Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the earlier chest radiograph , there has been interval removal of the right - sided pigtail catheter . No change in the right IJ central line . The endotracheal tube projects 3 .1 cm above the carina . Multifocal opacities have improved since the prior study . There are likely small bilateral effusions . Incidental note is made of lumbar spinal fusion hardware and an IVC filter .
    OUTPUT:
    
Improvement of multifocal opacities suggests the underlying process could be due to aspiration .