Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Although technique and low lung volumes are somewhat limiting , there is a suggestion of mild interstitial abnormality . No focal opacification is visualized , however . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Slight interstitial abnormality . Pulmonary congestion could be considered versus an inflammatory airway process .