Committee Member, Providence Cancer Society

Member, School Advisory Committee

Coaching, Soccer and Basketball teams

Article Reviewer, Scientific Journals

Editor of the Handbook of Evidence-Based Radiation Oncology, a medical reference used by radiation oncologists worldwide 

Member, International Stereotactic Radiosurgery Society (ISRS), 2018-2020 

Member, American Radium Society (ARS), 2009-2016 

Member, Oregon Medical Association (OMA), 2007-2014 

Member, American Brachytherapy Society (ABS), 2004-2008 

Member, American Society for Clinical Oncology (ASCO), 2003-2014 

Member, Radiological Society of North America (RSNA), 2003-2007 

Member, American College of Radiology (ACR), 2003-2007 

Member, American Society for Therapeutic Radiology and Oncology (ASTRO), 2003-Present 

Residency, Radiation Oncology, University of California, San Francisco, 2007

Internship, Internal Medicine, St. Mary’s Medical Center, 2003

MD, Oregon Health & Science University, 2002

BA, Yale University, 1998

Radiation Oncology

Chair, Radiation Safety Committee, Providence St. Vincent Medical Center, 2026-Present

Radiation Oncology Medical Director at Providence St. Vincent Hospital, 2023-2026 

President, Oregon Radiation Oncology Society, 2012-2013 

Vice President, Oregon Radiation Oncology Society, 2010-2011 

Invited panelist, Radiation Oncology Institute Delphi Panel to identify national radiation oncology research priorities, 2010 

Editor-at-large, Cogent Medicine nationwide journal club for Radiation Oncologists, 2005 

Portland Monthly Magazine Top Doctor, Radiation Oncology, 2012, 2015, 2016, 2017, 2018, 2019, 2025, 2026 

RSNA Roentgen Resident/Fellow Research Award, UCSF, 2007 

Phi Beta Kappa Academic Honor Society, Yale University, 1998 

United States Presidential Scholar selected by President Clinton, 1994 

Poppe M, Le-Rademacher J, Haffty B, Hansen E, et al. A Randomized Trial of Hypofractionated Post Mastectomy Radiation Therapy (PMRT) in Women with Breast Reconstruction (RT CHARM, Alliance A221505). Submitted to Journal of Clinical Oncology 2026. 

Yamazaki T, Gunderson AJ, Gilchrist M, et al. Galunisertib plus neoadjuvant chemoradiotherapy in patients with locally advanced rectal cancer: a single-arm, phase 2 trial. Lancet Oncology 2022; 23(9): 1189-1200. 

Jones C, Hansen EK, Mozena J. Radiation therapy for plantar fibromas (Ledderhose Disease). J Am Podiatr Med Assoc 2022; 112(1): 1-3. 

Hansen EK. Sparing discomfort for the patient or the physician? In regard to Rana et al. Int J Radiat Oncol Biol Phys 2018; 100(5): 1297. 

Luick ML, Hansen EK, Greenberg MS, Kim R, Owens M, Moore CJ, Flores M. Primary tracheal non-Hodgkin’s lymphoma. J Clin Oncol 2011; 29(8): 193-5. 

Seung S, Bae J, Solhjem M, Bader S, Gannett D, Hansen EK, Louie J, Underhill K, Cha C. IMRT for head and neck cancer in the community setting. Int J Radiat Oncol Biol Phys 2008; 15;72(4):1075-81 

Ezzell LC, Hansen EK, Quivey JM, and Xia P. Detection of treatment setup errors between two CT scans for patients with head and neck cancer. Med Phys 2007; 34: 3233-3242 

Patel S, Jagsi R, Wilson J, Frank S, Thakker V, and Hansen EK. Results of the 2004 Association of Residents in Radiation Oncology (ARRO) Survey. Int J Radiat Oncol Biol Phys 2006; 66: 1199-1203 

