A 3D ISODOSE STRUCTURE METHOD FOR CLINICAL DATA DISTRIBUTIONS COMPARISON IN PRETREATMENT PATIENT-QA

摘要

A method, which is alternative to the universally adopted gamma analysis, to compare in a patient treatment plan of radiotherapy, the measured radiation dose distribution with the dose distribution calculated by treatment planning system (TPS) software, wherein the operator selected isodose levels (i.e. the set of points or zones in a medium that receive the same dose of radiation) are converted into volumetric 3D structures that are properly used to value either the operator selected CRDVCs (Clinical Relevant Dose Volumetric Conditions) and their relative spatial correspondence thus detecting all the dose differences in organs at risk.(OARs) and in PTV (Planning Target Volume) that can be responsible for the inadequacy or the clinical unacceptability (i.e. undeliverability) of the radiotherapic treatment plan.