Course Aims To understand the need for TVD and planning nomenclatures for primary tumour, nodal regions and organs-at-risk in treatment planning and for treatment strategies such as IMRT and image guidance (IGRT) To appreciate the limitations of current imaging modalities for TVD and review ‘state-of-the art’ imaging modalities for TVD To explore the use of functional and molecular imaging in TVD for biological targets. To review the diagnostic imaging and therapy interface for image registration and verification as well as margin determination To promote interdisciplinary discussion between oncologists, physicists and technologists in small workgroups for GTV, CTV, PTV determination in selected tumour sites (e.g. CNS, H&N, thoracic and pelvis) These workshops will involve practical exercises with compulsory homework by all attendees and pre-course submission of homework via internet This course has been listed as one of the deliverables from the EU FP7-funded EurocanPlatform project. For information on EurocanPlatform visit: http://www.eurocanplatform.eu