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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