Commercial filament testing for use in 3D printed phantoms
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2020
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Radiation Physics and Chemistry
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Resumo
There is a great demand for phantoms by many areas of knowledge to be used for teaching or daily work.
However, commercial phantoms are expensive and hard to obtain, especially in countries going through development.
As an alternative, 3D printing can be the way to produce less expensive and reliable 3D phantoms.
The goal of this study is to evaluate 14 available commercial filaments, in order to find if and how they can be
used in 3D printed phantoms in computed tomography. Each material was printed as a 2 cm edge cube with
rectilinear pattern and 60, 80 and 100% infill. The 80% infill of five other patterns were also printed and
compared. Each 100% infill cube was weighted and had its density calculated. After that, the cubes were scanned
in a Philips CT Brilliance 6 with 120 kVp, 200 mA, 2 mm slices and standard reconstruction. At the center of each
cube, a ~120 mm2 region of interest was set to measure the mean Hounsfield Unit (HU) and its standard
deviation. The software Origin was used to plot HU results for rectilinear pattern, determine linear trends with its
R2 and compare achieved values with HU tissue range from literature. To confirm the response of HU values of
selected tested materials in CT imaging as a function of percentage infill, a phantom prototype of a finger was 3D
printed. The HU of the tested materials ranged from −516.2 ± 7.3 to 329.8 ± 18.9. All human tissues could
be mimicked making use of these materials, except cortical bone above ~350 HU and tooth parts. The most
promising filament was PLA + Cu, due to the multiple infill configuration that allows the resulting HU range to
represent from adipose and skin tissue to marrow bone.
Como referenciar
SAVI, MATHEUS; ANDRADE, MARCO A.B.; POTIENS, MARIA P.A. Commercial filament testing for use in 3D printed phantoms. Radiation Physics and Chemistry, v. 174, p. 1-7, 2020. DOI: 10.1016/j.radphyschem.2020.108906. Disponível em: http://repositorio.ipen.br/handle/123456789/31424. Acesso em: 24 Apr 2024.
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.