Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Triangular opacity in the right lower lung is unchanged from ___ , likely due to prior wedge resection and epicardial fat pad . No evidence pneumonia or pulmonary edema . Postoperative mediastinum is stable from ___ . No pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .