ART-Plan introduces AI-powered tools, like Annotate, to optimize and standardize the process of organ-at-risk (OAR) segmentation in medical imaging. Annotate offers fully automatic annotation for CT, CBCT, and MR images, identifying over 100 organs and structures, including lymph nodes, using a pre-trained machine learning model. The technology combines deep learning with physician cognitive models to provide robust, guideline-compliant results that match the performance of human experts.