Jeffrey Olsen, MD

Professor, Radiation Oncology


FacultyPhoto
Medical School
  • MD, Washington University in St. Louis School of Medicine (2007)
Undergraduate School
  • BS, University of Illinois–Urbana-Champaign (IL) (2003)
Internship
  • MacNeal Hospital Program (2008)
Residency
  • Washington University in St. Louis, Radiation Oncology (2012)
Department
Radiation Oncology

Professional Titles

  • Southern Colorado Division Head

Recognitions

  • Top Doctor, Colorado Springs Magazine, 2021, El Paso County Medical Society (2021)
  • Physician of the Year Award, Memorial Hospital Oncology Service Line (2020)
  • Top Doctor, Colorado Springs Magazine, 2022, El Paso County Medical Society (2022)

Research Interests

My research interests include trial development for novel approaches towards treatment of gastrointestinal malignancies, in addition to application of modern radiotherapy techniques including stereotactic body radiotherapy and radiosurgery. I have published over 50 peer reviewed publications in these areas with interests across cancer subtypes.

Publications

  • Weiner AA, Olsen J, Ma D, Dyk P, DeWees T, Myerson RJ, Parikh P. Stereotactic body radiotherapy for primary hepatic malignancies - Report of a phase I/II institutional study. Radiother Oncol. 2016 Oct;121(1):79-85. PubMed PMID: 27566894
  • Henke L, Kashani R, Yang D, Zhao T, Green O, Olsen L, Rodriguez V, Wooten HO, Li HH, Hu Y, Bradley J, Robinson C, Parikh P, Michalski J, Mutic S, Olsen JR. Simulated Online Adaptive Magnetic Resonance-Guided Stereotactic Body Radiation Therapy for the Treatment of Oligometastatic Disease of the Abdomen and Central Thorax: Characterization of Potential Advantages. Int J Radiat Oncol Biol Phys. 2016 Dec 1;96(5):1078-1086. PubMed PMID: 27742541
  • Roy A, Mahasittiwat P, Weiner AA, Hunt SR, Mutch MG, Birnbaum EH, Kodner IJ, Read TE, Fleshman JW, Olsen JR, Myerson RJ, Parikh PJ. Preoperative short-course radiation therapy for rectal cancer provides excellent disease control and toxicity: Results from a single US institution. Pract Radiat Oncol. 2017 Jan - Feb;7(1):e51-e58. PubMed PMID: 27720702
  • Mittauer K, Rosenberg S, Geurts M, Bassetti M, Chen I, Henke L, Olsen J, Kashani R, Wojcieszynski A, Harari P, Labby Z, Hill P, Paliwal B, Parikh P, Bayouth J. TU-AB-BRA-11: Indications for Online Adaptive Radiotherapy Based On Dosimetric Consequences of Interfractional Pancreas-To-Duodenum Motion in MRI-Guided Pancreatic Radiotherapy. Med Phys. 2016 Jun;43(6):3735-3736. PubMed PMID: 28047289
  • Henke L, Kashani R, Robinson C, Curcuru A, DeWees T, Bradley J, Green O, Michalski J, Mutic S, Parikh P, Olsen J. Phase I trial of stereotactic MR-guided online adaptive radiation therapy (SMART) for the treatment of oligometastatic or unresectable primary malignancies of the abdomen. Radiother Oncol. 2017 Dec 22. [Epub ahead of print] PubMed PMID: 29277446
  • Apisarnthanarax S, Jabbour SK, Liauw SL, Murphy JD, Olsen JR, Chang DT. Gastrointestinal Cancers: Timing Is Everything. Int J Radiat Oncol Biol Phys. 2017 Dec 1;99(5):1051-1058. PubMed PMID: 29165271
  • Cai B, Altman MB, Garcia-Ramirez J, LaBrash J, Goddu SM, Mutic S, Parikh PJ, Olsen JR, Saad N, Zoberi JE. Process improvement for the safe delivery of multidisciplinary-executed treatments-A case in Y-90 microspheres therapy. Brachytherapy. 2017 Jan - Feb;16(1):236-244. PubMed PMID: 27618420
