Apparatus for stereotactic radiosurgery
US5189687A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/363
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Stereostactic radiosurgery apparatus for eliminating misalignments due to mechanical inaccuracies and sag of a linear accelerator radiation-emitting head which is swung through an arc comprises a guiding and support structure with a first bearing system for accurately rotating a collimator through a precise arc in a vertical plane with respect to a predetermined center point in the plane corresponding to a treatment location, a second gimbal bearing system for coupling the collimator to the head so that the rotating head can drive the collimator through its arc while mechanically uncoupling the head from the collimator by eliminating torques and forces on the collimator which would be exerted by mechanical inaccuracies or sag of the head, and a third bearing system for rotatably supporting a stereotactic floorstand for rotation about a vertical axis which intersects the center point. Since the movement of the collimator and the rotation of the floorstand are precisely controlled with respect to the center point, the apparatus ensures that radiation from the head will be accurately focused at the center point for all rotational positions of the head and floorstand. Mechanical linkin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.