Method for the measurement of the effects of eddy currents
US5126672A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Sep 17, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56518
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement is made of the effects of eddy currents during a long period (TM) in an NMR machine by placing, in this machine, a probe possessing a material capable of magnetic resonance with a small spin-spin relaxation time, and by proceeding to make a reiteration (PR) of the electromagnetic excitation (17-19) of a resonance signal in this material and to measure the resultant de-excitation NMR signal (20-22), for as many times more as the period during which the effects of the eddy currents have to be taken into account is long. It is shown that this way of doing things enables an accurate appreciation of the corrections to be made to the real field gradient pulses (23-24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.