Medical Llama3 V2

🚀 医疗版Llama3-v2：针对医疗问答微调的Llama3模型

本项目提供了强大的Llama3 8B模型的微调版本，专门设计用于以丰富的信息回答医疗问题。它借助了AI医疗聊天机器人数据集（ruslanmv/ai-medical-chatbot）中的丰富知识。

🚀 快速开始

本模型可通过Hugging Face的Transformers库访问。

✨ 主要特性

• 专注医疗领域：针对健康相关问题进行了优化。
• 知识丰富：在全面的医疗聊天机器人数据集上进行训练。
• 文本生成能力：能够生成有信息价值且可能有帮助的回复。

📦 安装指南

使用pip安装所需库：

pip install transformers   bitsandbytes  accelerate

💻 使用示例

基础用法

以下是一个Python代码片段，展示了如何与Medical-Llama3-8B-16bit模型进行交互，并生成医疗问题的答案：

from transformers import AutoModelForCausalLM, AutoTokenizer, BitsAndBytesConfig
import torch

# Define BitsAndBytesConfig
bnb_config = BitsAndBytesConfig(load_in_4bit=True,
                                bnb_4bit_quant_type="nf4",
                                bnb_4bit_compute_dtype=torch.float16)

# Model name
model_name = "ruslanmv/Medical-Llama3-v2"

# Load tokenizer and model with BitsAndBytesConfig
tokenizer = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True, bnb_config=bnb_config)
model = AutoModelForCausalLM.from_pretrained(model_name, config=bnb_config)

# Ensure model is on the correct device
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
model.to(device)


# Define askme function
def askme(question):
    sys_message = ''' 
    You are Medical AI Assistant. Please be thorough and provide an informative answer. 
    If you don't know the answer to a specific medical inquiry, advise seeking professional help.
    '''   
    # Create messages structured for the chat template
    messages = [{"role": "system", "content": sys_message}, {"role": "user", "content": question}]
  
    # Applying chat template
    prompt = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
    inputs = tokenizer(prompt, return_tensors="pt", truncation=True, padding=True, max_length=1000)
    # Move inputs to device
    input_ids = inputs['input_ids'].to(device)
    attention_mask = inputs['attention_mask'].to(device)
    # Generate outputs
    with torch.no_grad():
        outputs = model.generate(input_ids=input_ids, attention_mask=attention_mask, max_length=1000, use_cache=True)
    # Extract and return the generated text, removing the prompt
    response_text = tokenizer.batch_decode(outputs, skip_special_tokens=True)[0]
    return response_text



# Example usage
question = '''I'm a 35-year-old male and for the past few months, I've been experiencing fatigue, 
increased sensitivity to cold, and dry, itchy skin. 
Could these symptoms be related to hypothyroidism? 
If so, what steps should I take to get a proper diagnosis and discuss treatment options?'''

print(askme(question))

答案示例如下：

Assistant:  You should consult a physician for a proper diagnosis and discussion of treatment options. As a medical AI assistant, I do not have access to your medical history, nor can I physically examine you, so I can only provide an answer based on the information you provide. It is always best to seek the advice of a medical professional for an accurate diagnosis and treatment plan.
That being said, the symptoms you have described could be related to hypothyroidism, which is a condition in which the thyroid gland does not produce sufficient hormone. Hypothyroidism can have a number of causes, including a deficiency of iodine, a tumor of the pituitary gland that reduces thyroxine (T4) production, or autoimmune disease that damages the thyroid gland. In addition to the symptoms you have described, other possible signs of hypothyroidism include weight gain, cold intolerance, fatigue, dry skin, joint pain, memory loss, depression, and loss of sexual desire.
To determine whether your symptoms are related to hypothyroidism, your physician will start by taking a history and performing a physical examination. He or she will also order several laboratory tests, including:
1. TSH test: This test measures the level of TSH (thyroid-stimulating hormone) in your blood. TSH stimulates the thyroid gland to produce T4. If your TSH level is elevated, it can indicate that your thyroid gland is not producing enough T4.
2. T4 test: This test measures the level of T4 in your blood. T4 is the main hormone produced by the thyroid gland. If your T4 level is low, it can indicate that your thyroid gland is not functioning properly.
3. T3 test: This test measures the level of T3 in your blood. T3 is another hormone produced by the thyroid gland. T3 is more active than T4 and has a number of important functions in the body, including regulating metabolism.
4. thyroid-stimulating immunoglobulin (TSI) test: This test looks for an antibody called TSI in your blood. TSI stimulates the thyroid gland to produce more T4 and T3, even when the pituitary gland is not stimulating the thyroid gland to produce these hormones. The presence of TSI can indicate autoimmune thyroiditis.
5. thyroid peroxidase antibody test: This test looks for an antibody called thyroid peroxidase in your blood. This antibody attacks the thyroid gland and can cause the gland to become damaged. The presence of this antibody can indicate autoimmune thyroiditis.
If any of these tests suggest that you have hypothyroidism, your physician may want to order additional tests to confirm the diagnosis. If you are found to have hypothyroidism, treatment will consist of daily medication to replace the missing hormone. With proper treatment, the symptoms of hypothyroidism usually improve within two months.

Google Colab使用

你可以通过以下链接在Google Colab中使用该模型： Chatbot-Medical-Llama3-v2.ipynb

📚 详细文档

重要提示

本模型仅用于提供信息，不能替代专业的医疗建议。如有任何医疗问题，请始终咨询合格的医疗保健提供者。

许可证

本模型根据Apache License 2.0进行分发（详情请参阅LICENSE文件）。

贡献

我们欢迎对本仓库进行贡献！如果您有改进建议或想法，请随时创建拉取请求。

免责声明

尽管我们努力提供有价值的回复，但不能保证模型输出的准确性。如需确切的医疗建议，务必咨询医生或其他医疗专业人员。

📄 许可证

本模型采用Apache License 2.0进行分发，详情请查看LICENSE文件。