Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are slightly low volume . As before , the right hemidiaphragm is elevated . The is mild cardiomegaly , unchanged compared with ___ . The appearance of the lungs is also unchanged . Possible mild crowding of vessels in the right cardiophrenic region with increased density posteriorly is unchanged compared with ___ and could be related to the elevated hemidiaphragm . No superimposed infiltrate is identified . No pleural effusion or pneumothorax detected . Mild degenerative changes in thoracic spine are similar to prior . Right upper quadrant surgical clips noted .
    OUTPUT:
    
Doubt significant change compared with ___ . Mild cardiomegaly and crowding of vessels in the right cardiophrenic region -- question atelectasis -- again noted