Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided central venous catheter is unchanged . Heart size is stable . Heterogeneous right perihilar opacity is unchanged from ___ , representing pneumonia as seen on PET CT . Patchy bibasilar opacities likely reflect atelectasis . No pleural effusion .
    OUTPUT:
    
Unchanged right mid lung pneumonia as seen on recent PET CT .