Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a mild left retrocardiac atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . No overt pulmonary edema is seen . The heart size is normal . The mediastinal and hilar contours are within normal limits . No acute osseous abnormality is seen .
    OUTPUT:
    
No acute cardiopulmonary process .