Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large loculated right pleural effusion appears similar to the recent study with dominant 7 .5 cm loculated component laterally in the right mid-to - lower hemithorax . Adjacent area of contiguous pleural fluid extending to the right mediastinal contour has slightly improved , however . Circumferential right pleural opacity which likely represents a combination of pleural thickening and fluid is otherwise unchanged . Volume loss persists in the right hemithorax . Heart remains enlarged and there is persistent mediastinal widening on the right . Left lung is grossly clear , and there is no evidence of left pleural effusion .
    OUTPUT:
    
Slight decrease in large right loculated pleural effusion , possibly due to hemothorax given provided clinical history .