Pulse sequence for operating a nuclear magnetic resonance tomogr

Details Pulse sequence for operating a nuclear magnetic resonance tomogr Pulse sequence for operating a nuclear magnetic resonance tomogr

1989-03-23

1990-02-13

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

049010204

ABSTRACT:
A pulse sequence is disclosed for operating a nuclear magnetic resonance tomography apparatus for producing images having different T.sub.2 contrast. A signal for the gradient-echo imaging is first acquired after excitation of the nuclei subsequently, the magnetization, which is already prepared for imaging, is refocused by a 180.degree. radio-frequency pulse, and a second echo is measured in the presence of a readout gradient. Independent images having different T.sub.2 contrast can be reconstructed with the gradient echo and with the spin echo. It is thus possible to simultaneously measure a gradient echo image having a significantly lower T.sub.2 contrast during the measuring time for a spin echo image.

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"Multiple-Spin-Echo Imaging With a 2D Fourier Method," Graumann et al., Magnetic Resonance in Medicine, vol. 3, pp. 707-721 (1986).
"Sodium Magnetic Resonance Imaging of Human Body," Ra et al., SMRM Book of Abstracts (1986), pp. 1462-1463.

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