Professor Eric Deutsch is a radiation oncologist and specialist in therapeutic innovations applied to tumor irradiation. He is the head of the Gustave Roussy Radiotherapy Department and leads the Institute's "Teaching and University Relations" division. With a doctorate in Radiobiology, Eric Deutsch is a professor of oncology-radiotherapy at the University of Paris-Saclay, where he teaches oncology and radiobiology. Head of the Inserm 1030 joint research unit "Molecular Radiotherapy and Therapeutic Innovation", Prof. Deutsch's research work is devoted to the study of the combination of new anticancer drugs with radiotherapy. His interest is focused on understanding the biological effects of radiotherapy, the interaction of the tumor with its microenvironment and the mechanisms of cell death. More recently, he has developed a research activity dedicated to radiomics and artificial intelligence in order to personalize treatments by radiotherapy combined with immunotherapy. Eric Deutsch is strongly involved in early clinical trials and in gastrointestinal cancers.