Optimizing characteristics of RF pulses used in NMR measurements
US6624629B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2000 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | May 8, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4608
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An NMR measurement apparatus includes at least one magnet, at least one antenna, an RF pulse transmitter and a controller. The magnets) establish a static magnetic field, and the RF pulse transmitter is coupled to the antenna(e). The controller is coupled to the transmitter and the antenna(e). The controller is adapted to cause the RF transmitter to transmit RF pulse sequences into a sample and for each different RF pulse sequence, vary an estimated pulse width for producing a predetermined flip angle by a different scaling factor to produce flip angles near the predetermined flip angle. The controller is adapted to receive spin echo signals in response to the transmission of the RF pulse sequences; determine a property of the sample in response to the spin echo signals; and use the spin echo signals to determine an optimal pulse width for producing the predetermined flip angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.