Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is chronic elevation of left hemidiaphragm . Aside from linear atelectasis at the lung bases bilaterally , the lungs are clear . Bronchiectasis and scarring at the lung bases is chronic , likely from prior infection . No pleural effusion or pneumothorax . Heart size and mediastinal contours are normal .
    OUTPUT:
    
No evidence of pneumonia .