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Dosimetry of ionizing radiations with radiocromic materials

Grant number: 17/25535-5
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2018
Effective date (End): February 28, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal researcher:Oswaldo Baffa Filho
Grantee:Guilherme Nascimento Turato
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Dosimetric methods are needed to consistently and efficiently support advances in radiotherapy. In this sense, the current project covers the study and characterization of radiocromic materials for the purpose of clinical applications in the radiotherapy service. The dosimetric systems used will be 2D, in order to articulate with some research in the 3D area already developed by the group. Thus, the project enables the student to expose the processes and methods involved in the dosimetry of radiocromic materials and also aggregates data for what already exists in 3D. Having consolidated the study in the two-dimensional scope, it is intended to advance to the three-dimensional dosimetry. We aim to analyze 3 types of materials: EBT2 & EBT3 films, Presage dosimeter plates and gels produced by the group. After irradiating the materials, it is sought to analyze optical spectra of higher absorption, decay factor, obtain a calibration curve, analyze images from 2 different scanners, as well as develop a software to analyze the data. Finally, with direct application to radiotherapy, we seek to assess variables to verify if the dose lies within a tolerable level for the radiotherapy treatment.

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