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Model Details
Model Provider
Weidows
Model Tree
Saint-lsy/MedSAM-Agent-Qwen3-VL-8B-MedSAM2
Input Modalities
Output Modalities
Supported Functionality
MedSAM-Agent reformulates interactive medical image segmentation into a multi-step, autonomous, decision-making process. It drives a segmentation tool (SAM-family) using MLLM-generated tool calls (add_bbox, add_point, stop_action). This checkpoint is the trained Qwen3-VL-8B grounding model without the separate MedSAM2 segmentation checkpoint (that lives in the code repo as MedSAM2_latest.pt).
python
import torchfrom transformers import AutoModel, AutoProcessor, BitsAndBytesConfigmodel_id = "Weidows/MedSAM-Agent-Qwen3-VL-8B-MedSAM2-4bit"quant_config = BitsAndBytesConfig(load_in_4bit=True, bnb_4bit_compute_dtype=torch.bfloat16)model = AutoModel.from_pretrained(model_id, quantization_config=quant_config, device_map="auto")processor = AutoProcessor.from_pretrained(model_id)
If you use Unsloth, just pass
load_in_4bit=True/FastVisionModel.from_pretrained(model_id, load_in_4bit=True).
Follow the official inference flow from the MedSAM-Agent repo — pass this model folder as --model-path:
bash
cd inferpython run_single_inference.py \--img-path infer/demo/BTCV-0-106_CT_abdomen.png \--target-description "right kidney in abdomen CT" \--model-path /path/to/this/model \--seg-checkpoint /path/to/MedSAM2_latest.pt \--seg-model medsam
python
from unsloth import FastVisionModelmodel, tokenizer = FastVisionModel.from_pretrained("Saint-lsy/MedSAM-Agent-Qwen3-VL-8B-MedSAM2",max_seq_length=8192,load_in_4bit=True,device_map="auto",)model.save_pretrained("MedSAM-Agent-Qwen3-VL-8B-MedSAM2-4bit")tokenizer.save_pretrained("MedSAM-Agent-Qwen3-VL-8B-MedSAM2-4bit")
Please cite the original work:
bibtex
@misc{liu2026medsamagentempoweringinteractivemedical,title={MedSAM-Agent: Empowering Interactive Medical Image Segmentation with Multi-turn Agentic Reinforcement Learning},author={Shengyuan Liu and Liuxin Bao and Qi Yang and Wanting Geng and Boyun Zheng and Chenxin Li and Wenting Chen and Houwen Peng and Yixuan Yuan},year={2026},eprint={2602.03320},archivePrefix={arXiv},primaryClass={cs.CV},url={https://arxiv.org/abs/2602.03320},}