Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP upright chest radiograph was obtained . Pulmonary edema is moderate to severe . A moderate left pleural effusion is moderate . Retrocardiac opacity obscures the left diaphragm contour . Surgical clips project over the right upper quadrant .
    OUTPUT:
    
Moderate to severe pulmonary edema . Retrocardiac opacity may represent atelectasis and / or consolidation .