Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison film , ___ . There is no evidence for pneumothorax . The position of the various support lines and tubes is unchanged . There has been no significant change since the prior chest x-ray of ___ . Bilateral effusions are present , also unchanged .
    OUTPUT:
    
No change since prior chest x-ray . No pneumothorax .