  • Fischer-Valuck BW, Henke L, Green O, Kashani R, Acharya S, Bradley JD, Robinson CG, Thomas M, Zoberi I, Thorstad W, Gay H, Huang J, Roach M, Rodriguez V, Santanam L, Li H, Li H, Contreras J, Mazur T, Hallahan D, Olsen JR, Parikh P, Mutic S, Michalski J. Two-and-a-half-year clinical experience with the world's first magnetic resonance image guided radiation therapy system. Adv Radiat Oncol. 2017 Jul-Sep;2(3):485-493. PubMed PMID: 29114617
  • Cardenas ML, Spencer CR, Markovina S, DeWees TA, Mazur TR, Weiner AA, Parikh PJ, Olsen JR. Quantitative FDG-PET/CT predicts local recurrence and survival for squamous cell carcinoma of the anus. Adv Radiat Oncol. 2017 Jul-Sep;2(3):281-287. PubMed PMID: 29114593
  • Khwaja SS, Roy A, Markovina S, Dewees TA, Hunt S, Tan B, Myerson RJ, Olsen JR, Parikh PJ. Quality of Life Outcomes From a Phase 2 Trial of Short-Course Radiation Therapy Followed by FOLFOX Chemotherapy as Preoperative Treatment for Rectal Cancer. Int J Radiat Oncol Biol Phys. 2016 Aug 1;95(5):1429-38. PubMed PMID: 27209506
  • Feng Y, Kawrakow I, Olsen J, Parikh PJ, Noel C, Wooten O, Du D, Mutic S, Hu Y. A comparative study of automatic image segmentation algorithms for target tracking in MR-IGRT. J Appl Clin Med Phys. 2016 Mar 8;17(2):5820. PubMed PMID: 27074465
  • Markovina S, Youssef F, Roy A, Aggarwal S, Khwaja S, DeWees T, Tan B, Hunt S, Myerson RJ, Chang DT, Parikh PJ, Olsen JR. Improved Metastasis- and Disease-Free Survival With Preoperative Sequential Short-Course Radiation Therapy and FOLFOX Chemotherapy for Rectal Cancer Compared With Neoadjuvant Long-Course Chemoradiotherapy: Results of a Matched Pair Analysis. Int J Radiat Oncol Biol Phys. 2017 Oct 1;99(2):417-426. PubMed PMID: 28871992
  • Olsen JR, Moughan J, Myerson R, Abitbol A, Doncals DE, Johnson D, Schefter TE, Chen Y, Fisher B, Michalski J, Narayan S, Chang A, Crane CH, Kachnic L. Predictors of Radiation Therapy-Related Gastrointestinal Toxicity From Anal Cancer Dose-Painted Intensity Modulated Radiation Therapy: Secondary Analysis of NRG Oncology RTOG 0529. Int J Radiat Oncol Biol Phys. 2017 Jun 1;98(2):400-408. PubMed PMID: 28463160
  • Fowler KJ, Maughan NM, Laforest R, Saad NE, Sharma A, Olsen J, Speirs CK, Parikh PJ. PET/MRI of Hepatic 90Y Microsphere Deposition Determines Individual Tumor Response. Cardiovasc Intervent Radiol. 2016 Jun;39(6):855-64. PubMed PMID: 26721589
  • Acharya S, Fischer-Valuck BW, Kashani R, Parikh P, Yang D, Zhao T, Green O, Wooten O, Li HH, Hu Y, Rodriguez V, Olsen L, Robinson C, Michalski J, Mutic S, Olsen J. Online Magnetic Resonance Image Guided Adaptive Radiation Therapy: First Clinical Applications. Int J Radiat Oncol Biol Phys. 2016 Feb 1;94(2):394-403. PubMed PMID: 26678659
  • Badiyan SN, Olsen JR, Lee AY, Yano M, Menias CO, Khwaja S, Wang-Gillam A, Strasberg SM, Hawkins WG, Linehan DC, Myerson RJ, Parikh PJ. Induction Chemotherapy Followed by Concurrent Full-dose Gemcitabine and Intensity-modulated Radiation Therapy for Borderline Resectable and Locally Advanced Pancreatic Adenocarcinoma. Am J Clin Oncol. 2016 Feb;39(1):1-7. PubMed PMID: 26132367
  • Gui B, Weiner AA, Nosher J, Lu SE, Foltz GM, Hasan O, Kim SK, Gendel V, Mani NB, Carpizo DR, Saad NE, Kennedy TJ, Zuckerman DA, Olsen JR, Parikh PJ, Jabbour SK. Assessment of the Albumin-Bilirubin (ALBI) Grade as a Prognostic Indicator for Hepatocellular Carcinoma Patients Treated With Radioembolization. Am J Clin Oncol. 2017 Apr 17. [Epub ahead of print] PubMed PMID: 28418940
  • Cai B, Altman MB, Garcia-Ramirez J, LaBrash J, Goddu SM, Mutic S, Parikh PJ, Olsen JR, Saad N, Zoberi JE. Process improvement for the safe delivery of multidisciplinary-executed treatments-A case in Y-90 microspheres therapy. Brachytherapy. 2017 Jan - Feb;16(1):236-244. PubMed PMID: 27618420
