Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains tortuous . Mediastinal and hilar contours are similar . Lungs are mildly hyperinflated with mild emphysematous changes again noted in the upper lobes . There is no pulmonary edema , focal consolidation , pleural effusion or pneumothorax . Patchy atelectasis is seen in both lung bases . There mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Normal heart size . Mild bibasilar atelectasis .