Method for selective NMR imaging of chemically-shifted nuclei

Details Method for selective NMR imaging of chemically-shifted nuclei Method for selective NMR imaging of chemically-shifted nuclei

1983-12-14

1986-04-29

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324310, G01R 3320

Patent

active

045859930

ABSTRACT:
A method for providing NMR images free of chemical shift artifacts, obtained from selected nuclei of a sample containing nuclei having chemically-shifted NMR frequencies is described. Non-selected nuclei of the sample are selectively saturated prior to applying an NMR imaging sequence by applying to the sample an RF pulse containing frequencies equal to the chemically-shifted frequencies of the non-selected nuclei and having a narrow frequency spectrum about the chemically-shifted frequencies. Alternatively, selected nuclei are directly excited during application of an NMR imaging sequence by applying to the sample an RF pulse containing frequencies equal to the chemically-shifted frequencies of the selected nuclei, and having a narrow frequency spectrum about the chemically-shifted frequencies so as to exclude signal contributions from the non-selected nuclei. These selective pulses are applied in the absence of the imaging magnetic field gradients.

REFERENCES:
patent: 4361807 (1982-11-01), Burl et al.

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