Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mild to moderately enlarged , unchanged . Mediastinal and hilar contours are similar . There is minimal upper zone vascular redistribution without overt pulmonary edema . Atelectasis is seen in the left lung base . Elevation of the right hemidiaphragm is unchanged . No pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Chronic elevation of right hemidiaphragm with left basilar atelectasis . No focal consolidation to suggest pneumonia .