NMR pulse sequence with burst RF excitation pulses having separa

Details NMR pulse sequence with burst RF excitation pulses having separa NMR pulse sequence with burst RF excitation pulses having separa

1991-08-09

1993-05-18

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01V 300

Patent

active

052124487

ABSTRACT:
An NMR system acquires data for producing an image using a spin-warp burst excitation pulse sequence. RF phase and flip-angle of each RF excitation pulse in the burst is separately controlled to maximize the SNR of the corresponding set of acquired NMR echo signals. The phase and amplitude of each acquired NMR echo signal is adjusted by an amount determined by its corresponding excitation pulse before being used for image reconstruction.

REFERENCES:
patent: 4689566 (1987-08-01), Maudsley
patent: 4710718 (1987-12-01), Shaka
patent: 4914392 (1990-04-01), Ugurbil et al.
patent: 5027072 (1991-06-01), Rinaldi
J. Hennig & M. Mueri, "Fast Imaging Using Burst Excitation Pulses", (1988), p. 238.
Pauly, Le Roux, & Macovski, "Parameter Relations for the Shinnar-Le Roux Selective Excitation Pulse Design Algorithm", (Mar. 1991), pp. 53-65.
Pauly, Nishimura & Macovski, "A k-Space Analysis of Small Tip Angle Excitation", (1988), pp. 1-11.

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