Physics Bucharest 2017

Delineating the GTV- variation with person

Inter clinician variation • Variation observed between radiologist & radiation oncologists

Intra clinician variation • Variation seen with single observer • Training • Delineation workshops

Logue et al., Clinical variability of target volume description in conformal radiotherapy planning. Int J Radiat Oncol Biol Phys 1998, 41(4):929-931. Vinod S et al., Uncertainties in volume delineation in radiation oncology: A systematic review and recommendations for future studies. Radiotherapy and Oncology 2016