Investigation of samples by N.M.R. techniques
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United States of America Patent
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-
Jan 15, 1980
Grant Date -
N/A
app pub date -
May 24, 1978
filing date -
May 27, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Nuclear magnetic resonance is excited in a sample subjected a magnetic field having a varying component which defines a localized volume approximating to a line or surface, the field within the localized volume being invariant with time but exhibiting a spatial gradient. The r.f. irradiation is in the form of a pulse train such that the signal received from the sample contains continuous wave components respectively dependent on the density of relevant nuclei in different regions of the localized volume. The amplitudes of these components are determined by coherently detecting the received signal, sampling the detected signal(s) and subjecting the resultant data to Fourier transformation.
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