Characterization of Tissue Equivalent Materials Using 3D Printing for Patient-Specific DQA in Radiation Therapy

Three-dimensional printing technology has the advantage of facilitating construction complex three-dimensional shapes. For this reason, it is widely used in medical and radiological fields. However, few materials with high electron density similar to that bone exist for fabricating a human phantom. In study, commercially available filament were an FDM 3D printer perform delivery quality assurance (DQA) evaluated use. material, BaSO4 was synthesized five ratios 2%, 4%, 6%, 8%, 10% 40% PBAT 50~58% PLA. The material fabricated obtained using kV energy CT compared organs bones. radiation beam properties printed structures analyzed as films treatment linear accelerator. As result, by changing infill possible produce organs, homogeneous HU values ranging from 371 ± 9 1013 28 produced. developed study expected be usefully applied development patient-specific phantom evaluate accuracy radiotherapy.