from transformers import AutoTokenizer, AutoModelForCausalLM
import torch

model     = AutoModelForCausalLM.from_pretrained(
    "LewinRobin/Medgemma-1.5-ROCOv2", torch_dtype=torch.bfloat16, device_map="auto"
)
tokenizer = AutoTokenizer.from_pretrained("LewinRobin/Medgemma-1.5-ROCOv2")

messages = [
    {"role": "system", "content": "You are a highly experienced radiologist. Given a radiology image identifier and its associated UMLS medical concepts, write an accurate and concise radiology report caption."},
    {"role": "user",   "content": "Image ID: ROCOv2_2023_train_000001
Medical Concepts (UMLS CUIs): C0040405
Write the radiology report caption for this image."}
]
text   = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
inputs = tokenizer(text, return_tensors="pt", return_token_type_ids=True).to(model.device)
out    = model.generate(**inputs, max_new_tokens=128)
print(tokenizer.decode(out[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True))

Training

Base model : google/medgemma-4b-it
Dataset : StanfordAIMI/rocov2 (~60 k samples)
Method : QLoRA (merged) — 4-bit NF4, r=64, alpha=128
Hardware : NVIDIA H100 80 GB
Adapter source : LewinRobin/Medgemma-1.5-ROCOv2-args