Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperinflated . The heart is mild - to - moderately enlarged but unchanged since of ___ . There is no strong evidence for pulmonary edema . There are no pleural effusions . No pneumothorax or focal airspace consolidation . The mediastinal contours are unremarkable .
    OUTPUT:
    
Unchanged mild to moderate cardiomegaly .