In this episode of Ars aequi, Emily and Max discuss several of the legal and ethical considerations of the ProCAncer-I project. ProCAncer-I is an EU Horizon 2020 funded research project aimed at developing advanced AI models to provide an effective tool in the diagnosis, metastases detection and prediction of prostate cancer. The ProCAncer-I aims to create the first European legally and ethically compliant, prostate-related medical imaging platform. Within this platform, both large-scale data and AI algorithms will coexist in the platform. Emily and Max discuss the legal challenges of anonymising medical images, the requirements in data protection for the processing of retrospective data and the collection of prospective data as well as the ethical considerations for processing medical images for research.