Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One pacemaker lead is in the right atrium and the other is in the right ventricle . Mild cardiomegaly . The mediastinal and hilar contours are normal . Bibasilar atelectasis is slightly improved since yesterday . No focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
One pacemaker lead is in the right atrium and the other is in the right ventricle . No pneumothorax .