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Variations in head and neck treatment plan quality assessment among radiation oncologists and medical physicists in a single radiotherapy department

Cagni, Elisabetta, Botti, Andrea, Rossi, Linda, Iotti, Cinzia, Iori, Mauro, Cozzi, Salvatore, Galaverni, Marco, Rosca, Ala, Sghedoni, Roberto, Timon, Giorgia, Spezi, Emiliano and Heijmen, Ben 2021. Variations in head and neck treatment plan quality assessment among radiation oncologists and medical physicists in a single radiotherapy department. Frontiers in Oncology - Radiation Oncology 11 , 706034. 10.3389/fonc.2021.706034

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Abstract

Background: Agreement between planners and treating radiation oncologists (ROs) on plan quality criteria is essential for consistent planning. Differences between ROs and planning medical physicists (MPs) in perceived quality of head and neck cancer plans were assessed. Materials and methods: Five ROs and 4 MPs scored 65 plans for in total 15 patients. For each patient, the clinical plan (CLIN) and 2 or 4 alternative plans, generated with automated multi-criterial optimization (MCO), were included. There was always one MCO plan aiming at maximally adhering to clinical plan requirements, while the other MCO plan(s) had a lower aimed quality. Scores were given from 1-7, 1-2: not acceptable, 3-5: acceptable if further planning would not resolve perceived weaknesses, 6-7: straightway acceptable. One MP and one RO repeated plan scoring for intra-observer variation assessment. Results: For the 36 unique observer pairs, the median percentage of plans for which the two observers agreed on plan score (100%=65 plans) was 27.7% [6.2,40.0]. In the repeat scoring, agreements between first and second scoring were 52.3% and 40.0%. With a binary division between unacceptable (scores 1,2) and acceptable (3-7) plans, the median inter-observer agreement percentage was 78.5% [63.1,86.2], while intra-observer agreements were 96.9% and 86.2%. There were no differences in observed agreements between RO-RO, MP-MP and RO-MP pairs. Agreements for the highest-quality, automatically generated MCO plans were higher than for the CLIN plans. Conclusions: Inter-observer differences in plan quality scores were substantial and could result in inconsistencies in generated treatment plans. Agreements among ROs were not better than between ROs and MPs, despite large differences in training and clinical role. High-quality automatically generated plans showed best score agreements.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Additional Information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Publisher: Frontiers
Date of First Compliant Deposit: 11 October 2021
Date of Acceptance: 30 August 2021
Last Modified: 26 Sep 2022 08:26
URI: https://orca.cardiff.ac.uk/id/eprint/144778

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