Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Please note indication was for small bowel obstruction but a chest radiograph was ordered . Small left pleural effusion identified with bibasilar opacifications . Findings are somewhat similar to ___ radiograph and likely chronic , though can not exclude an infectious process . Cardiomediastinal contours are unremarkable . No pneumothorax or pneumoperitoneum evident . No osseous abnormality identified .
    OUTPUT:
    
Small left pleural effusion with bibasilar opacifications likely chronic in nature , though can not exclude infectious process .