Pulse sequence and method for creating a radio-frequency magnetic field gradient with a spatially independent phase for NMR experiments
US5521504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Jan 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4831
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A composite RF pulse is created from a sequence of conventional homogeneous RF pulses and conventional gradient RF pulses and the composite pulse generates a gradient magnetic field with a spatially varying amplitude, but a spatially independent phase. In one embodiment of the invention, the pulse sequence consists of four conventional gradient RF pulses interspersed with two conventional homogeneous RF pulses. In another embodiment of the invention, a conventional gradient RF pulse is combined with a conventional homogeneous RF pulse and the pulse pair is repeated in order to generate an effective magnetic field with a spatially varying amplitude, but a spatially independent phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.