Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Retrocardiac opacities more conspicuous on the current exam . While some of this could be technical , underlying consolidation atelectasis and or effusion are also possible . There is a probable right pleural effusion . Superiorly , the right lung is clear . The cardiac silhouette is enlarged as is the right hilum , similar compared to prior . Right shoulder arthroplasty changes in subluxations appear chronic .
    OUTPUT:
    
More dense retrocardiac opacity potentially technical although underlying atelectasis and possible effusion is suspected . Small right pleural effusion . Consider PA and lateral to further characterize these findings .