Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pigtail catheter sits in the right upper quadrant of the abdomen . The cardiomediastinal contours are normal and unchanged . Bibasilar opacities reflect components of atelectasis and pleural effusion which is seen tracking up along the major fissures on the lateral view . There is no pneumothorax . There is no subdiaphragmatic free air .
    OUTPUT:
    
Small bilateral pleural effusions with associated atelectasis , similar to the prior week 's radiograph .