Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are seen . There is a streaky left basilar opacity . Elsewhere , lungs are clear . Cardiomediastinal silhouette is within normal limits given rotation to the left . No acute osseous abnormalities .
    OUTPUT:
    
Left basilar opacity potentially atelectasis although infection can not be excluded . Consider PA and lateral if patient is amenable and if desired .