Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ at 03 :22 , lung volumes are low and there are increased interstitial opacities on the right upper lung , concerning for pneumonia and less likely asymmetric pulmonary edema with atelectasis . Pleural effusion is small if any . Mild cardiomegaly is unchanged from ___ at 00 :27 p .m . and may be due to patient positioning . Right - sided central line terminates in right atrium , unchanged from prior .
    OUTPUT:
    
Right upper pneumonia , less likely asymmetric edema with atelectasis .