Dr. Folkert is an academic radiation oncologist with expertise in brachytherapy/interventional techniques, device development, and image analysis. In 2005, he completed his Ph.D. in Nuclear Engineering and Radiological Sciences through the Harvard/MIT joint program, focusing on particle accelerator design and radiation biology research. He earned his M.D. through the Harvard Health Sciences and Technology Program in 2009 with research in intraoperative radiation therapy while working in the Department of Radiation Oncology at Massachusetts General Hospital as a research associate, where he also investigated interaction of respiratory motion on particle beam dose delivery. After an internal medicine internship at Mt. Auburn Hospital in Cambridge, MA, he completed the Radiation Oncology Residency Program at Memorial Sloan Kettering Cancer Center, with an emphasis on brachytherapy procedural training and imaging research with their Department of Medical Physics.

Dr. Folkert was recruited to UTSW's Department of Radiation Oncology to expand the brachytherapy program and develop an intraoperative radiation therapy program to support the surgical services at UTSW. In addition, he serves as the Program Director for the Medical Residency Program and the Associate Vice Chair of Education for the Department of Radiation Oncology. He treats radiation oncology patients with bone/soft tissue, gastrointestinal, and genitourinary cancers, and is the Chief of the Gastrointestinal Radiation Oncology Service. He aims to establish collaborative projects with clinicians and researchers.


Other Post Graduate Training
Massachusetts Institute of Technology (2005)
Graduate School
Massachusetts Institute of Technology (2005), Nuclear Engineering/radiological Sciences
Medical School
Harvard Medical School (2009)
Mount Auburn Hospital (2010), Internal Medicine
Clinical Research Fellowship
Cornell/Memorial Sloan Kettering Cancer Center (2013), Clinical Research
Memorial Sloan Kettering Cancer Center (2013), Radiation Oncology
Chief Resident
Memorial Sloan Kettering Cancer Center (2014), Radiation Oncology

Research Interest

  • Brachytherapy
  • Charged-particle therapy
  • Image analysis and outcomes modeling
  • Image-guided and navigational interventional technology
  • Interventions for toxicity reduction
  • Intraoperative radiation therapy
  • Liver cancer
  • Ocular tumors
  • Oligometastatic disease
  • Primary and metastatic lesions of the spine
  • Prostate cancer
  • Rectal cancer
  • Sarcoma
  • Stereotactic body radiation therapy


Featured Publications LegendFeatured Publications


Featured Books Legend Featured Books

Pancreatic adenocarcinoma. In Target Volume Delineation for Conformal and Intensity-Modulated Radiation Therapy

Romesser P.B., Folkert M.R., Goodman K.A. (2015). Switzerland, Springer International Publishing

Honors & Awards

  • 2016-2017 ARRO Educator of the Year Award
  • 2014 American Brachytherapy Society Resident Travel Grant Award
  • 2013 ASTRO Resident Clinical /Basic Science Research Award (Physics)
  • ASCO Pain and Symptom Management (Merit) Award
  • Best of ASTRO Presentation Recognition
  • New York Roentgen Society Best of ASTRO 2011 Award, CNS
  • MIT Karl Taylor Compton Prize

Professional Associations/Affiliations

  • American Radium Society (2016)
  • Connective Tissue Oncology Society (CTOS) (2014)
  • American Society of Clinical Oncology (ASCO) (2012)
  • American Brachytherapy Society (ABS) (2011)
  • Radiological Society of North America (RSNA) (2010)
  • American Society for Radiation Oncology (ASTRO) (2005)