Radio frequency field localization for magnetic resonance
US7633293B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2007 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | May 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5659
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Technology for controlling non-uniformity in the B1 field includes selecting the phase, magnitude, frequency, time, or spatial relationship among various elements of a multi-channel excitation coil in order to control the radio frequency (RF) power emanating from the coil antenna elements. Non-uniformity can be used to steer a constructively interfering B1 field node to spatially correlate with an anatomic region of interest. A convex (quadratically constrained quadratic problem) formulation of the B1 localization problem can be used to select parameters for exciting the coil. Localization can be used in simulated Finite Difference Time Domain B1 field human head distributions and human head phantom measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.