  • Roy A, Mahasittiwat P, Weiner AA, Hunt SR, Mutch MG, Birnbaum EH, Kodner IJ, Read TE, Fleshman JW, Olsen JR, Myerson RJ, Parikh PJ. Preoperative short-course radiation therapy for rectal cancer provides excellent disease control and toxicity: Results from a single US institution. Pract Radiat Oncol. 2017 Jan - Feb;7(1):e51-e58. PubMed PMID: 27720702
  • Henke LE, Olsen JR, Contreras JA, Curcuru A, DeWees TA, Green OL, Michalski J, Mutic S, Roach MC, Bradley JD, Parikh PJ, Kashani R, Robinson CG. Stereotactic MR-Guided Online Adaptive Radiation Therapy (SMART) for Ultracentral Thorax Malignancies: Results of a Phase 1 Trial. Adv Radiat Oncol. 2019 Jan-Mar;4(1):201-209. PubMed PMID: 30706029
  • Rosenberg SA, Henke LE, Shaverdian N, Mittauer K, Wojcieszynski AP, Hullett CR, Kamrava M, Lamb J, Cao M, Green OL, Kashani R, Paliwal B, Bayouth J, Harari PM, Olsen JR, Lee P, Parikh PJ, Bassetti M. A Multi-Institutional Experience of MR-Guided Liver Stereotactic Body Radiation Therapy. Adv Radiat Oncol. 2019 Jan-Mar;4(1):142-149. PubMed PMID: 30706022
  • Olsen JR, Apisarnthanarax S, Murphy JD, Tait D, Huguet F, Hallemeier CL, Jabbour SK. Gastrointestinal Cancers: Fine-Tuning the Management of Rectal, Esophageal, and Pancreas Cancers. Int J Radiat Oncol Biol Phys. 2019 Sep 1;105(1):1-10. PubMed PMID: 31422802
  • Hallemeier CL, Olsen JR, Murphy JD, Tait D, Apisarnthanarax S, Huguet F, Jabbour SK. Gastrointestinal Cancers: Management of Rectal, Hepatocellular, Pancreatic, and Esophageal Cancers. Int J Radiat Oncol Biol Phys. 2019 May 1;104(1):1-9. PubMed PMID: 30967220
  • Henke LE, Contreras JA, Green OL, Cai B, Kim H, Roach MC, Olsen JR, Fischer-Valuck B, Mullen DF, Kashani R, Thomas MA, Huang J, Zoberi I, Yang D, Rodriguez V, Bradley JD, Robinson CG, Parikh P, Mutic S, Michalski J. Magnetic Resonance Image-Guided Radiotherapy (MRIgRT): A 4.5-Year Clinical Experience. Clin Oncol (R Coll Radiol). 2018 Nov;30(11):720-727. PubMed PMID: 30197095
  • Olsen JR, Murphy JD, Huguet F, Hallemeier CL, Apisarnthanarax S, Jabbour SK. Gastrointestinal Cancers-Carving Out the Optimal Local Therapies in the Gastrointestinal Tract. Int J Radiat Oncol Biol Phys. 2018 Oct 1;102(2):233-242. PubMed PMID: 30191854
  • Rudra S, Jiang N, Rosenberg SA, Olsen JR, Roach MC, Wan L, Portelance L, Mellon EA, Bruynzeel A, Lagerwaard F, Bassetti MF, Parikh PJ, Lee PP. Using adaptive magnetic resonance image-guided radiation therapy for treatment of inoperable pancreatic cancer. Cancer Med. 2019 May;8(5):2123-2132. PubMed PMID: 30932367
  • Jabbour SK, Apisarnthanarax S, Hallemeier CL, Huguet F, Murphy JD, Olsen JR. GI Cancers-Modulating the Modern Management of Gastrointestinal Malignancies: A Look at Liver Metastases, Rectal Cancer, Esophagogastric Cancer, and Anal Cancer. Int J Radiat Oncol Biol Phys. 2018 Jul 15;101(4):749-758. PubMed PMID: 29976479
  • Olsen JR, Murphy JD, Hallemeier CL, Apisarnthanarax S, Huguet F, Jabbour SK. Cross-Modality Comparisons Between Radiofrequency Ablation and Stereotactic Body Radiotherapy for Treatment of Hepatocellular Carcinoma: Limitations of the National Cancer Database. J Clin Oncol. 2018 Aug 20;36(24):2564-2565. PubMed PMID: 29945521
  • Ladbury C, A Goodman K, Schefter TE, Olsen JR. Anal Cancer in the Era of Dose Painted Intensity Modulated Radiation Therapy: Implications for Regional Nodal Therapy. Semin Radiat Oncol. 2019 Apr;29(2):137-143. PubMed PMID: 30827451
