Abstract
Purpose: This prospective study investigated the incidence of radiation pneumonitis (RP) after immunotherapy followed by radiotherapy in non-small-cell lung cancer, analyzed the risk factors for RP, and explored the predictive performance of dosimetry and dosiomics. Methods & materials: Risk factors for grade ≥2 RP were calculated by using a logistic regression model. Predictive performance was compared on the basis of area under thecurvevalues. Results: Grade ≥2 RP occurred in 16 cases (26.7%). The AUC values of V5Gy, gray-level dependence matrix-small dependence high gray-level emphasis (GLDM-SDHGLE)and combined features were 0.685, 0.724and 0.734, respectively. Conclusion: Smoking history, bilateral lung V5Gyand GLDM-SDHGLE were independent risk factors for RP. Dosiomics can effectively predict RP.
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