Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Compared to prior , there is no change . Subtle opacity in the left suprahilar region is unchanged and as previously characterized . The lungs are otherwise clear . Rounded opacity over the right lung base laterally on one of the frontal views is most compatible with a nipple shadow . Streaky right basilar opacity is most likely atelectasis given low lung volumes . Trace bilateral effusions are identified . The cardiomediastinal silhouette is within normal limits . Atherosclerotic calcification is seen at the aortic arch . No acute osseous abnormalities identified .
    OUTPUT:
    
Trace bilateral effusions . Relatively linear right lower lung opacity on the frontal view is suggestive of atelectasis , especially given low lung volumes .