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Automated Prediction of Complete Pathological Response to Neo-Adjuvant Chemoradiotherapy Using Hybrid Model -Based MRI Radiomics in Locally Advanced Cervical Cancer
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  • hua yang,
  • yinan xu,
  • mohan dong,
  • jie gong,
  • dong huang,
  • ying zhang,
  • shuiping gou,
  • minwen zheng,
  • lichun wei,
  • lina zhao
mohan dong
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dong huang
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ying zhang
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shuiping gou
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minwen zheng
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lichun wei
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lina zhao

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Background: To develop a model that could automatically predict treatment response (pathologic complete response (pCR or non-pCR) for patients with locally advanced cervical cancer (LACC) based on T2-weighted MR images and clinical parameters. Methods: A total of 138 patients were en-rolled, T2-weighted MR images and clinical information of the patients before treatment were collected. Clinical information includes age, stage, pathological type, squamous cell carcinoma (SCC) level, and lymph node status. A hybrid model extracted the domain specific features from computational radiomics system, the abstract features from deep learning network and the clinical parameters, and employed an ensemble learning classifier to predict pCR. The area under curve (AUC), accuracy (ACC), true positive rate (TPR), true negative rate (TNR) and precision were used as evaluation metrics. Results: Among 138 LACC patients, 74 were in the pCR group and 64 were in the non-pCR group. There was no significant difference between the two cohorts in terms of tumor diameter, lymph node and stage before radiotherapy, p=0.787, 0.068, 0.846, respectively. The average AUC, ACC, TPR, TNR and precision of the proposed hybrid model was about 0.80, 0.71, 0.75, 0.66 and 0.71, while The AUC values of using clinical parameters, domain specific features, abstract features alone were 0.61, 0.67 and 0.76, respectively. The AUC value of model without ensemble learning classifier was 0.76. Conclusions: The proposed hybrid model could predict well the treatment response of patients with LACC, which might help radiation oncologist to make personalized treatment plans for patients.
Nov 2022Published in International Journal of Radiation Oncology*Biology*Physics volume 114 issue 3 on pages e94. 10.1016/j.ijrobp.2022.07.879