Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Marked elevation of the left hemidiaphragm is stable . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Subtle opacity at the base of the left lung is likely related to bronchovascular crowding as demonstrated on the prior chest CT . No focal consolidation is identified No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .