Guang-Pei Chen, PhD

Guang-Pei Chen, PhD Clinical Director of Medical Physics

Department of Radiation Oncology
8701 Watertown Plank Road
Milwaukee, WI 53226
(414) 805-9346


  • Doctor of Philosophy, Physics, Tsinghua University, Beijing, China (1994).
  • Bachelors of Science, Physics, Tsinghua University, Beijing, China (1988).


  • Postdoctoral Fellow, Medical Physics, Medical College of Wisconsin, Milwaukee, WI (2005-2006).


  • Therapeutic Radiology Physics, American Board of Radiology (2010).

Clinical Appointments

  • Staff Physicist: Department of Radiation Oncology, Froedtert Hospital, Milwaukee, WI, 2006 – present
  • Staff Physicist: Community Memorial Hospital, Menomonee Falls, WI, 2006 – 2008
  • Staff Physicist: Senator Joseph Andrea Cancer Center, St. Catherine’s Campus, United Healthcare Systems, Kenosha,WI, 2012 – present
  • Clinical Director: Department of Radiation Oncology, Medical College of Wisconsin, 2014 - present

Clinical Responsibilities

Froedtert Hospital:

  • QA and Clinical Services
  • Tomotherapy
  • Lantis/Mosaiq
  • Coherence

Representative Publications

  • A planning comparison of 7 irradiation options allowed in RTOG 1005 for early-stage breast cancer. Chen GP, Liu F, White J, Vicini FA, Freedman GM, Arthur DW, Li XA. Med Dosim. 2014 Aug 22. pii: S0958-3947(14)00083-1. doi: 10.1016/j.meddos.2014.06.007. [Epub ahead of print].PMID:25155215
  • A planning and delivery study of a rotational IMRT technique with burst delivery. Kainz K, Chen GP, Chang YW, Prah D, Sharon Qi X, Shukla HP, Stahl J, Allen Li X. Med Phys. 2011 Sep;38(9):5104-18. doi: 10.1118/1.3622612.PMID:21978056
  • An on-line replanning scheme for interfractional variations. Ahunbay EE, Peng C, Chen GP, Narayanan S, Yu C, Lawton C, Li XA. Med Phys. 2008 Aug;35(8):3607-15. PMID:18777921
  • Automated computer optimization for 3D treatment planning of breast irradiation. Chen GP, Ahunbay E, Li XA. Med Phys. 2008 Jun;35(6):2253-8.PMID:18649455
  • Development of an inverse optimization package to plan nonuniform dose distributions based on spatially inhomogeneous radiosensitivity extracted from biological images. Chen GP, Ahunbay E, Schultz C, Li XA. Med Phys. 2007 Apr;34(4):1198-205.PMID:17500451
  • Direct aperture optimization-based intensity-modulated radiotherapy for whole breast irradiation.
    Ahunbay EE, Chen GP, Thatcher S, Jursinic PA, White J, Albano K, Li XA. Int J Radiat Oncol Biol Phys. 2007 Mar 15;67(4):1248-58. Epub 2007 Feb 1. PMID:17275205

Medical College of Wisconsin
8701 Watertown Plank Road
Milwaukee, WI 53226
(414) 955-8296
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