Application of a Tandem system for HVL evaluation in computed tomography
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Radiation Physics and Chemistry
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Computed tomography (CT) is a method of imaging used for the diagnosis and treatment of diseases. Different
from the conventional diagnostic radiology equipment, where the test for the determination of the half value
layer (HVL) is recommended, in CT equipment due to its geometry, the determination of the HVL is a difficult
task and is usually only provided by the manufacturer. The effective energy of a beam is determined by definition,
by means of HVL determination. When HVL values are not easily determined, as in the case of CT, it is
possible to evaluate the effective energy of the beam through a system consisting of the use of different energy
dependent dosimeters, where the ratio between the calibration curve responses in energy can provide the effective
energy of the beam (Tandem system). The system used in this work for the evaluation of HVL in computed
tomography is composed of groups formed by an ionization chamber of the pencil-type and cylindrical
absorber layers of aluminum and Polymethyl methacrylate (PMMA).
Como referenciar
FONTES, LADYJANE P.; CORREA, EDUARDO L.; POTIENS, MARIA da P.A. Application of a Tandem system for HVL evaluation in computed tomography. Radiation Physics and Chemistry, v. 155, p. 62-64, 2019. DOI: 10.1016/j.radphyschem.2018.08.023. Disponível em: http://repositorio.ipen.br/handle/123456789/29953. 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.