Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The VP shunt is unchanged in position . There are bilateral pulmonary nodules , better characterized on ___ ___ . No evidence of pneumonia , pleural effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Small bilateral pulmonary nodules , better characterized on prior CT .