Method for processing NMR data without phase-alternating-pair (PAP) averaging
US6388441B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N24/081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
NMR data are acquired using a phase-alternation of the tipping pulse. Differences between consecutive samples acquired with same or different frequencies are determined and an average value of the differences is determined over a sample window and over a range of echoes. This average value, determined separately for the in-phase and quadrature component data is a measure of the systematic noise and may be applied to the in-phase and quadrature component data to give corrected data with a higher resolution than prior art methods of processing phase alternated pulse sequence data. The method may also be used to improve the resolution of multifrequency NMR data acquired with a gradient logging tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.