Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are within normal limits . There is a tortuous thoracic aorta . The bilateral hila are within normal limits . Subtle opacification within the right lower lung likely represents basilar atelectasis . . There is no pulmonary vascular congestion . There is no pneumothorax or effusion .
    OUTPUT:
    
Subtle right basilar opacity most likely represents atelectasis . No definite focal consolidation . Tortuous aorta .