Target volume delineation variation in radiotherapy for early stage rectal cancer in the Netherlands
- Nijkamp, Jasper
- de Haas-Kock, Danielle F. M.
- Beukema, Jannet C.
- Neelis, Karen J.
- Woutersen, Dankert
- Ceha, Heleen
- Rozema, Tom
- Slot, Annerie
- Vos-Westerman, Hanneke
- Intven, Martijn
- Spruit, Patty H.
- van der Linden, Yvette
- Geijsen, Debby
- Verschueren, Karijn
- van Herk, Marcel B.
- Marijnen, Corrie A. M.
Publication date
January 2012
DOIAbstract
The aim of this study was to measure and improve the quality of target volume delineation by means of national consensus on target volume definition in early-stage rectal cancer.The CTV's for eight patients were delineated by 11 radiation oncologists in 10 institutes according to local guidelines (phase 1). After observer variation analysis a workshop was organized to establish delineation guidelines and a digital atlas, with which the same observers re-delineated the dataset (phase 2). Variation in volume, most caudal and cranial slice and local surface distance variation were analyzed.The average delineated CTV volume decreased from 620 to 460 cc (
Add to ORKG