Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Heart size is moderately enlarged . Mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures but no overt pulmonary edema is present . No focal consolidation , pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes . No radiographic evidence for pneumonia .