Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , the lung volumes have decreased . There is mild pulmonary edema . No significant pleural effusion is seen . Moderate cardiomegaly and enlarged mediastinum are stable . The Swan - Ganz catheter is at the pulmonary outflow tract . No pneumothorax .
    OUTPUT:
    
1 . Mild pulmonary edema . 2 . Swan - Ganz terminating at the pulmonary outflow tract . No pneumothorax .