Method, apparatus and recording medium for measuring and correcting phase error in spins in a phase axis direction
US6664787B2 · kind B2 · utility
9Cited by
19References
34Claims
0Family size
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Key dates
| Filing date | Aug 20, 2001 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Oct 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For the purpose of accurately measuring and correcting a phase error in spins in a phase axis direction, a gradient magnetic field having an integral value of zero is applied in the phase axis direction during a time period between first and second 180° excitations to read out a first spin echo SE1; a gradient magnetic field having an integral value of zero is applied in the phase axis direction during a time period between second and third 180° excitations to read out a second spin echo SE2; and a phase error due to an effect of residual magnetization Gp0 is determined based on these spin echoes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.