Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged . There are low lung volumes with crowding of the bronchovascular structures . No pulmonary edema is seen . Linear opacities in the left lung base are compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . Scarring within the left lung apex is re - demonstrated . No acute osseous abnormalities are detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Low lung volumes .