In healthcare technology, the integration of Graph Retrieval-Augmented Generation (Graph RAG) models has revolutionized the way hospitals interact with patients. Healthcare chatbots powered by Graph RAG offer high-quality, personalized, and efficient services. By incorporating Graph RAG technology, these chatbots enhance patient care by providing swift access to vital information and optimizing hospital operations and staff management. This advancement leads to a more efficient healthcare environment, benefiting both patients and providers. For instance, doctors and nurses can swiftly review a patient’s medical history or previous test results through interactions with the chatbot, facilitating faster and more informed decision-making at the point of care.
What’s a Knowledge Graph?
A Knowledge Graph is a method to represent data in a structured way in the form of graphs, where entities, concepts, and their relationships are represented as nodes and edges.
- Node: It represents specific entities or objects in the real world, such as people, organizations, cities, locations, etc.
- Edge: It represents the relationship, directionality, and weight between two nodes.
Knowledge Graphs are like organized maps of information that help computers understand how different things are connected. They show relationships between people, places, and ideas. Using these graphs, computers can give more accurate answers and make sense of complex topics by looking at how things relate to each other. For example, if you ask a computer a question, it can use the Knowledge Graph to find the right information and give you a helpful answer. Overall, Knowledge Graphs help computers explain things in a way that makes sense to us.
Neo4j: An Overview
Neo4j is a graph database management system (GDBMS). The data elements Neo4j stores are nodes, the edges connecting them, and the attributes of nodes and edges.
To start Neo4j, visit the Neo4j aura console and log in. Then start a free instance from the console. After that, get the URL and password for further use.
Let’s Code
First, we set up the connection with Neo4j.
Load the dataset. You have the option to use your own dataset.
Here’s the link to the dataset I have used: https://huggingface.co/datasets/Nicolybgs/healthcare_data
The following function converts the dataset into a single string and converts it into a document format.
Now, load the text splitter.
We now initialize our LLM. We are using Llama 3.
Now, we are creating the nodes and edges of the graph with the help of the LLMGraphTransformer. Then, we are creating the knowledge graph and uploading it to Neo4j.
![](https://cdn.prod.website-files.com/6473d8d02a3cf26273f2787d/6682a92b3e68066dc7e70d25_AD_4nXcKELz1ZLBuyFocIV-eC5G2yNe-WDEEcJRjv93pqpqmxNeTzCTECACvyfT6YdvuImdhLXBsPvBr7LvJWX86FZMJfv8LEJYEqUvTX5jdBdbwdW4eMmHHqrJKlUmFSAhkxdZHZe1Q9DlAV7T7hXBwFbb4i5EM.png)
We are ready to load the embedding model. You can use any open-source embedding model.
Next, we will create a vector index to get information from the knowledge graph.
Let’s define the function to retrieve and respond.
Finally, we’ll utilize Gradio to construct our interface.
![](https://cdn.prod.website-files.com/6473d8d02a3cf26273f2787d/6682a92b30148f21482333ac_AD_4nXfuyr6tnWaGpciJE6j72VMKnMFrSYjRs0yWcUquLcSzeKt8iC6qIAXQ-UmpP7AunHjJhmekakCyhtxgx-CrVzZc0Ww-UpFVGOFh50GVPYp0WtPPCfYTVPxyLlz-g1wUuMTHhiXOGEfdmKu2VIoX0ReWnH8.png)
![](https://cdn.prod.website-files.com/6473d8d02a3cf26273f2787d/6682a92b588514cece647aac_AD_4nXfGtXJWuBub1XXyz-TgoIAKGlq4Fg_pzqZtytdU2qgi6vVI43GYtjTKUjYjeNUZbSKZiSykKgsy9kRqHtpI0iQOy76EhZBdeXcoTUauuFeLx4QDQpxujFubxHIEoAt9d9_nl5ftAlW74t_WDBhQ.png)
Conclusion
The integration of Graph Retrieval-Augmented Generation (Graph RAG) models in healthcare technology has significantly improved hospital-patient interactions. Healthcare chatbots powered by Graph RAG provide personalized, efficient services, enhancing patient care and optimizing hospital operations. This technology allows doctors and nurses to quickly access vital patient information, leading to faster and more informed decision-making, ultimately benefiting both patients and providers.
References
https://python.langchain.com/v0.2/docs/integrations/graphs/neo4j_cypher/