Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged , but unchanged . The aortic knob calcifications are re- demonstrated , and the mediastinal and hilar contours are stable . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine . Surgical clip is seen within the right upper quadrant of the abdomen .
    OUTPUT:
    
No acute cardiopulmonary process .