Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . When compared to most recent exam from ___ , there has been improvement in bibasilar opacities which was more prominent on the right than on the left . These , however , were not present in ___ . Superiorly , the lungs are clear . Cardiac silhouette is mildly enlarged . Dense atherosclerotic calcifications seen in the aorta . No acute osseous abnormality is identified .
    OUTPUT:
    
Persistent but improved bibasilar opacities compared to ___ . These could be in part due to scar or atelectasis given lower lung volumes although underlying infection or aspiration would be difficult to exclude .