Method and apparatus for compensating polarizing fields in magnetic resonance imaging
US6507190B1 · kind B1 · utility
16Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2000 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Aug 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Monitor signals are acquired in an interleaved manner during a scan with an MRI system. Frequency changes caused by variations in the polarizing field B0 are measured using the monitor signals, and these measured frequency changes are employed to compensate image data acquired during the scan. Electrical currents are produced in a set of shim coils that shim the polarizing field B0 in the immediate vicinity proximal to the monitor coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.