Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no pleural effusion or pneumothorax . Bibasilar atelectasis , left greater than right is appreciated . There is no focal airspace consolidation to suggest pneumonia . There is mild interstitial edema . Accounting for technique , the heart size is normal . The mediastinal contour is unremarkable . Surgical clips are seen overlying the right neck .
    OUTPUT:
    
Mild interstitial edema .