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.
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.
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.
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Published online: April 21, 2014
Accepted: March 4, 2014
Received in revised form: February 12, 2014
Received: November 15, 2013
© 2014 Elsevier Ireland Ltd. Published by Elsevier Inc. All rights reserved.