RT - Journal Article T1 - Radial dose functions of GZP6 intracavitary brachytherapy 60Co sources: treatment planning system versus Monte Carlo calculations JF - Int-J-Radiat-Res YR - 2008 JO - Int-J-Radiat-Res VO - 5 IS - 4 UR - http://ijrr.com/article-1-348-en.html SP - 181 EP - 186 K1 - Brachytherapy K1 - high dose rate (HDR) K1 - 60Co K1 - Monte Carlo. AB - Background: The Monte Carlo (MC) method is not only used for dose calculations around brachytherapy sources but also for benchmarking treatment planning systems (TPS) calculations. Materials and Methods: Three 60Co sources of GZP6 brachytherapy unit were simulated using MCNP4C MC Code. The radial dose functions were calculated by MC method and GZP6 TPS and were compared. Results: There was a good agreement between MC and TPS calculations for all sources. Discrepancies up to 10% were observed for points close to the sources, but for those farther than 7mm from source center, differences were less than 2% for all sources. Conclusion: Our results showed that GZP6 TPS calculations can accurately be used for dose calculations in brachytherapy treatments for points farther than 7mm from the source center. LA eng UL http://ijrr.com/article-1-348-en.html M3 ER -