Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aorta is partly calcified . The mediastinal and hilar contours appear unchanged . Patchy right basilar opacity suggests minor atelectasis that is similar to perhaps minimally increased . Areas of slight pleural thickening at the right apex appear similar , suggesting prior scarring or perhaps minimal pleural plaque formation . There is no pleural effusion or pneumothorax . Mild degenerative changes along the thoracic spine are similar .
    OUTPUT:
    
No evidence of acute disease .