Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low compared to the previous study . Left - sided AICD device is noted with single lead terminating in unchanged position in the right ventricle . Heart size appears at least mildly enlarged . The mediastinal and hilar contours are unremarkable . There is crowding of the bronchovascular structures without overt pulmonary edema . Streaky opacities in the lung bases likely reflect areas of atelectasis . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis . No evidence of pulmonary edema .