Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle . The heart size is mildly enlarged . The aorta is slightly unfolded . Mediastinal and hilar contours are unchanged . Calcification within the medial aspect of the right upper lung field likely reflects a calcified granuloma . There is minimal atelectasis at the lung bases . No focal consolidation , pleural effusion or pneumothorax is seen . Lungs are hyperinflated suggestive of underlying COPD . There is no pulmonary vascular engorgement . Remote right - sided rib fractures are present .
    OUTPUT:
    
Mild bibasilar atelectasis .