Method of imaging by depth-resolved surface coil spectroscopy

Details Method of imaging by depth-resolved surface coil spectroscopy Method of imaging by depth-resolved surface coil spectroscopy

1984-07-02

1986-12-16

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324322, G01R 3320

Patent

active

046299882

ABSTRACT:
A method for obtaining spatially resolved nuclear magnetic resonance chemical shift spectra, by depth-resolved surface coil spectroscopy (DRESS), substantially eliminates surface tissue contamination of the chemical shift spectra by employing selective excitation in the presence of a gradient magnetic field directed coaxial with the axis of a surface coil. The nuclei in a disk-shaped preselected volume are excited by a selective radio-frequency signal pulse applied in the presence of the gradient field. The surface coil is always utilized for receiving magnetic resonance response signals, while the same surface coil, or a separate transmitting antenna, can be used to provide the radio-frequency excitation field across the selected disk-shaped volume. The technique can be combined with conventional 90.degree.-.tau.-180.degree. or 180.degree.-.tau.-90.degree. relaxation time measurement RF pulse sequences, or with a solvent suppression NMR spectroscopy technique employing selective excitation.

REFERENCES:
patent: 4290019 (1981-09-01), Hutchison et al.
patent: 4528509 (1985-07-01), Radda
patent: 4558279 (1985-12-01), Ackerman et al.

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