RaTE-NER-Deberta

This model is a fine-tuned version of DeBERTa on the RaTE-NER dataset.

Model description

This model is trained to serve the RaTEScore metric, if you are interested in our pipeline, please refer to our paper and Github.

This model also can be used to extract Abnormality, Non-Abnormality, Anatomy, Disease, Non-Disease in medical radiology reports.

Usage

Click to expand the usage of this model.

from transformers import AutoTokenizer, AutoModelForTokenClassification
import torch
def post_process(tokenized_text, predicted_entities, tokenizer):
    entity_spans = []
    start = end = None
    entity_type = None
    for i, (token, label) in enumerate(zip(tokenized_text, predicted_entities[:len(tokenized_text)])):
        if token in ["[CLS]", "[SEP]"]:
            continue
        if label != "O" and i < len(predicted_entities) - 1:
            if label.startswith("B-") and predicted_entities[i+1].startswith("I-"):
                start = i
                entity_type = label[2:]
            elif label.startswith("B-") and predicted_entities[i+1].startswith("B-"):
                start = i
                end = i
                entity_spans.append((start, end, label[2:]))
                start = i
                entity_type = label[2:]
            elif label.startswith("B-") and predicted_entities[i+1].startswith("O"):
                start = i
                end = i
                entity_spans.append((start, end, label[2:]))
                start = end = None
                entity_type = None
            elif label.startswith("I-") and predicted_entities[i+1].startswith("B-"):
                end = i
                if start is not None:
                    entity_spans.append((start, end, entity_type))
                start = i
                entity_type = label[2:]
            elif label.startswith("I-") and predicted_entities[i+1].startswith("O"):
                end = i
                if start is not None:
                    entity_spans.append((start, end, entity_type))
                start = end = None
                entity_type = None
    if start is not None and end is None:
        end = len(tokenized_text) - 2
        entity_spans.append((start, end, entity_type))
    save_pair = []
    for start, end, entity_type in entity_spans:
        entity_str = tokenizer.convert_tokens_to_string(tokenized_text[start:end+1])
        save_pair.append((entity_str, entity_type))
    return save_pair

def run_ner(texts, idx2label, tokenizer, model, device):
    inputs = tokenizer(texts, 
                    max_length=512,
                    padding=True, 
                    truncation=True, 
                    return_tensors="pt").to(device)
    with torch.no_grad():
        outputs = model(**inputs)
    predicted_labels = torch.argmax(outputs.logits, dim=2).tolist()
    save_pairs = []
    for i in range(len(texts)):
        predicted_entities = [idx2label[label] for label in predicted_labels[i]]
        non_pad_mask = inputs["input_ids"][i] != tokenizer.pad_token_id
        non_pad_length = non_pad_mask.sum().item()
        non_pad_input_ids = inputs["input_ids"][i][:non_pad_length]
        tokenized_text = tokenizer.convert_ids_to_tokens(non_pad_input_ids)
        save_pair = post_process(tokenized_text, predicted_entities, tokenizer)
        if i == 0:
            save_pairs = save_pair
        else:
            save_pairs.extend(save_pair)
    return save_pairs
ner_labels = ['B-ABNORMALITY', 'I-ABNORMALITY', 
              'B-NON-ABNORMALITY', 'I-NON-ABNORMALITY', 
              'B-DISEASE', 'I-DISEASE', 
              'B-NON-DISEASE', 'I-NON-DISEASE', 
              'B-ANATOMY', 'I-ANATOMY', 
              'O']
idx2label = {i: label for i, label in enumerate(ner_labels)}
tokenizer = AutoTokenizer.from_pretrained('Angelakeke/RaTE-NER-Deberta')
model = AutoModelForTokenClassification.from_pretrained('Angelakeke/RaTE-NER-Deberta')
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
model.to(device)
model.eval()
texts = ['Status median sternotomy.']
save_pair = run_ner(texts, idx2label, tokenizer, model, device)
 

Author

Author: Weike Zhao

If you have any questions, please feel free to contact [email protected].

Citation

@article{zhao2024ratescore,
  title={RaTEScore: A Metric for Radiology Report Generation},
  author={Zhao, Weike and Wu, Chaoyi and Zhang, Xiaoman and Zhang, Ya and Wang, Yanfeng and Xie, Weidi},
  journal={arXiv preprint arXiv:2406.16845},
  year={2024}
}