Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes accentuate the cardiac silhouette and bronchovascular structures . Postoperative changes related to left lower lobe segmental resection appear similar with mild volume loss and focal scarring in this region . Persistent patchy opacity in right infrahilar region likely represents crowding of vessels related to low lung volumes with similar appearance in this region on low lung volume portable radiograph of ___ .
    OUTPUT:
    
Low lung volumes . Probable atelectasis in right infrahilar region and less likely focal pneumonia .