RF based spatially selective excitation in MRI
US8228062B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 2, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Feb 5, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3607
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Herein a method for slice selection is provided in an MRI process, the method involves controlling a transmit array by adding low flip angle RF pulses interspersed between refocusing pulses that are used to move a k-space weighting function with respect to one or more B 1 fields used to deposit energy according to a desired k-space weighting function. The low flip angle pulses deposit energy so that an envelope traced by the low flip angle pulses in the k-space weighting function is related to a desired spatially excited region of the sample volume, for example by a Fourier transform, if the phase encoding directions are linear axes that coordinatize the sample volume, and the B 1 fields have linear phase gradients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.