Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to priors , there has been no significant interval change . Again seen is persistent opacity at the left mid to lower lung laterally , some of which is likely due to underlying pleural effusion . Elsewhere the lungs are clear . Cardiac silhouette is difficult to assess given silhouetting of the left cardiac border . Atherosclerotic calcifications are noted in the thoracic aorta . Elsewhere the lungs are clear .
    OUTPUT:
    
No acute cardiopulmonary process . Persistent opacity at the left mid to lower lung likely in part due to an effusion . Please note that this has been a persistent finding and underlying mass lesion can not be excluded . Consider followup CT scan to further access on a nonurgent basis .