Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1986-02-14
1987-06-23
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324309, G01R 3320
Patent
active
046756086
ABSTRACT:
The magnetic resonance imaging system applies a uniform static magnetic field and a gradient magnetic field to an object and further applies an excitation rotating magnetic field to cause magnetic resonance phenomena in the object, and detects the induced magnetic resonance signals and then obtains image data by these magnetic resonance signals. The system has a power controller for controlling the transmission power in a transmitter for transmitting the excitation rotating field. The system further has a transmission controller for controlling the power controller in response to the magnetic resonance signal which is received by the receiver from the object. The transmission controller controls the power controller to sequentially change the transmission power and detects the transmission power at which the maximum magnetic resonance signal is obtained in response to the reception signal by the receiver when the excitation rotating field is applied to the object, thereby controlling the power controller in accordance with the detected data.
REFERENCES:
patent: 3921060 (1975-11-01), Ekimovskikh et al.
patent: 4297637 (1981-10-01), Crooks et al.
patent: 4329646 (1982-05-01), Tsuda
patent: 4625171 (1986-11-01), Sekihara et al.
Hanawa Masatoshi
Hayakawa Hiroshi
Kabushiki Kaisha Toshiba
O'Shea Kevin D.
Tokar Michael J.
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