Medical Llama3 V2

🚀 醫療版Llama3-v2：針對醫療問答微調的Llama3模型

本項目提供了強大的Llama3 8B模型的微調版本，專門設計用於以豐富的信息回答醫療問題。它藉助了AI醫療聊天機器人數據集（ruslanmv/ai-medical-chatbot）中的豐富知識。

🚀 快速開始

本模型可通過Hugging Face的Transformers庫訪問。

✨ 主要特性

• 專注醫療領域：針對健康相關問題進行了優化。
• 知識豐富：在全面的醫療聊天機器人數據集上進行訓練。
• 文本生成能力：能夠生成有信息價值且可能有幫助的回覆。

📦 安裝指南

使用pip安裝所需庫：

pip install transformers   bitsandbytes  accelerate

💻 使用示例

基礎用法

以下是一個Python代碼片段，展示瞭如何與Medical-Llama3-8B-16bit模型進行交互，並生成醫療問題的答案：

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

你可以通過以下鏈接在Google Colab中使用該模型： Chatbot-Medical-Llama3-v2.ipynb

📚 詳細文檔

重要提示

本模型僅用於提供信息，不能替代專業的醫療建議。如有任何醫療問題，請始終諮詢合格的醫療保健提供者。

許可證

本模型根據Apache License 2.0進行分發（詳情請參閱LICENSE文件）。

貢獻

我們歡迎對本倉庫進行貢獻！如果您有改進建議或想法，請隨時創建拉取請求。

免責聲明

儘管我們努力提供有價值的回覆，但不能保證模型輸出的準確性。如需確切的醫療建議，務必諮詢醫生或其他醫療專業人員。

📄 許可證

本模型採用Apache License 2.0進行分發，詳情請查看LICENSE文件。