Pulse sequence and method for suppression of magneto-acoustic artifacts in NMR data
US6204663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1997 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Mar 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Novel pulse sequence and data acquisition method are disclosed which eliminate the effects of spurious NMR signals caused by mechanical resonances within the measurement apparatus. The proposed method alleviates interference problems typically arising from strong "excitation" pulses in a sequence, and enables the use of the corresponding data points to increase the resolution of the measurement. The method is based on changing the measurement frequency between pulse sequences and averaging out data points obtained from the different sequences in a way that effectuates cancellation of the spurious signals. The novel cycle of ulse sequences and a data acquisition method can be used, or example, with any existing NMR logging instruments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.