Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable semi upright frontal chest radiograph demonstrates unchanged severe cardiomegaly and bilateral diffuse opacities compatible with moderate pulmonary edema . This is improved compared to chest radiograph from approximately 12 hours prior . Pleural effusions are minimal , if any . There is no pneumothorax . No definite focal consolidation identified .
    OUTPUT:
    
Moderate pulmonary edema , improved compared to chest radiograph from 12 hours prior . Unchanged severe cardiomegaly .