IVAN DANIEL MEIR,MARTIN ALLEN,GIDEON MATTHEW HALE,NORMAN RONALD SMITH,ROBERT EDWARD HOWE
申请号：
GB201312808
公开号：
GB2516282A
申请日:
2013.07.17
申请国别(地区):
GB
年份:
2015
代理人:
摘要：
A method of calibration of a stereoscopic camera system 10 for use with a radio therapy treatment apparatus (linac) 14 is provided. Initially a calibration phantom 18 is positioned on an adjustable table 20 on the surface of a mechanical couch 16 with the phantom's centre at an estimated location for the radiation iso-centre. The phantom is then irradiated using the linac and the relative location of the centre of the calibration phantom and the radiation iso-centre is determined by analysing images of the irradiation of the phantom. The phantom is repositioned by the mechanical couch applying an offset corresponding to the determined relative location. The stereoscopic camera system obtains images of the relocated phantom to which the offset has been applied and processes them to set its co-ordinate system relative to the radiation iso-centre. A 3D computer model may be created of the surface of the phantom.
