Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal with mild unfolding of the thoracic aortic arch . Left hilar contour is normal . Right hilar contour is not well assessed due to presence of a moderate right pleural effusion which was partially visualized on the same day outside CT examination . This right pleural effusion appears partially loculated on CT from earlier today . Increased adjacent densities may be secondary to compressive atelectasis though infection is not excluded . There is mild linear left base atelectasis . There is no pneumothorax .
    OUTPUT:
    
Partially loculated right pleural effusion . Adjacent compressive atelectasis , can not exclude pneumonia . Small pneumoperitoneum better assessed on CT .