Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Relatively low lung volumes are noted . There is a hazy opacity at the left lung base , both laterally and posteriorly involving the costophrenic angles . Elsewhere , lungs are clear . The cardiomediastinal silhouette is within normal limits . No definite acute osseous abnormality identified .
    OUTPUT:
    
Low lung volumes . Left basilar opacity may be secondary to atelectasis . Consider repeat with improved inspiratory effort to further assess .