IGRT 2016 Madrid

With the exception of a few early studies:

• Marks et al 1976 • Daily films for Hodgkin Lymphoma patients • Comfortable immobilization is a must (or 16% error incidence) • Errors can be due to (1) movement of the patient and (2) movement of external land- marks in relation to internal anatomy. • Stopped using films after the study ! • “Perhaps, daily treatment films should be required in cases in which a precise treatment setup is necessary”