Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Partial collapse of right middle and lower lobes and associated pleural effusion has decreased in the interval . Overall aeration of the right lung base is improved . The left lung remains clear . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits and unchanged .
    OUTPUT:
    
Decreased right middle and lower lobe atelectasis and pleural fluid as compared to most recent prior . No pneumothorax .