Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous chest x ray from ___ and chest ct from ___ . There is a large right lower lung opacity , compatible with pleural effusion . Given relatively mild mediastinal shift to the left , there must be components of atelectasis in the right lower and right middle lobes with possible superimposed consolidation . The right upper lobe is grossly clear . Small left pleural effusion is also seen ; however , the left lung remains grossly clear . There is a rounded density projecting in the retrosternal clear space on the lateral . Cardiomediastinal silhouette is difficult to assess , however , is slightly shifted towards the left . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
New large right - sided pleural effusion with underlying atelectasis and possible consolidation in the middle and lower lobes . CT scan may offer additional detail of underlying parenchymal abnormalities . Small left - sided pleural effusion .