Prog Med Phys.  2012 Sep;23(3):188-198.

Evaluation of Beam Modeling Using Collapsed Cone Convolution Algorithm for Dose Calculation in Radiation Treatment Planning System

• Jung JY
• Cho W
• Kim MJ
• Lee JW
• Suh TS

Abstract

This study aims to evaluate the accuracy of the collapsed cone convolution (CCC) algorithm for dose calculation in a treatment planning system (TPS), CorePLAN(TM). We implemented beam models for various setup conditions in TPS and calculated radiation dose using CCC algorithm for 6 MV and 15 MV photon beam in 50x50x50 cm3 water phantom. Field sizes were 4x4 cm2, 6x6 cm2, 10x10 cm2, 20x20 cm2, 30x30 cm2 and 40x40 cm2 and each case was classified as open beam cases and wedged beam cases, respectively. Generated beam models were evaluated by comparing calculated data and measured data of percent depth dose (PDD) and lateral profile. As a result, PDD showed good agreement within approximately 2% in open beam cases and 3% in wedged beam cases except for build-up region and lateral profile also correspond within approximately 1% in field and 4% in penumbra region. On the other hand, the discrepancies were found approximately 4% in wedged beam cases. This study has demonstrated the accuracy of beam model-based CCC algorithm in CorePLAN(TM) and the most of results from this study were acceptable according to international standards. Although, the area with large dose difference shown in this study was not significant region in clinical field, the result of our study would open the possibility to apply CorePLAN(TM) into clinical field.

Keyword

Dose calculation algorithm; Collapsed cone convolution; Treatment planning system; CorePLAN(TM); Beam model

MeSH Terms

Chlormequat
Hand
Water
Chlormequat
Water