Evaluation of lens dose in medulloblastoma radiotherapy

Authors

  • F. L. Oliveira Centro Regional de Ciências Nucleares (CRCN/CNEN-PE) e Departamento de Energia Nuclear, Universidade Federal de Pernambuco (DEN/UFPE)
  • S. A. Sousa Instituto de Radioterapia Waldemir Miranda (IRWAM)
  • F. F. Lima Centro Regional de Ciências Nucleares (CRCN/CNEN-PE)
  • E. C. Vilela Centro Regional de Ciências Nucleares (CRCN/CNEN-PE) e Departamento de Energia Nuclear, Universidade Federal de Pernambuco (DEN/UFPE)

Keywords:

medulloblastoma, radiotherapy, lens dose.

Abstract

The improvement of the applied radiotherapy techniques in the cranial-spinal therapy, which is used in the cases of meduloblastoma, aims the reduction of the risks of future damages in enclosed critical agencies in the irradiation fields. This work aims to evaluate the lens doses due two common techniques used in meduloblastoma radiotherapy. For this, termoluminescentes dosimeters, previously calibrated, were located in an anthropomorphic phantom (ALDERSON - RANDON Laboratory), in the tumor and lens positions. The employed techniques were as following: (1) angled fields technique and (2) half-beam block technique. The phantom was irradiated five times in each technique with two lateral opposed fields in the brain with a total prescribed dose of 1.5 Gy, followed of two posterior spinal fields with the same prescribed dose, using a 6MV accelerator. The results showed that the doses in the first technique were 0.10±0,04 Gy and, in second one, 0.09±0,02 Gy. It was observed that, independent of the employed technique, the lens doses practically are the same.

Author Biography

F. L. Oliveira, Centro Regional de Ciências Nucleares (CRCN/CNEN-PE) e Departamento de Energia Nuclear, Universidade Federal de Pernambuco (DEN/UFPE)


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How to Cite

Oliveira, F. L., Sousa, S. A., Lima, F. F., & Vilela, E. C. (2011). Evaluation of lens dose in medulloblastoma radiotherapy. Scientia Plena, 3(7). Retrieved from https://scientiaplena.org.br/sp/article/view/657

Issue

Vol. 3 No. 7 (2007): November/Novembro 2007

Section

Articles

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