Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is borderline at the upper limits of normal size . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . Patchy basilar opacities suggesting minor atelectasis are noted . Otherwise , the lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .