Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Retrocardiac opacity is likely a combination of small pleural effusion and atelectasis . The mediastinal and hilar contours are mildly enlarged , likely due to increased pulmonary pressure . No pneumothorax is seen . Two pacemaker leads project over the heart . The enteric tube is the upper stomach . There are no acute osseous abnormalities . ETT tip is approximately 3 .6 cm from the carina .
    OUTPUT:
    
1 . ETT tip approximately 3 .6 cm from the carina . 2 . Retrocardiac opacity , likely atelectasis and small pleural effusion .