Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1984-10-31
1987-10-27
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324314, G01R 3320
Patent
active
047032715
ABSTRACT:
The disclosure relates to an NMR tomographic apparatus wherein an improved local resolution is obtained in a selected segment of the examination region. To this end, in a spin-echo-sequence in conjunction with a 90.degree.-Hf-pulse, a first field gradient is generated in one direction for a spatial selection of a first dimension of the segment which is energized to precession and hence signal emission. In an excitation interval with a 180.degree.-Hf-pulse, a second field gradient is generated in a second direction perpendicular to the first cited direction, for achieving a spatial selection of a second dimension of the segment contributing to the echo signal. The echo signal is read out in the presence of a third field gradient which, in turn, is perpendicular to the first and second field gradients. A three dimensional Fourier-Zeugmatography data set for the representation of a series of layers can be picked-up. In addition, it is possible to represent a non-central region. Finally, a zoom imaging is provided such that any selected plural layer volume of the initially selected segment of the examination region can be imaged with increased resolution.
REFERENCES:
patent: 3569823 (1971-03-01), Golay
patent: 4070611 (1978-01-01), Ernst
patent: 4431968 (1984-02-01), Edelstein et al.
patent: 4443760 (1984-04-01), Edelstein et al.
patent: 4506222 (1985-03-01), Edelstein et al.
patent: 4506223 (1985-03-01), Bottomley et al.
patent: 4593247 (1986-06-01), Glover
Loeffler Wilfried
Oppelt Arnulf
Levy Stewart J.
O'Shea Kevin D.
Siemens Aktiengesellschaft
LandOfFree
NMR tomographic apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with NMR tomographic apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NMR tomographic apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1274163