Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacity projecting over the right mid lung field corresponds to congenital fusion of the right - sided ribs , unchanged . Lung volumes are low which accentuate the size of the cardiac silhouette which appears mildly enlarged . Mediastinal and hilar contours are unremarkable . Crowding of the bronchovascular structures is noted without pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is present . Remote left - sided rib fractures are re- demonstrated . Diffuse idiopathic skeletal hyperostosis is again seen in the thoracic spine .
    OUTPUT:
    
Low lung volumes without acute cardiopulmonary abnormality .