Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is evidence of healing of multiple right rib fractures . There is evidence of pleural thickening on the right . There is persistent increased density at the lateral aspect of the right lung base likely due to posttraumatic extrapleural or pleural changes . Minimal streaky density at the lung bases and in the right upper lobe is consistent with scarring and possibly subsegmental atelectasis . The patient is status post median sternotomy and MVR . The aorta is tortuous and calcified . Mediastinal structures are stable . The bony thorax is grossly intact .
    OUTPUT:
    
Posttraumatic change in the right hemi thorax . Status post MVR . Bilateral subsegmental atelectasis or scarring . No evidence of pneumonia .