Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: General underpenetration , likely due to body habitus . Cardiomegaly , as before . Low lung volumes . There is hilar congestion and mild diffuse interstitial pulmonary edema . There are likely new opacities in the lower lobes , potentially concerning for pneumonia . The mediastinal and hilar contours are normal . No definite pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . Stable cardiomegaly with mild pulmonary edema . 2 . Lower lung opacities are increased from prior and difficult to exclude pneumonia .