Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest was obtained . Cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Slight increased linear opacification at the right lung base may represent atelectasis or pneumonia in the correct clinical setting .
    OUTPUT:
    
Right basilar linear opacity which may represent atelectasis or pneumonia in the correct clinical setting .