Knee joints using 3D printers
CT Phantom Manufacturing and Utility Evaluation

In order to express a phantom similar to the human tissue equivalent, it was output using Skin, Fat, Soft issue, and Bone filament (Petella, Korea). In the case of the skin and soft issue filaments, it was made of PBT-based polymer and barium sulfate (BaSO4), and in the case of the Fat filament, it was made of gelatin. In the case of the Bone filament, additives such as calcium carbonate (CaCO3) were used to express radiation impermeability. For phantom production, (a) Skin, Fat, Soft issue, and Bone were divided and modeled through the AVIEWER model program using (c) personal information anonymized DIOCM file, and then converted to a 3mf file.

(b) The CT number was measured by setting the ROI of each part through a computed tomography (CT) of the radiomedical equipment for the phantom outputted through the converted file. (d) As a result, the CT number similar to the human tissue equivalent could be identified.