Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Low lung volumes are seen . There is asymmetric left basilar opacity compared to the right . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities are detected on this limited exam .
    OUTPUT:
    
Low lung volumes with asymmetric left basilar opacity . While this could be due to atelectasis , infection would also be possible . Consider PA and lateral views for improved characterization .