SandLogicTechnologies/MedGemma-4B-IT-GGUF

Quantized MedGemma-4B-IT Models

This repository provides quantized GGUF versions of the google/medgemma-4b-it model. These 4-bit and 5-bit quantized variants retain the original model’s strengths in multimodal medical reasoning, while reducing memory and compute requirements—ideal for efficient inference on resource-constrained devices.

Model Overview

• Original Model: google/medgemma-4b-it
• Quantized Versions:
  • Q4_K_M (4-bit quantization)
  • Q5_K_M (5-bit quantization)
• Architecture: Decoder-only transformer with SigLIP vision encoder
• Base Model: google/gemma-3-4b-pt
• Modalities: Text + Image (Multimodal)
• Developer: Google
• License: Health AI Developer Foundations License
• Language: English (medical domain)

Quantization Details

Q4_K_M Version

• Approx. ~75% size reduction
• Lower memory footprint (~2.3 GB)
• Best suited for deployment on edge devices or low-resource GPUs
• Slight performance degradation in complex reasoning scenarios

Q5_K_M Version

• Approx. ~69% size reduction
• Higher fidelity (~2.6 GB)
• Better performance retention, recommended when quality is a priority

Key Features

• Expert-level medical image understanding and report generation
• Strong performance on radiology, dermatology, pathology, and ophthalmology benchmarks
• Multimodal instruction following and clinical question answering
• Pretrained with SigLIP vision encoder + medical text encoder

Usage

Below, there are some code snippets on how to get quickly started with running the model. llama.cpp (text-only)

./llama-cli -hf SandLogicTechnologies/MedGemma-4B-IT-GGUF -p "What are the symptoms of diabetes"

llama.cpp (image input)

./llama-gemma3-cli -hf SandLogicTechnologies/MedGemma-4B-IT-GGUF -p "Describe this image." --image ~/Downloads/xray_image.png

Model Data

Dataset Overview

The original MedGemma-4B-IT model is built on top of the Gemma architecture and trained with a strong focus on medical multimodal data:

• Image Encoder: A SigLIP-based vision model pre-trained on de-identified medical images, including:

  • Chest X-rays
  • Dermatology images
  • Ophthalmology fundus photos
  • Histopathology slides

• LLM Component: Trained on diverse medical text datasets related to the above imaging domains, including clinical reports, QA datasets, and biomedical literature.

This combination enables MedGemma to perform visual-text reasoning and clinical instruction following in healthcare applications.

Recommended Use Cases

These quantized models are optimized for efficient inference while preserving core MedGemma capabilities. Suggested use cases include:

• Medical visual question answering (VQA)
  Analyze and interpret chest X-rays, skin lesions, fundus images, etc.

• Chatbot and assistant prototypes
  Build interactive healthcare chat systems with vision-language capabilities.

• Research & fine-tuning
  Serve as a lightweight base for further task-specific tuning in healthcare AI.

• Low-resource deployment
  Run multimodal reasoning models on CPUs, edge devices, and lightweight GPUs.

• Rapid prototyping
  Ideal for experimentation, prototyping, and integration in clinical R&D.

⚠️ Note: These models are not intended for direct clinical use without appropriate validation.

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Acknowledgments

These quantized models are based on the original work by Google and the MedGemma development team.

Special thanks to:

• The Google DeepMind team for developing and releasing the MedGemma-4B-IT model.
• Georgi Gerganov and the entire llama.cpp open-source community for enabling efficient model quantization and inference via the GGUF format.

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Contact

For any inquiries or support, please contact us at support@sandlogic.com or visit our Website.