Radiomics Model to Predict Early Progression of Nonmetastatic Nasopharyngeal Carcinoma after Intensity Modulation Radiation Therapy: A Multicenter Study   A machine-learning radiomic model based on pretreatment MRI findings has potential in the identification of patients with nonmetastatic nasopharyngeal carcinoma who are at risk for early disease progression after primary treatment.     Richard Du, Victor H. Lee... Varut Vardhanabhuti