Surface dose measurement with Gafchromic EBT3 film for intensity modulated radiotherapy technique

被引：4

作者：

Akbas, Ugur ^{[1
]}

Kesen, Nazmiye Donmez ^{[1
]}

Koksal, Canan ^{[1
]}

Okutan, Murat ^{[1
]}

Demir, Bayram ^{[2
]}

Becerir, Hatice Bilge ^{[1
]}

机构：

[1] Istanbul Univ, Oncol Inst, Dept Med Phys, Istanbul, Turkey

[2] Istanbul Univ, Sci Fac, Dept Phys, Istanbul, Turkey

来源：

3RD INTERNATIONAL CONFERENCE ON THEORETICAL AND EXPERIMENTAL STUDIES IN NUCLEAR APPLICATIONS AND TECHNOLOGY (TESNAT 2017) | 2017年 / 154卷

关键词：

PHOTON BEAMS;

D O I：

10.1051/epjconf/201715401011

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Accurate dose measurement in the buildup region is extremely difficult. Studies have reported that treatment planning systems (TPS) cannot calculate surface dose accurately. The aim of the study was to compare the film measurements and TPS calculations for surface dose in head and neck cancer treatment using intensity modulated radiation therapy (IMRT). IMRT plans were generated for 5 head and neck cancer patients by using Varian Eclipse TPS. Quality assurance (QA) plans of these IMRT plans were created on rando phantoms for surface dose measurements. EBT3 films were cut in size of 2.5 x 2.5 cm(2) and placed on the left side, right side and the center of larynx and then the films were irradiated with 6 MV photon beams. The measured doses were compared with TPS. The results of TPS calculations were found to be lower compared to the EBT3 film measurements at all selected points. The lack of surface dose calculation in TPS should be considered while evaluating the radiotherapy plans.

引用

页数：3

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