Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes bilaterally with stable mild left lower lobe atelectasis . No new focal opacity , pneumothorax , pleural effusion or pulmonary edema . Heart is mildly enlarged with normal mediastinal contour and hila . No bony abnormality .
    OUTPUT:
    
Chronic stable mild left lower lobe atelectasis .