Estimating absolute phase of radio frequency fields of transmit and receive coils in a magnetic resonance
US10890631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2018 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Feb 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/583
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatuses for determining spatial distribution of an absolute phase of RF transmit field B1+ and/or RF receive field B1− in an MRI system are described herein. An example method can include selecting a transmit coil for which to measure the absolute phase of the RF transmit field B1+, exciting nuclear spins in MR nuclei using at least two transmit configurations of the transmit coil, and detecting first and MR signals arising from exciting nuclear spins in MR nuclei using first and second transmit configurations, respectively. The method can also include acquiring first and second sets of complex k-space data from the first and second MR signals, respectively, and estimating an absolute phase B1+ map of the transmit coil using the first set of complex k-space data and the second set of complex k-space data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.