Unit:
Κατεύθυνση Ιατρική Φυσική-ΑκτινοφυσικήLibrary of the School of Health Sciences
Author:
Petrou Konstantinos-Dimitrios
Supervisors info:
Πλατώνη Καλλιόπη, Επίκουρη Καθηγήτρια, Ιατρική Σχολή, ΕΚΠΑ (επιβλέπουσα)
Ευστάθιος Ευσταθόπουλος, Καθηγητής, Ιατρική Σχολή, ΕΚΠΑ
Βασίλειος Κουλουλίας, Καθηγητής, Ιατρική Σχολή, ΕΚΠΑ
Original Title:
Monte Carlo modeling of the Millennium 120-leaf multiLeaf collimator for 3D-CRT, IMRT and VMAT calculations
Translated title:
Monte Carlo modeling of the Millennium 120-leaf multiLeaf collimator for 3D-CRT, IMRT and VMAT Calculations
Summary:
The aim of this study was the development of the Varian Millennium 120- leaf multileaf collimator (MLC) using Monte Carlo (MC) simulation techniques. The goal was to investigate whether the MC model of Millennium 120-leaf MLC can be used for patient specific quality assurance tests.
Initially, MLC simulation was created by compiling code on the Gate plat- form. For the experimental verification of the model, the values of the trans- mitting radiation from the MLC leaves (measured and calculated) and the lateral dose distribution (measured and calculated) from MLC defined photon static fields were compared. For leakage’s measurements in the clinical linear accelerator, radiochromic films and PMMA slab phantom were used while dose profiles were measured with an ionization chamber in water phantom.
By comparing the results, it was observed that the calculated and measurements values were found in good agreement. The results showed a good correlation with corresponding values from relevant publications. The next step is to optimize the MLC simulation to minimize deviations between mea- sured and calculated values so that MLC modelling can be used for treatment planning calculations.
Main subject category:
Health Sciences
Keywords:
Radiotherapy, Monte Carlo, VitalBeam, Multileaf collimator, GATE
