Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation , pleural effusion or pneumothorax . Heart size is top normal , unchanged . The appearance of the mediastinum is unchanged from ___ and likely represents a combination fo mild ascending aortic enlargement and mediastinal fat . Surgical clips project over the upper abdomen .
    OUTPUT:
    
No pneumonia , edema , or effusion .