Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is mildly enlarged . The mediastinal contour is unremarkable . There is crowding of the bronchovascular structures with mild pulmonary edema . No large pleural effusion or pneumothorax is seen . Retrocardiac and right basilar patchy opacities likely reflect atelectasis . There are no acute osseous abnormalities identified .
    OUTPUT:
    
Low lung volumes with mild pulmonary edema and probable bibasilar atelectasis .