Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear left basilar opacities are noted . Persistent blunting of the left posterior costophrenic angle suggests persistent small effusion . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities
    OUTPUT:
    
Persistent small left effusion and left basilar atelectasis .