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GTV delineation: PET & variability
Vesprini D. et al – Radiother Oncol. – 2010
Inter-observer variability
Intra-observer variability
•
10 GEJ ca undergoing RT
•
6 Radiation Oncologists
•
CT alone vs PET-CT (manual)
•
Median observer overlap
analysis
(bars = Observer Agreement
Index)
•
Plans using PET-CT
reduced
both interobserver and
intraobserver variability