procedure, determination of the calibrated amplitude is achieved more rapidly while maintaining constant accuracy of determination.

REFERENCES:
patent: 4291272 (1981-09-01), Hofer et al.
patent: 4379262 (1983-04-01), Young
patent: 4602213 (1986-07-01), Sugiura
patent: 4720678 (1988-01-01), Glover et al.
patent: 4739267 (1988-04-01), LeRoux et al.
Proceedings of an International Symposium on NMR Imaging, Oct. 1981, pp. 33-39, Bowman Gray School of Medicine of WakeForest University, Winston Salem, N.C., U.S.; D. I. Hoult: "Radio Frequency Coil Technology in NMR Scanning".
Patents Abstracts of Japan, vol. 9, No. 253 (P-395) [1976], 11 Oct. 1985; & JP-A-60 104 243 (Nippon Denshi K.K.) 08-06-1985.

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