Magnetic resonance imaging method, and device for determining th

Details Magnetic resonance imaging method, and device for determining th Magnetic resonance imaging method, and device for determining th

1987-03-17

1989-03-21

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

048147087

ABSTRACT:
The known magnetic resonance imaging method of determining the r.f. power or pulse angle of an r.f. electromagnetic 90.degree.-pulse or 180.degree.-pulse has the drawback that the measurement inaccuracy is often high, that the experimentation time is comparatively long and that its use is limited to r.f. electromagnetic 90.degree.-pulses or 180.degree.-pulses only. In order to mitigate these drawbacks, it is proposed to determine the pulse angle of an r.f. electromagnetic pulse having a pulse angle .alpha. from two out of five echo resonance signals, including one stimulated echo resonance signal, generated by means of three r.f. electromagnetic .alpha..degree.-pulses, .alpha. having an arbitrary value (calibration phase), after which any .beta. can be adjusted by adaptation of the applied r.f. power.

REFERENCES:
patent: 4486709 (1984-12-01), Bendall
patent: 4713615 (1987-12-01), Barratt et al.

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