  • Henke LE, Olsen JR, Contreras JA, Curcuru A, DeWees TA, Green OL, Michalski J, Mutic S, Roach MC, Bradley JD, Parikh PJ, Kashani R, Robinson CG. Stereotactic MR-Guided Online Adaptive Radiation Therapy (SMART) for Ultracentral Thorax Malignancies: Results of a Phase 1 Trial. Adv Radiat Oncol. 2019 Jan-Mar;4(1):201-209. PubMed PMID: 30706029
  • Rosenberg SA, Henke LE, Shaverdian N, Mittauer K, Wojcieszynski AP, Hullett CR, Kamrava M, Lamb J, Cao M, Green OL, Kashani R, Paliwal B, Bayouth J, Harari PM, Olsen JR, Lee P, Parikh PJ, Bassetti M. A Multi-Institutional Experience of MR-Guided Liver Stereotactic Body Radiation Therapy. Adv Radiat Oncol. 2019 Jan-Mar;4(1):142-149. PubMed PMID: 30706022
  • Kashani R, Olsen JR. Magnetic Resonance Imaging for Target Delineation and Daily Treatment Modification. Semin Radiat Oncol. 2018 Jun;28(3):178-184. PubMed PMID: 29933877
  • Green OL, Rankine LJ, Cai B, Curcuru A, Kashani R, Rodriguez V, Li HH, Parikh PJ, Robinson CG, Olsen JR, Mutic S, Goddu SM, Santanam L. First clinical implementation of real-time, real anatomy tracking and radiation beam control. Med Phys. 2018 May 28. [Epub ahead of print] PubMed PMID: 29807390
  • Hallemeier CL, Huguet F, Tait D, Buckstein MH, Anker CJ, Kharofa J, Olsen JR, Jabbour SK. Randomized Trials for Esophageal, Liver, Pancreas, and Rectal Cancers. Int J Radiat Oncol Biol Phys. 2021 Feb 1;109(2):305-311. PubMed PMID: 33422270
  • Robin TP, Olsen JR. SABR for metastasis-directed therapy - what we've learned and what's to come. Nat Rev Clin Oncol. 2020 Oct;17(10):593-594. PubMed PMID: 32699308
  • Avant A, Olsen JR. Optimizing Rectal Cancer Neoadjuvant Therapy-How to Manage a cCR?. Int J Radiat Oncol Biol Phys. 2020 Mar 15;106(4):669-670. PubMed PMID: 32092337
  • Weiner AA, Gui B, Newman NB, Nosher JL, Yousseff F, Lu SE, Foltz GM, Carpizo D, Lowenthal J, Zuckerman DA, Benson B, Olsen JR, Jabbour SK, Parikh PJ. Predictors of Survival after Yttrium-90 Radioembolization for Colorectal Cancer Liver Metastases. J Vasc Interv Radiol. 2018 Aug;29(8):1094-1100. PubMed PMID: 29754852
  • Kharofa J, Hallemeier CL, Huguet F, Anker CJ, Buckstein MH, Tait D, Olsen JR, Jabbour SK. Gastrointestinal Cancers: Moving the Needle for Rectal, Gastroesophageal, Pancreaticobiliary, and Liver Cancers. Int J Radiat Oncol Biol Phys. 2020 Mar 15;106(4):653-662. PubMed PMID: 32092335
  • Henke L, Kashani R, Robinson C, Curcuru A, DeWees T, Bradley J, Green O, Michalski J, Mutic S, Parikh P, Olsen J. Phase I trial of stereotactic MR-guided online adaptive radiation therapy (SMART) for the treatment of oligometastatic or unresectable primary malignancies of the abdomen. Radiother Oncol. 2018 Mar;126(3):519-526. PubMed PMID: 29277446
  • Anker CJ, Buckstein MH, Chuong MD, Hawkins MA, Kharofa J, Raldow AC, Tait D, Olsen JR. The Evolving Personalized Landscape of Colorectal Cancer Therapies. Int J Radiat Oncol Biol Phys. 2021 Aug 1;110(5):1255-1262. PubMed PMID: 34273318
  • Kim H, Pedersen K, Olsen JR, Mutch MG, Chin RI, Glasgow SC, Wise PE, Silviera ML, Tan BR, Wang-Gillam A, Lim KH, Suresh R, Amin M, Huang Y, Henke LE, Park H, Ciorba MA, Badiyan S, Parikh PJ, Roach MC, Hunt SR. Nonoperative Rectal Cancer Management With Short-Course Radiation Followed by Chemotherapy: A Nonrandomized Control Trial. Clin Colorectal Cancer. 2021 Sep;20(3):e185-e193. PubMed PMID: 34001462
  • Glide-Hurst CK, Lee P, Yock AD, Olsen JR, Cao M, Siddiqui F, Parker W, Doemer A, Rong Y, Kishan AU, Benedict SH, Li XA, Erickson BA, Sohn JW, Xiao Y, Wuthrick E. Adaptive Radiation Therapy (ART) Strategies and Technical Considerations: A State of the ART Review From NRG Oncology. Int J Radiat Oncol Biol Phys. 2021 Mar 15;109(4):1054-1075. PubMed PMID: 33470210
