Method of calibration of a stereoscopic camera system for use with a radio therapy treatment apparatus
US9962561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2014 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Oct 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Some embodiments are directed to a calibration method including a calibration phantom positioned on an adjustable table on the surface of a mechanical couch, with the phantom's center at an estimated location for the iso-center of a radio therapy treatment apparatus. The calibration phantom is then irradiated using the apparatus, and the relative location of the center of the calibration phantom and the iso-center of the apparatus is determined by analyzing images of the irradiation. The calibration phantom is then repositioned by the mechanical couch applying an offset corresponding to the determined relative location of the center of the calibration phantom and the iso-center of the apparatus to the calibration phantom. Images of the relocated calibration phantom are obtained, and the images are processed to set the co-ordinate system of a 3D camera system relative to the iso-center of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.