Dosimetric Accuracy of an HDR Brachytherapy Treatment Planning System for Different Irradiation Lengths with Monte Carlo Simulation

被引：0
|
作者：
Acun Bucht, Hediye [1 ]
Bozkurt, Ahmet [2 ]
Kemikler, Gonul [3 ]
机构：
[1] Harran Univ, Dept Biophys, Fac Med, Sanliurfa, Turkey
[2] Akdeniz Univ, Dept Biomed Engn, Fac Engn, Antalya, Turkey
[3] Istanbul Univ, Dept Med Phys, Inst Oncol, Istanbul, Turkey
来源：
TURK ONKOLOJI DERGISI-TURKISH JOURNAL OF ONCOLOGY | 2019年 / 34卷 / 01期
关键词：
Dose rate profile; HDR brachytherapy; Monte Carlo; TPS; DOSE-RATE BRACHYTHERAPY; IR-192; PLUS; 12I;
D O I：
10.5505/tjo.2019.1876
中图分类号：
R73 [肿瘤学];
学科分类号：
100214 ;
摘要：
OBJECTIVE The purpose of the present study was to verify calculated dose rate profiles of Ir-192 for four different irradiation lengths and various numbers of dwell positions by using treatment planning system (TPS) calculations and Monte Carlo (MC) simulations. METHODS Dose rate profiles per air-kerma strength in mu Gy m(2)/h (abbreviated as U) were calculated on transverse axis for irradiation lengths of 2, 3, 4, and 5 cm by Nucletron Oncentra TPS. The same irradiation scenarios were simulated with Monte Carlo N-Particle (MCNP) Transport Code. The MC and TPS calculated dose rate profiles were compared for all settings. RESULTS The difference between the calculated dose rate profiles by MC and TPS was found within 2% at an interval of 2 mm-8 cm away from the source for all irradiation lengths. The largest discrepancy of 5.2% was computed at a distance of 10 cm from the source for 5 cm irradiation length. CONCLUSION There is a good consistency between the calculated dose rate profiles by MCNP and Oncentra TPS. The deviation between the calculated dose rate values slightly increases as the distance from the source center increases >5 cm from the source, and its quantity depends on the number of dwell positions.
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页码：36 / 44
页数：9
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