Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat low . The heart is borderline at the upper limits of normal size to slightly enlarged . The mediastinal and hilar contours appear within normal limits . The lungs are clear . There are no pleural effusions or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease . Borderline cardiomegaly .