Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are very low . Bilateral interstitial abnormalities are compatible with known chronic interstitial lung disease . There is no definite new focal airspace opacity to suggest pneumonia . The heart is mildly enlarged . There is mild central pulmonary vascular congestion bilaterally but no frank pulmonary edema .
    OUTPUT:
    
1 . Low lung volumes and chronic interstitial lung disease . No definite evidence of pneumonia . 2 . Stable mild cardiomegaly