Estimation of conversion coefficients for absorbed and effective doses for pediatric CT examinations in two different PET/CT scanners
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2019
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Radiation Physics and Chemistry
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Normally, during medical procedures, special attention must be given to pediatric patients when compared to
adults. This is specially relevant during procedures involving ionizing radiation, as CT scans, given that children
are considerably more sensitive to radiation induced stochastic effects than adults. In order to investigate the
radiation doses on radiosensitive organs of pediatric patients, undergoing head, chest and abdomen CT procedures,
numerical dosimetry was employed in this work. The novelty is the use of a new set of pediatric virtual
anthropomorphic phantoms, coupled with Monte Carlo simulation, to determine the conversion coefficients for
absorbed and effective doses. Two CT equipment were simulated, taking into account the main characteristics of
those commercially available. The results were converted to conversion coefficients (mGy/100 mA) for several
organs and tissues, and the highest values were obtained for the newborn phantom. This numerical approach
employed a new and reliable technique for pediatric CT dosimetry.
Como referenciar
PERINI, ANA P.; SANTOS, WILLIAM S.; NEVES, LUCIO P.; BELINATO, WALMIR; CALDAS, LINDA V.E. Estimation of conversion coefficients for absorbed and effective doses for pediatric CT examinations in two different PET/CT scanners. Radiation Physics and Chemistry, v. 155, p. 9-16, 2019. SI. DOI: 10.1016/j.radphyschem.2018.07.009. Disponível em: http://repositorio.ipen.br/handle/123456789/29832. Acesso em: 13 May 2024.
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