Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Allowing for technique , the cardiac , mediastinal and hilar contours appear within normal limits . There is a mild to moderate diffuse interstitial abnormality which is not specific but could be seen with atypical pneumonia , interstitial pulmonary edema or perhaps extensive airway inflammation . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild to moderate interstitial abnormality with diffuse distribution .