Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is stable . Marked tortuosity of the thoracic aorta with diffuse atherosclerotic calcification is again demonstrated and similar in appearance to prior exam . The cardiomediastinal and hilar contours are stable . There is minimal scarring / atelectasis at the lung bases . No rib fractures are identified however the detection of nondisplaced rib fractures on chest radiograph is limited .
    OUTPUT:
    
No acute intrathoracic process . No rib fractures identified .