Operative instrument providing enhanced visibility area in MR image
US5211166A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An operative instrument for the examination of an object, for example a biopsy tube or a capsule of a radioactive substance intended for radiation therapy. A part of the operative instrument, the active part, is adapted to be detected by NMR methods, such as magnetic resonance imaging, either in a manner that the active part contains a substance having NMR active nuclei or in a manner that the NMR active nuclei in proximity of the active part of the object can emit NMR signals in connection with an NMR or magnetic resonance imaging examination arrangement. A substance, a relaxant, is arranged in interaction with said NMR active nuclei, said relaxant causing activation of the NMR signal by means of dynamic nuclear polarization (DNP) when the electron spin system of said substances is saturated with external energy, i.e. saturation energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.