Traveling wave MRI in high BO field strengths
US9726736B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2011 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Aug 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/4802
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an MRI scanner, the transmission and reception of RF excitation and detected signal waves is accomplished using far field excitation instead of conventional near field excitation. By superimposing two counter-propagating waves from the same source in the MRI sample interference fringes are recorded in the sample in such a way that the relative phase between the two propagation wave vectors determines the periodicity of the maxima and minima in the interference fringe pattern. The complete fringe pattern, known as a spatial hologram, contains both the phase and amplitude information of the information-bearing wave. When exposed to a replica of the original reference wave, the fringe pattern acts as a diffraction grating, reproducing the information-bearing field propagating at the same relative phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.