Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is accentuated as a result , appearing mildly enlarged . Mediastinal and hilar contours are similar . Crowding of the bronchovascular structures is present without overt pulmonary edema . Streaky and patchy bibasilar opacities likely reflect areas of atelectasis in the setting of low lung volumes . No focal consolidation , large pleural effusion or pneumothorax is identified . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .