Ines Joye1, Maarten Lambrecht1, David Jegou2, Eszter Hortobágyi1, Pierre Scalliet3, Karin Haustermans4. 1. Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Belgium; Department of Oncology, KU Leuven, Belgium. 2. Department of Research, Belgian Cancer Registry, Brussels, Belgium. 3. Department of Radiation Oncology, Université Catholique de Louvain, Brussels, Belgium. 4. Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Belgium; Department of Oncology, KU Leuven, Belgium. Electronic address: karin.haustermans@uzleuven.be.
Abstract
BACKGROUND AND PURPOSE: Quality assurance (QA) for radiation treatment has become a priority since poorly delivered radiotherapy can negatively influence patient outcome. Within a national project we evaluated the feasibility of a central review platform and its role in improving uniformity of clinical target volume (CTV) delineation in daily practice. MATERIAL AND METHODS: All Belgian radiotherapy departments were invited to participate and were asked to upload CTVs for rectal cancer treatment onto a secured server. These were centrally reviewed and feedback was given per e-mail. For each five consecutive patients per centre, the overlap parameter dice coefficient (DC) and the volumetric parameters volumetric ratio (RV) and commonly contoured volume (VCC) were calculated. RESULTS: Twenty departments submitted 1224 eligible cases of which 909 were modified (74.3%). There was a significant increase in RV and VCC between the first ten patients per centre and the others. This was not seen for DC. Statistical analysis did not show a further significant improvement in delineation over the entire review period. CONCLUSION: Central review was feasible and increased the uniformity in CTV delineation in the first ten rectal cancer patients per centre. The observations in this study can be used to optimize future QA initiatives.
BACKGROUND AND PURPOSE: Quality assurance (QA) for radiation treatment has become a priority since poorly delivered radiotherapy can negatively influence patient outcome. Within a national project we evaluated the feasibility of a central review platform and its role in improving uniformity of clinical target volume (CTV) delineation in daily practice. MATERIAL AND METHODS: All Belgian radiotherapy departments were invited to participate and were asked to upload CTVs for rectal cancer treatment onto a secured server. These were centrally reviewed and feedback was given per e-mail. For each five consecutive patients per centre, the overlap parameter dice coefficient (DC) and the volumetric parameters volumetric ratio (RV) and commonly contoured volume (VCC) were calculated. RESULTS: Twenty departments submitted 1224 eligible cases of which 909 were modified (74.3%). There was a significant increase in RV and VCC between the first ten patients per centre and the others. This was not seen for DC. Statistical analysis did not show a further significant improvement in delineation over the entire review period. CONCLUSION: Central review was feasible and increased the uniformity in CTV delineation in the first ten rectal cancerpatients per centre. The observations in this study can be used to optimize future QA initiatives.
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