Dose estimate for cone beam CT equipment protocols using Monte Carlo simulation in computational adult anthropomorphic phantoms
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Radiation Physics and Chemistry
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Cone beam computed tomography (CBCT) has become essential for dental diagnoses in the last decade. This is
supported by its low cost and low doses, when compared to medical CT. Following this increase in CBCT
procedures, it is necessary to ensure the image quality within low radiation doses to the patients. This is an
especially difficult challenge in CBCT, given the number of equipment models (more than 50), radiographic
techniques that may be employed, and technical information not available to the users by the manufacturers.
The objective of this study was to estimate the cancer risk, effective and absorbed doses in tissues and organs for
CBCT protocols intended for dental use. Monte Carlo (MC) simulations were used to estimate these quantities in
tissues and organs with radiological importance, as those suggested by the International Commission of
Radiological Protection (ICPR) report ICRP 103. Five different fields of view (FOV) were simulated to i-Cat
Classic CBCT, using the MCNPX code. The virtual anthropomorphic phantoms FASH3 (Female Adult MeSH) and
MASH3 (Male Adult MeSH) were also used. The effective dose estimative was in the range 75.15–142.20 μSv.
The largest contribution to the effective dose was from the salivary glands (17%), thyroid (27%) and remainder
tissues (28%). The results of this work showed that the effective and absorbed doses in tissues/organs vary
according to the FOV, exposure parameters, and the positioning of the beam, relative to the radiosensitive
organs. Furthermore, for the same exposure conditions, women can exceed the total risk of cancer by 26–34%,
when compared to men.
Como referenciar
SOARES, MARIA R.; SANTOS, WILLIAM S.; NEVES, LUCIO P.; PERINI, ANA P.; BATISTA, WILSON O.G.; BELINATO, WALMIR; MAIA, ANA F.; CALDAS, LINDA V.E. Dose estimate for cone beam CT equipment protocols using Monte Carlo simulation in computational adult anthropomorphic phantoms. Radiation Physics and Chemistry, v. 155, p. 252-259, 2019. SI. DOI: 10.1016/j.radphyschem.2018.06.038. Disponível em: http://repositorio.ipen.br/handle/123456789/29830. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.