Field-frequency lock system for magnetic resonance system
US6242915A · kind A · utility
76Cited by
1References
12Claims
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Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/389
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A field-frequency lock system for an MRI system includes a microcoil and resonant sample located to sense changes in the polarizing magnetic field. Changes are detected as a shift in frequency of the NMR signal produced by the resonant sample, and the frequency shift is used to compensate the MRI system. Compensation is achieved by adjusting the RF reference signal employed in the MRI system transceiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.