Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is noted with leads terminating in the regions of the right atrium , right ventricle , and coronary sinus . Heart size remains moderately enlarged . The mediastinal and hilar contours are unremarkable . Mild pulmonary vascular congestion is noted . No focal consolidation is present , and a retrocardiac patchy opacity likely reflects atelectasis . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes noted in the thoracic spine . On the lateral view , 5 rounded densities measuring up to 16 mm are noted within the anterior upper abdomen , likely external to the patient given their relatively uniform appearance .
    OUTPUT:
    
Moderate cardiomegaly with mild pulmonary vascular congestion . Mild retrocardiac atelectasis . 5 rounded densities projecting over the upper abdomen on the lateral view only , likely external to the patient given their uniform appearance .