An institutional experience: quality assurance of a treatment planning system on electron beam

OBJECTIVES This study aims to application of the IAEA TRS-430 QA procedures of Eclipse (TM) v7.5 TPS for electron energies. In addition, the trends of the deviations found in the conducted tests have been determined. METHODS The calculations of TPS and measurements irradiations of the treatment device have been compared. As a result, the local dose deviation values and their confidence limit values have been obtained. RESULTS All confidence limit values were detected that it was increased depending on expanding depth. But each confidence limit values were found to show different change depending on expanding field size. Results of CT based inhomogeneity corrections and complex surface shapes tests were found outside tolerances, especially delta 3. CONCLUSION The QA of our clinic's TPS has been done and it has been found that there aren't drawbacks in its use in treatment. Only the errors found in our study for the parameters used in treatment planning has to be considered.