This is a 3,5 day course organised to attain a high level of understanding of the physics background of brachytherapy delivery and its technical aspects. The following items will be covered: - 3D Imaging and localisation in brachytherapy - Advanced 3D dose calculation incl. Monte Carlo methods, the grid based Boltzmann equation solver method and the collapsed cone superposition algorithm - Dose optimisation, evaluation, prescription and reporting - Experimental methods and dosimetry - Uncertainties and quality management - Outlook to expected technological advancements Extended practical, hands-on, sessions follow the lectures on all those thematic items.