Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is apparent elevation of the right hemidiaphragm with right lower lobe opacity most consistent with atelectasis . Left lung is clear . No left pleural effusion . Heart size , mediastinal contour , and hila are unremarkable . No pneumothorax . Limited assessment of the osseous structures demonstrates a sclerotic focus along the anterolateral right eighth rib , unchanged since prior examination .
    OUTPUT:
    
1 . Apparent elevation of the right hemidiaphragm , likely due to increased , chronic right subpulmonic effusion . 2 . Right lower lobe atelectasis . 3 . Sclerotic focus along anterolateral right eighth rib is unchanged in appearance since ___ and likely sequelae of prior rib fracture .