Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and hilar contours are unremarkable . Linear opacities seen best anteriorly on the lateral view are probably right middle lobe atelectasis which could be due to obstruction from bronchial infection . Lateral view also suggests a 13 mm nodule projecting over the aorta just cephalad to the left hemidiaphragm . Pleural surfaces are normal .
    OUTPUT:
    
No pneumonia . Suggest elective PA and later chest radiographs in 4 weeks to examine possible lower lobe lung nodule . The images should be obtained during weekday hours and reviewed by a chest radiologist to see if oblique or other views are indicated then . ED QA nurses notified by email .