INVESTIGADORES
VALENTE Mauro Andres
artículos
Título:
Water-equivalence of gel dosimeters for radiology medical imaging
Autor/es:
VALENTE, M.; VEDELAGO, J.; CHACÓN, D.; MATTEA, F.; VELÁSQUEZ, J.; PÉREZ, P.
Revista:
APPLIED RADIATION AND ISOTOPES
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2018
ISSN:
0969-8043
Resumen:
International dosimetry protocols are based on determinations of absorbed dose to water. Ideally, the phantommaterial should be water equivalent; that is, it should have the same absorption and scatter properties as water.This study presents theoretical, experimental and Monte Carlo modeling of water-equivalence of Fricke andpolymer (NIPAM, PAGAT and itaconic acid ITABIS) gel dosimeters. Mass and electronic densities along witheffective atomic number were calculated by means of theoretical approaches. Samples were scanned by standardcomputed tomography. Photon mass attenuation coefficients and electron stopping powers were examined.Theoretical, Monte Carlo and experimental results confirmed good water-equivalence for all gel dosimeters.Overall variations with respect to water in the low energy radiology range (up to 130 kVp) were found to be lessthan 3% in average
