Method for recording nuclear resonance signals

Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system

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324318, G01R 3320

Patent

active

046985948

ABSTRACT:
In order to record nuclear magnetic resonance signals in an area of interest of a sample body which is exposed to a constant magnetic field, a measuring head is applied to a surface of the sample body adjacent the area of interest. The measuring head includes an RF transreceiver unit having a helical line disposed within a shield being open at one of its radial end planes. The helical line is free from connections on one end, and the other end is arranged as an uppermost winding which is electrically connected to the shield via a connection arranged in the open radial end plane. The amplitude of an RF current supplied to a transmitter coil which is arranged coaxially to said measuring head is adjusted to generate an image plane of predetermined constant magnetic RF field strength B at a defined distance above the open radial end plane. The RF current is gated to induce pulsed nuclear magnetic resonance transitions for a predetermined kind of nuclei with respect to the strength of the constant magnetic field. In order to increase the information content of the signals obtained, an image is generated of the two-dimensional distribution of the induced nuclear magnetic transitions within the generated image plans.

REFERENCES:
patent: 4528509 (1985-07-01), Radda et al.
patent: 4636730 (1987-01-01), Bottomley

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