Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or pneumothorax . Blunting of the left posterior costophrenic angle raises possibility of small effusion . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified . Surgical clip projects over the left upper quadrant .
    OUTPUT:
    
Possible small left pleural effusion . Otherwise unremarkable chest x-ray .