Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . There is persistent left basilar atelectasis with an associated small left pleural effusion . Streaky atelectasis in the right lower lung base is unchanged . No pneumothorax or pulmonary edema is seen . The cardiomediastinal contours are stable .
    OUTPUT:
    
Unchanged bibasilar atelectasis and small left pleural effusion .