Jiazhen Pan

Being a second-derivative meta-learner.

Hey there, I am JZ Peter Pan, flying and rapping my verse in the field of AI in Medicine. I am a project-leading postdoctoral researcher at the Technical University of Munich and AI in Medicine Lab, working together with Daniel Rueckert and Benedikt Wiestler.

My research mission is to leverage our AI expertise to tackle foundational challenges in healthcare and ensure that as AI models (LLMs/VLMs) become increasingly powerful, they can be deployed safely, reliably, and ethically in high-stakes clinical environments. To this end, I lead a research thrust and supervise several Ph.D. students focused on the core challenge of AI trustworthiness. My work spans two key pillars:

1. Trustworthy Medical AI: I specialize in evaluating and enhancing the reasoning capabilities of large AI models. My approach involves developing novel adversarial attacks and rigorous audit frameworks ("red-teaming") to uncover and mitigate failure modes before they can cause harm.

2. Advanced Medical Imaging: My research is also deeply rooted in technical expertise in medical imaging. I apply representation learning and generative models to tackle complex problems such as accelerated MR reconstruction, 3D/4D volume reconstruction, image analysis, and diagnosis. This body of work provides the technical foundation for my current efforts to enhance medical image reliability.

What's New

Research Topics

I focus on the following four subfields of AI in Medicine, with some representative works highlighted below.

  • DAS Medical Red-Teaming
    Beyond Benchmarks: Dynamic, Automatic And Systematic Red-Teaming Agents For Trustworthy Medical Language Models
    Jiazhen Pan*, Bailiang Jian*, Paul Hager, Yundi Zhang, Che Liu, Friederike Jungmann, Hongwei Bran Li, Chenyu You, Junde Wu, Jiayuan Zhu, Fenglin Liu, Yuyuan Liu, Niklas Bubeck, Christian Wachinger, Zhenyu Gong, Cheng Ouyang, Georgios Kaissis, Benedikt Wiestler, Daniel Rueckert
    Preprint 2025
  • APP
    Ask Patients with Patience: Enabling LLMs for Human-Centric Medical Dialogue with Grounded Reasoning
    Jiayuan Zhu, Jiazhen Pan, Fenglin Liu, Yuyuan Liu, Junde Wu
    EMNLP 2025
  • Minimalist Rule-Based RL for Medical LLMs
    Beyond Distillation: Pushing the Limits of Medical LLM Reasoning with Minimalist Rule-Based RL
    Che Liu*, Haozhe Wang*, Jiazhen Pan*, Zhongwei Wan, Yong Dai, Fangzhen Lin, Wenjia Bai, Daniel Rueckert, Rossella Arcucci
    Preprint 2025
  • MedVLM-R1
    MedVLM-R1: Incentivizing Medical Reasoning Capability of Vision-Language Models (VLMs) via Reinforcement Learning
    Jiazhen Pan*, Che Liu*, Junde Wu, Fenglin Liu, Jiayuan Zhu, Hongwei Bran Li, Chen Chen, Cheng Ouyang, Daniel Rueckert
    MICCAI 2025 (Early Acceptance)
  • Cardiac Foundation Models
    Towards Cardiac MRI Foundation Models: Comprehensive Visual-Tabular Representations for Whole-Heart Assessment and Beyond
    Yundi Zhang, Paul Hager, Che Liu, Suprosanna Shit, Chen Chen, Daniel Rueckert, Jiazhen Pan
    Medical Image Analysis 2025
  • Cardiac Representation Learning
    Whole Heart 3D+T Representation Learning Through Sparse 2D Cardiac MR Images
    Yundi Zhang, Chen Chen, Suprosanna Shit, Sophie Starck, Daniel Rueckert, Jiazhen Pan
    MICCAI 2024 (Oral and Best Paper Finalist)
  • Latent Interpolation Learning
    Latent Interpolation Learning Using Diffusion Models for Cardiac Volume Reconstruction
    Niklas Bubeck, Suprosanna Shit, Chen Chen, Can Zhao, Pengfei Guo, Dong Yang, Georg Zitzlsberger, Daguang Xu, Bernhard Kainz, Daniel Rueckert, Jiazhen Pan
    Preprint 2025
  • Recon vs. Generation
    Reconstruct or Generate: Exploring the Spectrum of Generative Modeling for Cardiac MRI
    Niklas Bubeck, Yundi Zhang, Suprosanna Shit, Daniel Rueckert, Jiazhen Pan
    MICCAI 2025 (Deep Generative Models Oral)
  • TimeFlow
    TimeFlow: Longitudinal Brain Image Registration and Aging Progression Analysis
    Bailiang Jian, Jiazhen Pan, Yitong Li, Fabian Bongratz, Ruochen Li, Daniel Rueckert, Benedikt Wiestler, Christian Wachinger
    Preprint 2025
  • Unrolled Motion-compensated Reconstruction
    Unrolled and Rapid Motion-compensated Reconstruction for Cardiac CINE MRI
    Jiazhen Pan, Manal Hamdi, Wenqi Huang, Kerstin Hammernik, Thomas Kuestner, Daniel Rueckert
    Medical Image Analysis 2024
  • Reconstruction-driven Motion Estimation
    Reconstruction-driven Motion Estimation for Motion-compensated MR CINE
    Jiazhen Pan, Wenqi Huang, Daniel Rueckert, Thomas Kuestner, Kerstin Hammernik
    Transactions on Medical Imaging 2024
  • k-GIN
    Global k-Space Interpolation for Dynamic MRI Reconstruction Using Masked Image Modeling
    Jiazhen Pan, Suprosanna Shit, Özgün Turgut, Wenqi Huang, Hongwei Bran Li, Nil Stolt-Ansó, Thomas Küstner, Kerstin Hammernik & Daniel Rueckert
    MICCAI 2023 (Best Paper Finalist)
  • NIKS
    Neural Implicit k-Space for Binning-Free Non-Cartesian Cardiac MR Imaging
    Wenqi Huang, Hongwei Bran Li, Jiazhen Pan, Gastao Cruz, Daniel Rueckert, Kerstin Hammernik
    IPMI 2023

Team

I am fortunate to work with these talented researchers and students.

Yundi Zhang
Yundi Zhang
PhD Student
Multimodal Medical Imaging
2023 - Present
Niklas Bubeck
Niklas Bubeck
PhD Student
Generative Models in Medical Imaging
2024 - Present
Johannes Moll
Johannes Moll
PhD Student (Co-advised with Daniel Rueckert and Lisa Adams)
LLMs/VLMs Reasoning
2025 - Present
Chengzhi Shen
Chengzhi Shen
PhD Student
AI Safety and Red-Teaming
2025 - Present
Aleksandr Gorbunov
Aleksandr Gorbunov
Master Student
MR Imaging Agents
2025 - Present

Alumni

Alumni Member
Aleksandar Rončević
Former Master Student
Now: PhD Student at Vienna University of Technology
TUM Graduate 2025
Alumni Member
Haozhuang Chi
Former Master Student
Now: PhD at Nanyang Technological University
TUM Graduate 2023
Alumni Member
Manal Hamdi
Former Master Student
Now: Google Inc.
TUM Graduate 2023
Alumni Member
Jonas Brokmeier
Former Master Student
Now: Robotics Startup
TUM Graduate 2022

Teaching

Funders and Collaborators

ERC
NVIDIA
Oxford
Nagoya
MCML
ICL
Zurich
Harvard