Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are better expanded compared to the previous study . Left heart border is partially obscured by a moderate sized pleural effusion . Although the size of the effusion appears to be have slightly improved , inspiratory differences , make an accurate assessment difficult . Although the presence of infilterates / consoldiation overlying the effusion can never be excluded , no infilterates are noted . Multiple left - sided rib fracture are again noted . No pneumothorax .
    OUTPUT:
    
No significant changes compared to the prior study .