Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , accentuating the mediastinum / cardiac silhouette and causing vascular crowding . Atelectasis the left lower lobe is mild . Hila are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No pneumonia , pleural effusions , or pulmonary edema .