MRI coil using inductively coupled individually tuned elements arranged as free-pivoting components
US5483163A · kind A · utility
19Cited by
38References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1993 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Aug 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3642
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An MRI probe/transmitter coil has a pair of concentric cylinders with a plurality of inductively coupled freely rotating resonant elements radially mounted between the two cylinders. The coil can be tuned both symmetrically by pivoting all the resonant elements uniformly or asymmetrically by tuning them individually. The coil is driven in quadrature by a quad-hybrid circuit. A substantial part of the electromagnetic energy is stored in the resonant elements outside of the loading region of the coil to reduce perturbation in the coil operation due to the characteristics of the test subject.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.