Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are demonstrated . There is subsemental atelectasis of the right lower lobe . The lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax is seen . The heart is top normal in size . The cardiac and mediastinal silhouettes are unremarkable . Redemonstrated is right sixth rib atypical morphology and shortened appearance without underlying fracture .
    OUTPUT:
    
No acute cardiopulmonary process .