Magnetic resonance RF probe with electromagnetically isolated transmitter and receiver coils
US4996481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Aug 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3621
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An RF probe for use in magnetic resonance applications includes a transmitter coil for transmitting RF energy to excite a specimen and a receiver coil for sensing the RF energy absorbed or emitted by the specimen wherein the receiver coil is electrically decoupled from the transmitter coil through the geometrical shape and positioning of the receiver coil with respect to the transmitter coil. Both the transmitter and receiver coils are used to produce well defined RF magnetic fields. The technique includes the concept of physically locating multiple elements of either a transmitter or receiver coil such that the net current induced in the receiver coil is equal to zero. This technique is achieved in a frequency independent manner without orthogonally aligning the receiver coil with the transmitter coil, the coils being suitable for co-axial alignment as well as other alignments, much akin to prior art probes and thus readily adaptable to exisiting devices and protocols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.