Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable allowing for differences in technique . The parenchyma appears in general better aerated , but there is persistent right lower lung opacity suggesting a combination of atelectasis and possibly pleural effusion , although findings are very similar to prior CT and radiographs from ___ . More recent radiographs did not include lateral views , but an attempt to compare the lateral view to the prior chest CT shows perhaps a more bulging contour to the pleural effusion in the right lower hemithorax than before , although not necessarily larger . This appearance suggests evolving loculation of a likely small chronic effusion . Adjacent parenchymal opacity on the lateral view does not necessarily appear increased . Regarding rib findings , although not well delineated on more recent prior radiographs , non-united discontinuities of the right seventh and eighth ribs were already present before and probably unchanged .
    OUTPUT:
    
Overall improved aeration of the lungs . Persistent patchy opacities and pleural effusion in the right lower hemithorax with volume loss , but suspected to represent baseline chronic findings .