Nuclear magnetic resonance refocusing pulses for inhomogeneous magnetic fields
US10001578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2014 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Oct 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for applying a nuclear magnetic resonance (NMR) sequence is described herein. The method includes applying a series of refocusing pulses to a substance within an inhomogeneous static magnetic field. Each refocusing pulse in the series of refocusing pulses includes a central axis, a total pulse duration greater than t180, and at least five segments (e.g., 5, 7, 11, 20, and 21). The phase of each segment is substantially anti-symmetric about the central axis of the refocusing pulse. In a more particular embodiment, the phase of each segment is also symmetric about the central axis of the refocusing pulse and the five segments include a substantially constant amplitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.