Suppression of non-coupled spins in NMR imaging and spectroscopy

Patent · Tue Nov 10 04:00:00 EST 1987

OSTI ID:5890457

Dumoulin, C L

A method is described for suppressing, in nuclear magnetic resonance (NMR) investigation of a sample, undesired response signals from nuclei which are not coupled to one another, while obtained desired NMR signals from nuclei which are spin-coupled to one another, comprising the steps of: (a) evoking each of respective first and second NMR response signals from the sample responsive to respective first and second excitation signal sequences; (b) preceding each of the first and second NMR excitation signal sequences with a different one of an alternating pair of signal subsequences predeterminedly selected for causing each of the excitation sequences to generate response signals which are (1) substantially of the same phase from nuclei with uncoupled spins and (2) substantially of opposite phase from nuclei with coupled spins; (c) acquiring the response signals generated in response to the first subsequence and first sequence to form a first set of recovered data; (d) acquiring the response signals generated in response to the second subsequence and second sequence to form a second set of recovered data; (e) subtracting one of the first and second data sets from the remaining data set; and (f) generating one of an image and a spectrum of the sample responsive to the difference data set obtained in step (e).

• Assignee: General Electric Co., Schenectady, NY
• Patent Number(s): US 4706024
• OSTI ID: 5890457
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ANGULAR MOMENTUM
COUPLING
ELECTRONIC CIRCUITS
IMAGE PROCESSING
MAGNETIC RESONANCE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
PARTICLE PROPERTIES
PROCESSING
PULSE CIRCUITS
RESONANCE
SIGNAL CONDITIONERS
SIGNAL CONDITIONING
SPECTRA
SPECTROSCOPY
SPIN