Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overall the examination is unchanged . No focal opacity to suggest pneumonia is seen . There may be mild vascular congestion ; however , no pulmonary edema . No pleural effusion or pneumothorax is seen . The heart size is top normal . There is mild tortuosity of the aorta . The pleural surface contours are normal .
    OUTPUT:
    
No acute intrathoracic process .