Carrageenan Biopolymer for Medical Ultrasonography using Phantom CIRSAnak Agung Aris Diartama, Suryono Suryono, Sugiyanto Sugiyanto, Putu Irma Wulandari, I Putu Eka Juliantara and Kadek Yuda AstinaE3S Web Conf., 202 (2020) 12001DOI: https://doi.org/10.1051/e3sconf/202020212001
