Deep learning for locally advanced nasopharyngeal carcinoma prognostication based on pre- and post-treatment MRI.
Comput Methods Programs Biomed
; 219: 106785, 2022 Jun.
Article
en En
| MEDLINE
| ID: mdl-35397409
ABSTRACT
PURPOSE:
We aimed to predict the prognosis of advanced nasopharyngeal carcinoma (stage â ¢-â £a) using Pre- and Post-treatment MR images based on deep learning (DL).METHODS:
A total of 206 patients with primary nasopharyngeal carcinoma who were diagnosed and treated at the Renmin Hospital of Wuhan University between June 2012 and January 2018 were retrospectively selected. A rectangular region of interest (ROI), which included the tumor area, surrounding tissues and organs, was delineated on each Pre- and Post-treatment MR image. Two Inception-Resnet-V2 based transfer learning models, named Pre-model and Post-model, were trained with the Pre-treatment images and the Post-treatment images, respectively. In addition, an ensemble learning model based on the Pre-model and Post-models was established. The three established models were evaluated by receiver operating characteristic curve (ROC), confusion matrix, and Harrell's concordance indices (C-index). High-risk-related gradient-weighted class activation mapping (Grad-CAM) images were developed according to the DL models.RESULTS:
The Pre-model, Post-model, and ensemble model displayed a C-index of 0.717 (95% CI 0.639 to 0.795), 0.811 (95% CI 0.745-0.877), 0.830 (95% CI 0.767-0.893), and AUC of 0.741 (95% CI 0.584-0.900), 0.806 (95% CI 0.670-0.942), and 0.842 (95% CI 0.718-0.967) for the test cohort, respectively. In comparison with the models, the performance of Post-model was better than the performance of Pre-model, which indicated the importance of Post-treatment images for prognosis prediction. All three DL models performed better than the TNM staging system (0.723, 95% CI 0.567-0.879). The captured features presented on Grad-CAM images suggested that the areas around the tumor and lymph nodes were related to the prognosis of the tumor.CONCLUSIONS:
The three established DL models based on Pre- and Post-treatment MR images have a better performance than TNM staging. Post-treatment MR images are of great significance for prognosis prediction and could contribute to clinical decision-making.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Neoplasias Nasofaríngeas
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Aprendizaje Profundo
Tipo de estudio:
Observational_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Humans
Idioma:
En
Año:
2022
Tipo del documento:
Article