therapy. © In this figure, an example of a biological phantom (3D in vitro model), made in collaboration with Dr. Bonani, (BIOTech, University of Trento, Italy) Figure: Aan example of a biological phantom (3D [...] been the Clinical Radiobiology Group Leader at the Helmholtz Research Center for Heavy Ion Research (GSI) in Darmstadt, Germany. Walter actively participates in various international organizations. He is [...] (3D in vitro model) In this figure, an example of a biological phantom (3D in vitro model), made in collaboration with Dr. Bonani, (BIOTech, University of Trento, Italy). The CHO cells are growing on silk