{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,26]],"date-time":"2026-04-26T06:31:48Z","timestamp":1777185108864,"version":"3.51.4"},"reference-count":20,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2023,12,21]],"date-time":"2023-12-21T00:00:00Z","timestamp":1703116800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Radiotherapy dose predictions have been trained with data from previously treated patients of similar sites and prescriptions. However, clinical datasets are often inconsistent and do not contain the same number of organ at risk (OAR) structures. The effects of missing contour data in deep learning\u2010based dose prediction models have not been studied.<\/jats:p><\/jats:sec><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The purpose of this study was to investigate the impacts of incomplete contour sets in the context of deep learning\u2010based radiotherapy dose prediction models trained with clinical datasets and to introduce a novel data substitution method that utilizes automated contours for undefined structures.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We trained Standard U\u2010Nets and Cascade U\u2010Nets to predict the volumetric dose distributions of patients with head and neck cancers (HNC) using three input variations to evaluate the effects of missing contours, as well as a novel data substitution method. Each architecture was trained with the original contour (OC) inputs, which included missing information, hybrid contour (HC) inputs, where automated OAR contours generated in software were substituted for missing contour data, and automated contour (AC) inputs containing only automated OAR contours. 120 HNC treatments were used for model training, 30 were used for validation and tuning, and 44 were used for evaluation and testing. Model performance and accuracy were evaluated with global whole body dose agreement, PTV coverage accuracy, and OAR dose agreement. The differences in these values between dataset variations were used to determine the effects of missing data and automated contour substitutions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Automated contours used as substitutions for missing data were found to improve dose prediction accuracy in the Standard U\u2010Net and Cascade U\u2010Net, with a statistically significant difference in some global metrics and\/or OAR metrics. For both models, PTV coverage between input variations was unaffected by the substitution technique. Automated contours in HC and AC datasets improved mean dose accuracy for some OAR contours, including the mandible and brainstem, with a greater improvement seen with HC datasets. Global dose metrics, including mean absolute error, mean error, and percent error were different for the Standard U\u2010Net but not for the Cascade U\u2010Net.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Automated contours used as a substitution for contour data improved prediction accuracy for some but not all dose prediction metrics. Compared to the Standard U\u2010Net models, the Cascade U\u2010Net achieved greater precision.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mp.16898","type":"journal-article","created":{"date-parts":[[2023,12,21]],"date-time":"2023-12-21T19:55:51Z","timestamp":1703188551000},"page":"898-909","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Standardizing and improving dose predictions for head and neck cancers using complete sets of OAR contours"],"prefix":"10.1002","volume":"51","author":[{"given":"Jacob S.","family":"Buatti","sequence":"first","affiliation":[{"name":"Department of Radiation Oncology School of Medicine University of Texas Health Science Center at San Antonio  San Antonio Texas USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Neil","family":"Kirby","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology School of Medicine University of Texas Health Science 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Antonio Texas USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nikos","family":"Paragios","sequence":"additional","affiliation":[{"name":"Therapanacea  Paris 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