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Validation of radiologically tissue-equivalent materials

Grant number: 17/23034-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2018
Effective date (End): December 31, 2018
Field of knowledge:Physical Sciences and Mathematics - Physics - Nuclear Physics
Principal researcher:Paulo Roberto Costa
Grantee:Bruna Costa Nascimento
Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil


In Brazil, currently indispensable measuring instruments for the activities of quality control and dosimetry of medical equipment, such as ionization chambers, voltage and time of exposure meters, as well as the phantoms are mostly imported and of high cost. In addition, the few national materials available do not cover all the needs of the internal market in this area, reinforcing the need for imports. The same is true of tissue simulators that must be used in quality control routines and radiological protection in Medicine. The general objective of this work is supporting the characterization of phantoms with transmission and scattering properties equivalent to human tissue for dose studies of patients in the range of radiation energies used in diagnostic imaging. The materials to be evaluated are being developed in the Productivity Project in Technological Development and Extension CNPq / DT of the advisor / proponent. These materials do not have national similarities, and even those available on the market outside Brazil are not adequately characterized for a good representation of attenuation and scattering properties of ionizing radiation in the range of energies used in diagnostic imaging (5-150 keV). In this way, the relevance of this work is concentrated in the domain of the elaboration and the characterization of these types of materials, as well as in the construction of prototypes that will be validated experimentally. With this, the student, besides having the opportunity to familiarize herself with experimental techniques, can participate in the productive process of these potential products. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FRIMAIO, AUDREW; NASCIMENTO, BRUNA C.; BARRIO, RAMON M. M.; CAMPOS, LETICIA L.; COSTA, PAULO R. X-ray spectrometry applied for determination of linear attenuation coefficient of tissue-equivalent materials. Radiation Physics and Chemistry, v. 160, p. 89-95, JUL 2019. Web of Science Citations: 3.

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