An Analysis of correlation between AQA phantom and Radiation Treatment systems for CyberKnife

Abstract

This study analyzed the correlation using AQA pbantolTl and radiation treatment system, such as Xsight Lung system and skull tracking system, in CyberKnifc Radiosurgcry Systcm The AQA phantol11 is designed to check robot mastering daily by delivering a 2-patb lreatment to film. Tbis tecbnique can determine the translation targeting error, which is a combination of tracking and dclivcry CITor. We calculated the accuracy by eomparing the dose data of the targct eπor of the Xsight Lung traeking systcm and Skull tracking system and thc radial error of the AQA phantom in terms of radiatIon dose and distribution. The targcl error of the Xsight Lung systel11 increased in proportion to the radial error increase of the AQA phantom. The targel error of Xsight Lung system was 0.3 111m and 2.45 mm whiIe the radial error of AQA was 0.5 mm and 4 mm. This errors were judged from the geometric error of the robot and Targct Locating System(TLS).