Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made to the next preceding similar study obtained two hours earlier during the same day . The patient remained intubated , the ETT in unchanged position . The same holds for the previously described left subclavian approach central venous line . Heart size is unchanged . No pneumothorax has developed . A new parenchymal density exists now in the right upper lobe area with typical concave contours indicating atelectasis . The minor fissure is mildly elevated , but as it leaves a triangular - shaped free segment , it is noted that the atelectasis appears to be limited to the apical segment of the right upper lobe . Otherwise , no new pulmonary abnormalities with the exception of a small peripheral plate atelectasis in the left lower lobe laterally .
    OUTPUT:
    
Development of sizeable upper lobe apical segment atelectasis since next preceding portable chest examination . No pneumothorax . The referring physician , ___ . ___ , was paged at 3 :50 p .m .