Magnetic resonance imaging system with a class-E radio frequency amplifier having a feedback circuit
US7397243B1 · kind B1 · utility
5Cited by
12References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2007 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jul 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/34046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Class-E amplifier has been adapted for use in the radio frequency section that drives a transmit coil of a magnetic resonance imaging (MRI) system. The Class-E amplifier responds to a radio frequency carrier signal and a control signal by producing a radio frequency excitation signal for driving the transmit coil. The Class-E amplifier includes a pickup coil that senses a signal emitted from the transmit coil and produces a feedback signal that is used to alter the control signal and thereby control production of the radio frequency excitation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.