Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Low lung volumes are again noted . There is , however , asymmetric left basilar opacity , even more conspicuous on the lateral view . There is no effusion . The cardiomediastinal silhouette is unchanged . No acute osseous abnormality is identified .
    OUTPUT:
    
Low lung volumes . Asymmetric left basilar opacity which may be due to atelectasis given low lung volumes , however , infection is possible as well . Clinical correlation is advised .