Title:Predicting the Prognosis of Lung Cancer Patients Treated with Intensitymodulated
Radiotherapy based on Radiomic Features
Volume: 20
Author(s): Helong Wang, Jing Xu, Yanling Bai, Yewei Wang, Wencheng Shao, Weikang Yun, Lina Feng*Jianyu Xu*
Affiliation:
- Department of Radiation Physics, Harbin Medical University Cancer Hospital, Haping Road 150, Nangang District, Harbin, Heilongjiang 150081,
China
- Department of Radiation Physics, Harbin Medical University Cancer Hospital, Haping Road 150, Nangang District, Harbin, Heilongjiang 150081,
China
Keywords:
Lung cancer, CT, Predict, Intensity-modulated radiotherapy, Radiomic features, Response.
Abstract:
Aims:
This study aimed to develop a method for predicting short-term outcomes of lung cancer patients treated with intensity-modulated radiotherapy
(IMRT) using radiomic features detected through computed tomography images.
Methods:
A prediction model was developed based on a dataset of radiomic features obtained from 132 patients with lung cancer receiving IMRT.
Dimension reduction was performed for the features using the maximum-relevance and minimum-redundancy (mRMR) algorithm, and the least
absolute shrinkage and selection operator (LASSO) regression model was utilized to optimize feature selection for the IMRT-sensitivity prediction
model. The model was constructed using binary logistic regression analysis and was evaluated using the concordance index (C-index), calibration
plots, receiver operating characteristic curve, and decision curve analysis.
Results:
Fifty features were selected from 1348 radiomic features using the mRMR method. Of these, three radiomic features were selected by LASSO
logistic regression to construct the radiomics nomogram. The C-index of the model was 0.776 (95% confidence interval: 0.689–0.862) and 0.791
(95% confidence interval: 0.607–0.974) in the training and validation cohorts, respectively. Decision curve analysis showed that the radiomics
nomogram was clinically useful.
Conclusion:
Radiomic features have the potential to be applied to predict the short-term efficacy of IMRT in patients with inoperable lung cancer.