Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is mild right basal atelectasis likely accounting for the subtle retrocardiac opacity on the lateral projection . Otherwise , no convincing signs of pneumonia , edema . No large effusion or pneumothorax . The cardiomediastinal silhouette appears normal . Subtle prominence of the right hilum may reflect bronchovascular crowding . Imaged bony structures appear intact .
    OUTPUT:
    
Mild right basal atelectasis .