Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are unremarkable . Lung volumes are low with patchy opacities in the lung bases likely reflective of atelectasis . A small left pleural effusion is present . No pneumothorax is seen . There are no acute osseous abnormalities demonstrated . Clips are noted in the right upper quadrant of the abdomen .
    OUTPUT:
    
Small left pleural effusion with probable bibasilar atelectasis .