Method for rapid acquisition of NMR data

Details Method for rapid acquisition of NMR data Method for rapid acquisition of NMR data

1989-02-27

1990-07-31

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

RE0332798

ABSTRACT:
A method for rapid acquisition of NMR data utilizes excitation pulses which rotate the longitudinal magnetization through an angle smaller than 90.degree. to create a relatively large transverse magnetization component. A first 180.degree. RF pulse is then applied to create a spin-echo signal, while a second 180.degree. RF pulse is used to rapidly return to equilibrium the residual longitudinal magnetization inverted by the first pulse. The combination of the excitation and the second 180.degree. pulses permits the sequence repetition time to be shortened, thereby reducing the total data collection time. The method is applicable to, for example, two- and three-dimensional embodiments of Fourier transform and multiple-angle projection reconstruction NMR imaging methods.

REFERENCES:
patent: 4115730 (1978-09-01), Mansfield
patent: 4484138 (1984-11-01), Bottomley
patent: 4532474 (1985-07-01), Edelstein
patent: 4707658 (1987-11-01), Frahm et al.
patent: 4742301 (1988-05-01), van der Meulen et al.
Edelstein, "Spin Warp NMR Imaging and Applications to Human Whole-Body Imaging", Phys. Med. Biol., vol. 25, pp. 751-756 (1980).

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