Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Moderate left pleural effusion with adjacent atelectasis is unchanged . Right base atelectasis is unchanged . No pneumothorax or evidence for pulmonary edema . Heart size and cardiomediastinal contours are stable . No radiopaque foreign body .
    OUTPUT:
    
Moderate left pleural effusion with bibasilar atelectasis , similar to prior . No pneumothorax .