Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The hilar and mediastinal contours are within normal limits . The central pulmonary vessels are engorged , with mild interstital edema . No focal consolidation , pneumothorax , or pleural effusion is detected .
    OUTPUT:
    
Mild central pulmonary vascular congestion and interstital edema . No pneumonia detected .