Lab Members

Principal Investigator

Tiezhi Zhang, PhD

Associate Professor, Department of Radiation Oncology

  • Ph.D., Medical Physics: University of Wisconsin-Madison, Madison, WI (2004)


Tiezhi Zhang, PhD, is an associate professor of radiation oncology at the Radiation Oncology department. Dr. Zhang earned a PhD in Medical Physics from University of Wisconsin 2004. He joined the Washington University faculty in 2014. He is certified in Therapeutic Radiological Physics by the American Board of Radiology.


Dr. Zhang is developing novel X-ray imaging technologies for image-guided radiotherapy. His lab is developing high brightness multi-pixel thermionic emission X-ray (MPTEX) sources, as well as a novel Tetrahedral beam CT (TBCT) using the MPTEX source. TBCT is a compact volumetric CT system that is immune to the problems of current cone beam CT system by using a new scanning geometry. It can produce high-quality CT images for image-guided radiotherapy and intervention.


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Lab Members

Post-Doctoral Researchers

Jonathan Haefner, Ph.D.

Ph.D. Physics, Harvard University, (2022)
B.S. Physics, The University of Michigan, Ann Arbor, (2016)

Research Topics

Proton treatment plan optimization, TBCT imaging, multi-pixel x-ray source imaging, small animal FLASH-RT irridator (SAFI).

Graduate Students

Shuang Zhou, B.S.
Ph.D. in Imaging Science Candidate
B.S. Electrical Engineering, Lanzhou University

Research Interest
Image reconstruction, machine-learning, proton radiography, proton QA device.

Past Lab members

Post-Doctoral Researchers

Qinghao Chen, Ph.D.
Ph.D. Nuclear Science and Technology, Tsinghua University,  China
B.S. Engineering Physics, Tsinghua University, China
Research Interest: TBCT imaging, IMPT optimization algorithm, Monte Carlo Simulation.
Current position: Medical Physics Resident, Washington University in St. Louis

Praneeth Kandlakunta, PhD

  • Ph.D., Nuclear Engineering, Ohio Sate University (2014)
    M.S., Nuclear Engineering (2012)
    BE, Electronics and Instrumentation Engineering (2008)

Research Interests: Developing MPTEX source, TBCT and Linac Monte Carlo Simulation
Current Position: Senior engineer, Ohio State University.

Xiaochao Xu, Post-doctoral researcher (CT detector Scientist, Toshiba Medical Research Institute, Chicago, IL)

Graduate Students

Yuewen Tan, Ph.D. Student, 2022 (Postdoc, Columbia University)

Joshua Kim, Ph.D. Student, Oakland University, 2013, (Senior Physicist, Henry Ford Health System, Detroit, MI)

Undergraduate Students

Joshua Olick-Gibson, B.S. Biomedical Engineering, Washington University, (Ph.D. Candidate, Caltech).