Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1987-02-27
1988-07-26
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324313, G01R 3320
Patent
active
047603364
ABSTRACT:
In magnetic resonance imaging where a subject is placed in a static field and the subject is selectively excited by applying an RF magnetic field in the presence of a gradient magnetic field, the peak RF power of the RF magnetic field is reduced by decreasing the peak amplitude of the RF magnetic field while concurrently reducing the magnitude of the gradient magnetic field. The incremental time duration for the RF magnetic field portion which is reduced in amplitude is proportionately increased. In using an RF pulse having front and back sidelobes with a positive lobe therebetween, the duration of the RF pulse can be reduced by increasing the magnitudes of the sidelobes and concurrently reducing the time periods of the sidelobes. A minimum SAR embodiment can be realized.
REFERENCES:
patent: 4471306 (1984-09-01), Edelstein
patent: 4480228 (1984-10-01), Bottomley
patent: 4506223 (1985-03-01), Bottomley et al.
patent: 4568880 (1986-02-01), Sugimoto
patent: 4585993 (1986-04-01), Bottomley
patent: 4593247 (1986-06-01), Glover
patent: 4613949 (1986-09-01), Glover et al.
Stanford University
Tokar Michael J.
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