Hansen EK, Larson DA, Aubin M, Chen J, Descovich M, Gillis AM, Morin O, Xia P, Pouliot J. Image guided radiotherapy using megavoltage cone-beam CT for treatment of paraspinous tumors in the presence of orthopedic hardware. Int J Radiat Oncol Biol Phys 2006; 66: 323-326 

Hansen EK, Bucci MK, Quivey JM, Weinberg V, Xia P. Repeat CT imaging and re-planning during the course of IMRT for head and neck cancer. Int J Radiat Oncol Biol Phys 2006; 64: 355-362 

Hansen EK, Krieg RM, Azar RJ, Jablons DM, Jahan TM, Zaloudek CJ. Carcinoid tumor of the thymus. J Clin Oncol 2005; 23: 2859-2861 

Skoner J, Andersen P, Cohen J, Holland J, Hansen E, Wax M. Swallowing function and tracheotomy dependence after combined modality treatment including free tissue transfer for advanced stage oropharyngeal cancer. Laryngoscope 2003; 113: 1294-1298 

Hansen E, Donohoe M. Health issues of migrant and seasonal farmworkers. J Health Care Poor Underserved 2003; 14: 153-164 

Hansen E, Panwala K, Holland J. Postoperative radiation therapy for advanced-stage oropharynx cancer. J Laryngol Otol 2002; 116: 920-924 

Wharton C, Grafman J, Flitman S, Hansen E, Brauner J, Marks R, Honda M. Towards neuroanatomical models of analogy: A positron emission tomography study of analogical mapping. Cognit Psychol 2000; 40: 173-197 

Chandra RA, Ord CB, Rana S, Hansen EK, Thomas CR (Editors). Radiation Oncology Study Guide Second Edition. New York, NY: Springer; 2020. 

Hansen EK, Roach MR (Editors). Handbook of Evidence-Based Radiation Oncology, 3rd Edition. New York, NY: Springer; 2018. Wrote Prostate Cancer chapter 

Bicquart C, Hansen EK, Thomas CR (Editors). Radiation Oncology Study Guide. New York, NY: Springer; 2013. 

Hansen EK, Roach MR (Editors). Handbook of Evidence-Based Radiation Oncology, 2nd Edition. New York, NY: Springer; 2010. Translated into Russian (GEOTAR-Media Publishing Group, 2013) and Chinese (People’s Military Medical Press, 2015). Wrote chapters on Prostate cancer, Non-small cell lung cancer, Cancer of the larynx & hypopharynx, Nasopharyngeal cancer, Cancer of the lip & oral cavity, Cancer of the ear, Unusual neoplasms of the head & neck, Vaginal cancer, and Urethral cancer. 

Kollmansberger C, Daneshmand S, Hansen EK, et al. Testis Cancer. In: Cancer Medicine, 8th Edition. Shelton, CT: People’s Medical Publishing House; 2010. 

Patel S, Hansen E, Wallner P. Transition from residency to your first job. In: American College of Radiation Oncology Practice Management Guide 2008. 

Hansen EK, Roach MR (Editors). Handbook of Evidence-Based Radiation Oncology. New York, NY: Springer; 2007. Translated into Japanese (Japan Uni Agency, Chugai Igaku Shahas, 2007) and Turkish (Guven Bilimsel, 2008). Wrote chapters on Prostate Cancer, Non-small cell lung cancer, Larynx & Hypopharynx cancer, Nasopharynx Cancer, Cancer of the Lip and Oral Cavity, Cancer of the Ear, Unusual neoplasms of the head & neck, Vaginal cancer, and Pediatric (Non-CNS) tumors. 

Wharton C, Grafman J, Flitman S, Hansen E, Brauner J, Marks A, & Honda M. The neuroanatomy of analogical reasoning. In: Holyoak K, Gentner D, Kokinov B, eds. Advances in analogy research: Integration of theory and data from the cognitive, computational, and neural sciences. Sophia, Bulgaria: New Bulgarian University; 1998: 260-269