TL and OSL dose response of LiF:Mg,Ti and Al2O3:C dosimeters using a PMMA phantom for IMRT technique quality assurance

Luciana C Matsushima; Glauco R Veneziani; Roberto K Sakuraba; José C Cruz; Letícia L Campos

doi:10.1016/j.apradiso.2015.02.005

TL and OSL dose response of LiF:Mg,Ti and Al2O3:C dosimeters using a PMMA phantom for IMRT technique quality assurance

Appl Radiat Isot. 2015 Jun:100:7-10. doi: 10.1016/j.apradiso.2015.02.005. Epub 2015 Feb 7.

Authors

Luciana C Matsushima¹, Glauco R Veneziani², Roberto K Sakuraba³, José C Cruz⁴, Letícia L Campos⁵

Affiliations

¹ Gerência de Metrologia das Radiações - Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Av. Prof. Lineu Prestes, 2242, Cidade Universitária, CEP: 05508-000 Sao Paulo, SP, Brazil. Electronic address: matsushima@usp.br.
² Gerência de Metrologia das Radiações - Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Av. Prof. Lineu Prestes, 2242, Cidade Universitária, CEP: 05508-000 Sao Paulo, SP, Brazil. Electronic address: venezianigr@gmail.com.
³ Sociedade Beneficente Israelita Brasileira - Hospital Albert Einstein (HAE), Avenida Albert Einstein, 665, Morumbi, CEP: 05652-000 Sao Paulo, SP, Brazil. Electronic address: rksakuraba@yahoo.com.br.
⁴ Sociedade Beneficente Israelita Brasileira - Hospital Albert Einstein (HAE), Avenida Albert Einstein, 665, Morumbi, CEP: 05652-000 Sao Paulo, SP, Brazil.
⁵ Gerência de Metrologia das Radiações - Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Av. Prof. Lineu Prestes, 2242, Cidade Universitária, CEP: 05508-000 Sao Paulo, SP, Brazil. Electronic address: lcrodri@ipen.br.

PMID: 25698672
DOI: 10.1016/j.apradiso.2015.02.005

Abstract

The principle of IMRT is to treat a patient from a number of different directions (or continuous arcs) with beams of nonuniform fluences, which have been optimized to deliver a high dose to the target volume and an acceptably low dose to the surrounding normal structures (Khan, 2010). This study intends to provide information to the physicist regarding the application of different dosimeters type, phantoms and analysis technique for Intensity Modulated Radiation Therapy (IMRT) dose distributions evaluation. The measures were performed using dosimeters of LiF:Mg,Ti and Al2O3:C evaluated by techniques of thermoluminescent (TL) and Optically Stimulated Luminescence (OSL). A polymethylmethacrylate (PMMA) phantom with five cavities, two principal target volumes considered like tumours to be treated and other three cavities to measure the scattered radiation dose was developed to carried out the measures.

Keywords: Al(2)O(3):C; LiF:Mg,Ti; OSL dosimetry; TL dosimetry.