Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Central venous catheter remains in a standard position , and cardiomediastinal contours are within normal limits and without change . Bibasilar confluent opacities persist , involving the left lower lobe to a much greater degree than the right . Considering relatively rapid development and distribution , this most likely represents an aspiration pneumonia . A component of coexisting atelectasis is likely as well . As compared to the recent study , opacities have slightly worsened at both bases with associated increased obscuration of the hemidiaphragms , with complete lack of visibility on the left . Small - to - moderate left pleural effusion has also apparently increased in size .
    OUTPUT:
    
Slight worsening of bibasilar opacities , concerning for aspiration pneumonia . Small - to - moderate left pleural effusion .