Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left base opacity is re - demonstrated and there may be a trace left pleural effusion . No large pleural effusion is seen . Subtle right base opacity is re - demonstrated . Overall , there is no significant interval change and findings may represent chronic aspiration . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Relatively stable bibasilar opacities may relate to chronic aspiration .