Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly with enlargement of the pulmonary vasculature and diffuse airspace opacities , suggestive of mild pulmonary edema . A more confluent opacity at the right lung base could reflect asymmetrical edema or secondary process such as pneumonia . No evidence pneumothorax . No significant pleural effusions .
    OUTPUT:
    
Moderate pulmonary edema . Underlying pneumonia in right lung base is difficult to exclude and follow - up radiograph after diuresis is recommended .