Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA upright and lateral chest radiograph demonstrates a large right pleural effusion . This appears to have been present on prior study dated ___ , slightly increased in size . There are scattered airspace opacities throughout the left lung field new since prior study . The left aerated lung appears clear . There is a small left pleural effusion . Cardiac border is obscured . Aortic arch calcifications are noted .
    OUTPUT:
    
Larger right pleural effusion , increased in size minimally since prior study dated ___ . Small left pleural effusion . Patchy airspace opacities in the left lung field is predominantly perihilar . Etiologies are broad and include infection , pulmonary edema , less likely pulmonary hemorrhage .