Method for determining optimized radio-frequency pulse shapes fo

Details Method for determining optimized radio-frequency pulse shapes fo Method for determining optimized radio-frequency pulse shapes fo

1992-08-05

1993-08-10

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324300, G01V 300

Patent

active

052352803

ABSTRACT:
In magnetic resonance spectroscopy and imaging, it is usually necessary to obtain spectra only from desired, localized regions of an examination subject. This is accomplished by subjecting the examination subject to a selective radio-frequency (RF) pulse. A method for optimizing the pulse shape of such a radio-frequency pulse includes the steps of exciting a spin system with a frequency-selective radio-frequency pulse, reading out the resulting echo signal, cutting off high-frequency signal components of the echo signal using a filter, and employing the filtered echo signal as the optimized radio-frequency pulse shape.

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"Parameter Relations for the Shinnar-Le Roux Selective Excitation Pulse Design Algorithm," Pauly et al., IEEE Transactions on Medical Imaging, vol. 10, No. 1, Mar. 1991 (pp. 53-65).
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"Computer Simulation of Selective Excitation in NMR Imaging," Locher, Phil. Trans. R. Soc. Lond. B 289 (1980), pp. 537-542.

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