Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual chamber pacemaker device is noted with leads terminating the right atrium and right ventricle . The heart is mild to moderately enlarged . Aorta is tortuous with diffuse atherosclerotic calcifications again seen . There are low lung volumes with crowding of the bronchovascular structures and probable mild pulmonary vascular congestion . Bibasilar airspace opacities could reflect atelectasis though infection can not be completely excluded . There are small bilateral pleural effusions . No pneumothorax is present . No acute osseous abnormalities are identified .
    OUTPUT:
    
Bibasilar airspace opacities which could reflect atelectasis or infection with small bilateral pleural effusions . Low lung volumes and probable mild pulmonary vascular congestion .