Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1983-11-04
1987-04-07
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324318, G01R 3320
Patent
active
046564233
ABSTRACT:
An NMR diagnostic apparatus capable of obtaining tomographic images in any direction and in any portion of the patient. A magnetic device applies a static magnetic field along a longitudinal axis of the patient. A first coil device is arranged along this longitudinal axis and applies a first gradient magnetic field in conjunction with the static magnetic field so as to define a slice in the patient which is to be examined. The first coil device also applies at least one second gradient magnetic field which defines a projection angle from which NMR signals are obtained. A probe head coil device applies RF pulses to excite nuclei in the slice and to detect the NMR signals emanating from the slice. A second coil device is arranged along the longitudinal axis and applies to the slice a shifting magnetic field which shifts a magnetically-zero plane of the first gradient magnetic field in a direction perpendicular to the magnetically-zero plane. A plurality of second coil means may be provided to shift a magnetically-zero plane throughout the patient so that slices in any portion of the patient may be examined.
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Oldham Scott M.
Tokar Michael J.
Tokyo Shibaura Denki Kabushiki Kaisha
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