Lensy Novitasari et al. 2026. Formulation and Characterization of Gypsum and Silicone-Based Materials Based on Hounsfield Unit Values as a Basis For Developing Anthropomorphic Phantoms on Ct-Scan. International Journal of Science and Environment (IJSE). 6, 4 (Nov. 2026), 451–465. DOI:https://doi.org/10.51601/ijse.v6i4.831.