Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New moderate right - sided pleural effusion with associated substantial volume loss of the right middle and right lower lobe . The left lung is clear . No overt pulmonary edema . Mild cardiomegaly . Note is made of an azygos fissure .
    OUTPUT:
    
New moderate right - sided effusion with substantial volume loss of the right middle and lower lobe . Superimposed infection can not be excluded .