  • Hallemeier CL, Huguet F, Tait D, Buckstein MH, Anker CJ, Kharofa J, Olsen JR, Jabbour SK. Randomized Trials for Esophageal, Liver, Pancreas, and Rectal Cancers. Int J Radiat Oncol Biol Phys. 2021 Feb 1;109(2):305-311. PubMed PMID: 33422270
  • Gui B, Weiner AA, Nosher J, Lu SE, Foltz GM, Hasan O, Kim SK, Gendel V, Mani NB, Carpizo DR, Saad NE, Kennedy TJ, Zuckerman DA, Olsen JR, Parikh PJ, Jabbour SK. Assessment of the Albumin-Bilirubin (ALBI) Grade as a Prognostic Indicator for Hepatocellular Carcinoma Patients Treated With Radioembolization. Am J Clin Oncol. 2018 Sep;41(9):861-866. PubMed PMID: 28418940
  • Kim H, Olsen JR, Green OL, Chin RI, Hawkins WG, Fields RC, Hammill C, Doyle MB, Chapman W, Suresh R, Tan B, Pedersen K, Jansen B, DeWees TA, Lu E, Henke LE, Badiyan S, Parikh PJ, Roach MC, Wang-Gillam A, Lim KH. MR-Guided Radiation Therapy With Concurrent Gemcitabine/Nab-Paclitaxel Chemotherapy in Inoperable Pancreatic Cancer: A TITE-CRM Phase I Trial. Int J Radiat Oncol Biol Phys. 2023 Jan 1;115(1):214-223. PubMed PMID: 35878713
  • Buckstein MH, Anker CJ, Chuong MD, Hawkins MA, Kharofa J, Olsen JR. CROSSing into New Therapies for Esophageal Cancer. Int J Radiat Oncol Biol Phys. 2022 May 1;113(1):5-10. PubMed PMID: 35427559
  • Wojcieszynski AP, Chuong MD, Hawkins M, Jethwa KR, Kim H, Raldow A, Sanford NN, Olsen JR. Rectal Cancer Update: Which Treatment Effects Are the Least "Brutal"?. Int J Radiat Oncol Biol Phys. 2024 Jan 1;118(1):1-7. PubMed PMID: 38049215
  • Jethwa KR, Harmsen WS, Hawkins MA, Kim H, Sanford NN, Wojcieszynski AP, Olsen JR. Short-Course Radiation Therapy and the RAPIDO Trial: Too Short, Too Soon?. Int J Radiat Oncol Biol Phys. 2023 Nov 1;117(3):568-570. PubMed PMID: 37739607
  • Chin RI, Schiff JP, Bommireddy A, Kang KH, Andruska N, Price AT, Green OL, Huang Y, Korenblat K, Parikh PJ, Olsen J, Samson PP, Henke LE, Kim H, Badiyan SN. Clinical outcomes of patients with unresectable primary liver cancer treated with MR-guided stereotactic body radiation Therapy: A Six-Year experience. Clin Transl Radiat Oncol. 2023 Jul;41:100627. PubMed PMID: 37441543
  • Moyer AM, Vogel JD, Lai SH, Kim H, Chin RI, Moskalenko M, Olsen JR, Birnbaum EH, Silviera ML, Mutch MG, Chapman BC. Total Neoadjuvant Therapy in Rectal Cancer: Multi-center Comparison of Induction Chemotherapy and Long-Course Chemoradiation Versus Short-Course Radiation and Consolidative Chemotherapy. J Gastrointest Surg. 2023 May;27(5):980-989. PubMed PMID: 36759387
  • Chuong MD, Anker CJ, Buckstein MH, Hawkins MA, Kharofa J, Raldow AC, Sanford NN, Wojcieszysnki A, Olsen JR. Hits and Misses in Novel Pancreatic and Rectal Cancer Treatment Options. Int J Radiat Oncol Biol Phys. 2023 Mar 1;115(3):545-552. PubMed PMID: 36725162
  • Kim H, Olsen JR, Green OL, Chin RI, Hawkins WG, Fields RC, Hammill C, Doyle MB, Chapman W, Suresh R, Tan B, Pedersen K, Jansen B, DeWees TA, Lu E, Henke LE, Badiyan S, Parikh PJ, Roach MC, Wang-Gillam A, Lim KH. MR-Guided Radiation Therapy With Concurrent Gemcitabine/Nab-Paclitaxel Chemotherapy in Inoperable Pancreatic Cancer: A TITE-CRM Phase I Trial. Int J Radiat Oncol Biol Phys. 2023 Jan 1;115(1):214-223. PubMed PMID: 35878713
  • Chapman BC, Lai SH, Friedrich T, Lieu CH, Moskalenko M, Olsen JR, Herter W, Birnbaum EH, McCarter MD, Vogel JD. Rectal Cancer: Clinical and Molecular Predictors of a Complete Response to Total Neoadjuvant Therapy. Dis Colon Rectum. 2023 Apr 1;66(4):521-530. PubMed PMID: 34984995

