This Part of YY 0831 specifies the scope, terms, definitions, requirements, and test methods of the multi-source stereotactic radiotherapy system with gamma beam for head lesion. This Part applies to the multi-source stereotactic radiotherapy system with gamma beam for head lesion. The system simultaneously uses multiple 60Co sealed radioactive sources (it may be dynamic or static) to conduct beaming.5.6.2 Positioning reference pointa#39;s deviation calculation According to following steps to conduct positioning accuracy calculation: a) Utilizing the film processing method in 5.4. Calculate 50% dose value of the film; b) Draw 50% dose curve.
|Title||:||YY 0831.1-2011: Translated English PDF of Chinese Standard YY0831.1-2011|
|Publisher||:||www.ChineseStandard.net - 2015-02-02|