Phantoms play an essential role in medical physics, particularly for radiation dose verification, yet the high cost of commercial standard phantoms often limits their availability. This study aimed to reconstruct a thoracic phantom as a replica of the human chest cavity using simple and low-cost materials. The reconstruction process began with evaluating the density values of the selected materials: cadaver bone was used as a substitute for human bone, styrofoam for lung tissue, and plasticine for soft tissues such as muscle and fat. Density measurements showed that cadaver bone ranged from +350 HU to +1000 HU, styrofoam from –700 HU to –950 HU, and plasticine from +39 HU to +234 HU. The skeletal-based reconstruction successfully represented the anatomical alignment of thoracic organs, as confirmed by CT simulator imaging. These findings indicate that the reconstructed thoracic phantom provides a feasible and cost-effective alternative to expensive commercial phantoms and can be effectively utilized for radiation dose verification in medical physics applications.
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