Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-04-07
1978-09-19
Tokar, M.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 05B, G01R 3308
Patent
active
041157303
ABSTRACT:
A nuclear magnetic resonance spin density distribution in a sample is obtained for a selected plane or planes by placing the sample in a static magnetic field, applying a gradient to the field and simultaneously applying selective rf pulses to select a plane or planes in the sample, switching to an orthogonal gradient and simultaneously applying selective rf pulses to select strips in the selected plane or planes and then applying orthogonal field gradients to the sample of such relative magnitudes that each point of the selected strips is subjected to a resultant magnetic field of amplitude unique to that point. The free induction decay signal is then read out from the strips.
REFERENCES:
patent: 3789832 (1974-02-01), Damadian
patent: 3932805 (1976-01-01), Abe et al.
patent: 4015196 (1977-03-01), Moore et al.
patent: 4021726 (1977-05-01), Garroway et al.
National Research Development Corporation
Tokar M.
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