Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly improved when compared to the prior study . . There is a persistent small left pleural effusion with left lower lobe atelectasis . Minimally atelectasis at the right lung base with likely a small right - sided pleural effusion . The cardiomediastinal contour is within normal limits . No pneumomediastinum appreciated on this study . No pneumothorax seen . The visualized bony structures are unremarkable in appearance . Oral contrast material is seen within the large bowel in the left upper quadrant .
    OUTPUT:
    
Interval improvement in the left basilar atelectasis with a small residual left pleural effusion .