Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right IJ - approach Swan - Ganz catheter again terminates deep within a right pulmonary artery . A previously seen loop within the right ventricle has been resolved . There remains a smaller loop , likely coiled within the main pulmonary artery . A left - sided intracardiac device is unchanged in position . There is no pneumothorax . A left retrocardiac opacity is minimally changed , likely reflecting atelectasis .
    OUTPUT:
    
A Swan - Ganz catheter again terminates deep within a right pulmonary artery . A ventricular loop has been resolved . There remains a smaller loop likely within the main pulmonary artery .