Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Improved lung volumes particularly at the right lung base . Heterogeneous right middle lobe opacity may represent continued sequela of aspiration . Left lung is clear . Cardiomediastinal silhouette is normal .
    OUTPUT:
    
Continued heterogeneous opacity of the right middle lobe may represent continued sequela of aspiration . Interval improvement in lung volumes . Small right pleural effusion .