Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1987-11-19
1988-12-20
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3320
Patent
active
047927585
ABSTRACT:
In a magnetic resonance imaging system, a plurality of RF pulses (24) are applied in bundles (62). The pulses in each bundle have an interpulse spacing (66) which is shorter than the T1 and T2 relaxation time of an imaged sample. The next pulse of the bundle is applied before the magnetic resonance response can build to a steady state echo. After a steady state resonance condition is reached, the application of radio frequency pulses is interrupted for an interbundle duration (72) which is sufficiently long for the steady state echo (96) to occur. Magnetic resonance imaging data is sampled during the steady state echo. Slice select gradients (34) are applied concurrently with each radio frequency pulse. In the interbundle interval, a phase encode gradient (42) and a read gradient (38) are applied. The sequence is repeated a plurality of times each with a different phase encode gradient to generate the appropriate data lines or views for transformation into an image representation.
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Levy Stewart J.
O'Shea Kevin D.
Picker International Inc.
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