Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1984-05-25
1986-11-04
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324311, 324309, G01R 3320
Patent
active
046212353
ABSTRACT:
During measurement cycles for generating and sampling FID signals in NMR imaging devices, a 180.degree. pulse and subsequently a 90.degree. excitation pulse are added to the pulse sequence. The 180.degree. pulse produces an additional echo signal. During (the maximum of) the echo signal, the 90.degree. pulse is generated. The waiting period occurring before the beginning of a next measurement cycle can thus be substantially reduced without giving rise to a significant signal loss in the echo signals to be generated during said cycle. In addition to a reduction of the measurement time, NMR images with different contrasts (other intensity distribution) can be provided.
REFERENCES:
patent: 4471306 (1984-09-01), Edelstein
Den Boef Johannes H.
van Uijen Cornelis M. J.
Mayer Robert T.
Tamoshunas Algy
Tokar Michael J.
U.S. Philips Corporation
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