Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prior CXR from ___ . Mild vascular congestion and rigth basilar opacity . Early interstitial pulmonary edema . Cardiomediastinal silhouette and hila are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild edema . Right lower opacity might represent atelectasis or early PNA .