Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart size is normal . The mediastinal and hilar contours are unremarkable . There is persistent elevation of the right hemidiaphragm which is chronic . Linear opacities in the lung bases are compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Subsegmental atelectasis in the lung bases with chronic elevation of the right hemidiaphragm . No acute cardiopulmonary abnormality otherwise identified .