Magnetic resonance imaging switching power amplifier system and methods
US10585155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2017 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Jan 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/422
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure regards a magnetic resonance imaging system including a scanner, and gradient drivers. The scanner is to be implemented within a scan room that is shielded from electromagnetic interference. Gradient coils are designed to create a linear gradient in the magnetic field generated in the scanner by a primary magnet. These coils are energized by gradient drivers. The gradient drivers use transformers and other electrical devices in a switching stage configured to generate pulse-width-modulated power. The transformers may have non-magnetic cores to facilitate implementing the gradient drivers within the scan room. The gradient drivers also use a filtering stage which uses inductors and other electrical devices to smooth the pulse-width-modulated power. The inductors within the filters may have non-magnetic cores to facilitate implementing the gradient driver within the scan room. Additionally, an inductor with a hollow wire may be used to circulate fluid to facilitate cooling the gradient driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.