The Effect of Breast Reconstruction Prosthesis on Photon Dose Distribution in Breast Cancer Radiotherapy
Publish place: Iranian Journal of Medical Physics، Vol: 14، Issue: 4
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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JR_IJMP-14-4_009
تاریخ نمایه سازی: 18 تیر 1398
Abstract:
Introduction: Siliconeprosthetic implants are commonlyutilizedfor tissue replacement and breast augmentation after mastectomy. On the other hand, some patients require adjuvant radiotherapy in order to preventlocal-regional recurrence and increment ofthe overall survival. In case of recurrence, the radiation oncologist might have to irradiate the prosthesis.The aim of this study was to evaluate the effect of silicone prosthesis on photon dose distribution in breast radiotherapy. Materials and Methods: The experimental dosimetry was performed using theprosthetic breast phantom and the female-equivalent mathematical chest phantom. A Computerized Tomographybased treatment planning was performedusing a phantom and by CorePlan Treatment Planning System (TPS). For measuring the absorbed dose, thermoluminescent dosimeter(TLD) chips (GR-207A) were used. Multiple irradiations were completed for all the TLD positions, and the dose absorbed by the TLDs was read by a lighttelemetry (LTM) reader. Results: Statistical comparisons were performed between the absorbed dosesassessed by the TLDs and the TPS calculations forthe same sites. Our initial resultsdemonstratedanacceptable agreement (P=0.064) between the treatment planning data and the measurements. The mean difference between the TPS and TLD resultswas 1.99%.The obtained findings showed that radiotherapy is compatible withsilicone gel prosthesis. Conclusion: It could be concludedthat the siliconbreast prosthesis has no clinicallysignificant effectondistribution of a 6 MV photon beam for reconstructed breasts.
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Authors
fatemeh sari
Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Seyed Rabi Mahdavi
Dept. of Medical Physics, Faculty of Medicine, Iran University of Medical Sciences
Robab Anbiaee
Associate Professor, Department of Radiotherapy and Oncology, Shaheed Beheshti University of Medical Sciences, Tehran, Iran
Alireza Shirazi
Department of Medical Physics, Tehran University of Medical Science, Tehran, Iran