CT-JMedRoBERTa

jmedroberta-base-manbyo-wordpiece

jmedroberta-base-manbyo-wordpiece is a Japanese RoBERTa-based model optimized for medical text understanding. It has been fine-tuned on CT-RATE-JPN, a large-scale dataset of Japanese chest CT reports, for multi-label classification of 18 common thoracic CT findings.

The model leverages the medical-domain vocabulary coverage of JMedRoBERTa and achieves strong and stable performance on Japanese radiology reports.

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Model Overview

• Base model: alabnii/jmedroberta-base-manbyo-wordpiece
• Task: Multi-label classification (18 abnormal findings)
• Training data: CT-RATE-JPN (Japanese translations of CT-RATE reports)
• Input: Japanese radiology reports
• Output: Probabilities (0–1) for each finding

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Usage

from transformers import AutoModelForSequenceClassification, AutoTokenizer
import torch

model_name = "alabnii/jmedroberta-base-manbyo-wordpiece"
model = AutoModelForSequenceClassification.from_pretrained(
    model_name,
    num_labels=18,
    problem_type="multi_label_classification"
)
tokenizer = AutoTokenizer.from_pretrained(model_name)

def infer(texts):
    inputs = tokenizer(texts, padding=True, truncation=True, return_tensors="pt")
    with torch.no_grad():
        logits = model(**inputs).logits
    return torch.sigmoid(logits)

texts = ["両肺に淡い浸潤影を認めます。"]
probs = infer(texts)

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License

• Trained on CT-RATE-JPN, released under CC BY-NC-SA
• Model weights and outputs are for non-commercial research use only

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Citation

Please cite the following when using this model or the dataset:

@misc{yamagishi2024ctrep,
  title={Development of a Large-scale Dataset of Chest Computed Tomography Reports in Japanese and a High-performance Finding Classification Model},
  author={Yosuke Yamagishi et al.},
  year={2024},
  eprint={2412.15907},
  archivePrefix={arXiv},
  primaryClass={cs.CL}
}

@misc{yamagishi2025modernber,
  title={ModernBERT is More Efficient than Conventional BERT for Chest CT Findings Classification in Japanese Radiology Reports},
  author={Yosuke Yamagishi et al.},
  year={2025},
  eprint={2503.05060},
  archivePrefix={arXiv},
  primaryClass={cs.CL}
}