Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart size is normal . The aorta is mildly tortuous . Mediastinal and hilar contours are otherwise unremarkable . There is crowding of the bronchovascular structures but no pulmonary edema is present . There is eventration of the right hemidiaphragm . No focal consolidation , pleural effusion or pneumothorax is seen . There are mild atelectatic changes noted at the lung bases .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .