Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The orientation of the tracheostomy tube is unchanged . The heart size is stable and enlarged . Left pleural effusion appears unchanged and right parenchymal opacities have improved since the prior . Multiple minimally displaced bilateral rib fractures are again noted . No pneumothorax .
    OUTPUT:
    
Interval improvement in parenchymal opacities , particularly at the right lung base , with continued left pleural effusion and minimally displaced bilateral rib fractures .