Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . Moderate atherosclerotic calcifications of the aortic arch are again seen . Trace pleural effusions are unchanged . A smooth opacity projecting over the lateral lower right lung base appears more pronounced since the ___ examination , and may represent a loculated effusion . There is no pneumothorax .
    OUTPUT:
    
Right basal - lateral opacity appears slightly more prominent since ___ , and may represent a loculated effusion .