Back to Search
Start Over
Proposal for the delineation of neoadjuvant target volumes in oesophageal cancer.
- Source :
-
Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology [Radiother Oncol] 2021 Mar; Vol. 156, pp. 102-112. Date of Electronic Publication: 2020 Dec 05. - Publication Year :
- 2021
-
Abstract
- Purpose: To define instructions for delineation of target volumes in the neoadjuvant setting in oesophageal cancer.<br />Materials and Methods: Radiation oncologists of five European centres participated in the following consensus process: [1] revision of published (MEDLINE) and national/institutional delineation guidelines; [2] first delineation round of five cases (patient 1-5) according to national/institutional guidelines; [3] consensus meeting to discuss the results of step 1 and 2, followed by a target volume delineation proposal; [4] circulation of proposed instructions for target volume delineation and atlas for feedback; [5] second delineation round of five new cases (patient 6-10) to peer review and validate (two additional centres) the agreed delineation guidelines and atlas; [6] final consensus on the delineation guidelines depicted in an atlas. Target volumes of the delineation rounds were compared between centres by Dice similarity coefficient (DSC) and maximum/mean undirected Hausdorff distances (H <subscript>max</subscript> /H <subscript>mean</subscript> ).<br />Results: In the first delineation round, the consistency between centres was moderate (CTVtotal: DSC = 0.59-0.88; H <subscript>mean</subscript>  = 0.2-0.4 cm). Delineations in the second round were much more consistent. Lowest variability was obtained between centres participating in the consensus meeting (CTVtotal: DSC: p < 0.050 between rounds for patients 6/7/8/10; H <subscript>mean</subscript> : p < 0.050 for patients 7/8/10), compared to validation centres (CTVtotal: DSC: p < 0.050 between validation and consensus meeting centres for patients 6/7/8; H <subscript>mean</subscript> : p < 0.050 for patients 7/10). A proposal for delineation of target volumes and an atlas were generated.<br />Conclusion: We proposed instructions for target volume delineation and an atlas for the neoadjuvant radiation treatment in oesophageal cancer. These will enable a more uniform delineation of patients in clinical practice and clinical trials.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2020 Elsevier B.V. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1879-0887
- Volume :
- 156
- Database :
- MEDLINE
- Journal :
- Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology
- Publication Type :
- Academic Journal
- Accession number :
- 33285194
- Full Text :
- https://doi.org/10.1016/j.radonc.2020.11.032