Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided pacemaker device with leads terminating in the right atrium and right ventricle is in unchanged position . The heart remains mildly enlarged with dense mitral annular calcifications again seen . The mediastinal and hilar contours are unchanged , with mild tortuosity of the thoracic aorta noted . Lung volumes are low which causes crowding of the bronchovascular structures , and possible mild congestion but no overt pulmonary edema . Minimal streaky opacity in the right lung base likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . Multiple clips are demonstrated within the upper abdomen .
    OUTPUT:
    
Low lung volumes with patchy right basilar opacity , likely atelectasis .