Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are minimal left lower lobe postsurgical changes identified . Otherwise , the lungs are grossly clear without evidence of focal consolidation or pleural effusion , pneumothorax , or pulmonary edema . The heart size is normal . Mediastinal contours are normal .
    OUTPUT:
    
Stable , left lower lobe postsurgical changes . No radiographic evidence for acute cardiopulmonary process .