Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is noted with leads terminating in the right atrium and right ventricle . The heart remains mildly to moderately enlarged . Aorta is tortuous and calcified , similar to the prior study . There is crowding of the bronchovascular structures due to low lung volumes . No pulmonary edema is present . Patchy opacities in both lung bases may reflect atelectasis . Calcified granuloma in the right upper lung field is unchanged . Anterior osteophytes are seen within the thoracic spine spine . No acute osseous abnormalities are detected .
    OUTPUT:
    
Low lung volumes with bibasilar patchy opacities possibly reflecting atelectasis . Infection can not be excluded .