Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Consolidation in the right lung base is compatible with rounded atelectasis identified on prior chest CT . Associated volume loss seen in the right hemi thorax . In addition , there is prominent pleural - based density tracking along the right hemi thorax , potentially due to pleural effusion . Left lung is clear . The cardiomediastinal silhouette is stable . No acute osseous abnormalities identified .
    OUTPUT:
    
Persistent right basilar opacity compatible with rounded atelectasis . Pleural - based density thought to be at least in part due to pleural effusion which is new since ___ .