Dosimetric characterization of a high dose rate I-192 source for brachytherapy application using Monte Carlo simulation and benchmarking with thermoluminescent dosimetry

作者：Bidmeshki N Babaei^*; Sohrabpour M; Mahdavi S R

来源：International Journal of Radiation Research, 2014, 12(3): 265-270.

• Brachytherapy
• Ir-192 flexisource
• MCNP calculation
• radiation dosimetry

Background: The purpose of this project was to derive the brachytherapy dosinnetric functions described by American Association of Physicists in Medicine (AAPM) TG-43 U1 based on high dose rate I-192 sources. Materials and Methods: The method utilized included both simulation of the designed Polynnethyl nnethacrylate (PMMA) phantom using the Monte Carlo of MCNP4C and benchnnarking of the simulation with thernnolunninescent (TL) dosimeters. Results: The obtained results for the radial dose function and anisotropy function showed nominal errors of less than 3% between TL measurements and the MCNP4C results. Conclusion: It may be concluded that due to small observed errors and the large uncertainty associated with the high dose gradients near the source point the simulation results can be used for dose estimation.

• 出版日期2014-7