Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Mild cardiomegaly is unchanged . Mediastinal clips and sternotomy wires are unchanged . There is right basilar atelectasis . No pleural effusion or pneumothorax . The cardiomediastinal and hilar contours are stable .
    OUTPUT:
    
No free air . Right basilar atelectasis .