Professional Memberships

  • American Society for Radiation Oncology (ASTRO), Member

Practice Locations

UCHealth Radiation Oncology - Memorial Hospital Central
525 Bob Peters Grove
Colorado Springs, CO 80909
719-365-6800

UCHealth Radiation Oncology - Memorial Hospital North
4080 Briargate Parkway
Colorado Springs, CO 80920
719-365-6800

Hospital Affiliation
  • University of Colorado Hospital
  • UCHealth Memorial Hospital

Center Affiliations

Specialty Information

Specialties
  • Radiation Oncology, Board Certification (2013)
Conditions & Treatments
  • Cancers
  • Cancers - Anal Cancer
  • Cancers - Biliary Cancer
  • Cancers - Bladder Cancer
  • Cancers - Colorectal Cancer
  • Cancers - Gastroenterologic Cancer (Colon, Stomach, Esophageal, Liver)
  • Cancers - Lymphoma
  • Cancers - Pancreatic Cancer
  • Cancers - Prostate Cancer
  • Cancers - Radiation Therapy
  • Cancers - Sarcoma
Clinical Interests
Dr. Olsen is a Professor of Radiation Oncology and serves as the Southern Colorado Division Head. He earned his medical degree and completed residency training at Washington University School of Medicine, St. Louis, Missouri, where he also served on faculty from 2012-2016. He has been board certified in radiation oncology through the American Board of Radiology since 2013, and joined the University of Colorado School of Medicine in 2016. He values time spent with patients and education regarding what to expect at each step of radiation treatment. Dr. Olsen has expertise in treatment of gastrointestinal, thyroid, and prostate/GU malignancies, in addition to application of stereotactic body radiotherapy/radiosurgery for a variety of cancer types. He has published over 50 peer reviewed articles, abstracts, and book chapters, and serves on national committees regarding incorporation of advanced imaging technology including MRI for radiotherapy delivery, development of national standards for GI malignancies. He has served as the GI Section Editor for the International Journal of Radiation Oncology, Biology, Physics, which is widely considered the most impactful radiation oncology medical journal. He currently serves as national co-chair for the ASTRO Healthcare Advisory Council, which functions to improve safety of radiation delivery at clinics across the country.