Western College of Veterinary Medicine

Research Area(s)

  • Veterinary radiation oncology, medical physics, oncologic imaging


After spending several years in companion animal practice, Dr. Mayer completed a 14-month radiation and medical oncology internship at a private referral centre in southern California. That experience led to a two-year radiation oncology residency at Colorado State University where Mayer focused on radiation biology and participated in cutting-edge research involving radiation field hyperthermia therapy and gene therapy.

In 2004, Mayer completed her Master of Radiological Health degree at CSU and became a board-certified radiation oncologist.

Academic Credentials

  • DVM, Western College of Veterinary Medicine
  • Internship, Radiation and Medical Oncology, All-Care Animal Referral Center, Fountain Valley, California
  • Master of Science, Mammalian Radiobiology, Colorado State University
  • Diplomate, American College of Veterinary Radiology (Radiation Oncology)

Research Interests

Dr. Mayer has played a lead role in developing WCVM's radiation oncology program. The program includes radiation therapy services as well as teaching for undergraduate and graduate students. It also involves collaborative research with other WCVM scientists and with human medicine researchers at the University of Saskatchewan's College of Medicine, at the Saskatoon Cancer Centre and at other oncology centres in North America.


  • Gagnon, J., Mayer, M.N., Belosowsky, T., Mauldin, G.N., Waldner, C.L.  2020.  Stereotactic body radiation therapy for treatment of soft tissue sarcomas in 35 dogs.  Journal of the American Veterinary Medical Association, 256(1): 102-110.  https://www.doi.org/10.2460/javma.256.1.102

  • Morimoto, C.Y., Mayer, M.N., Sidhu, N., Bloomfield, R., Waldner, C.L.  2020.  Residual setup error in the canine intracranial region after megavoltage, kilovoltage, or cone-beam computed tomographic image guidance for radiation therapy.  Veterinary and Comparative Oncology, 18(2): 199-205.  https://www.doi.org/10.1111/vco.1253

  • Morimoto, C.Y., Mayer, M.N., Sidhu, N., Bloomfield, R., Waldner, C.L.  2020.  Setup error with and without image guidance using two canine intracranial positioning systems for radiation therapy.  Veterinary and Comparative Oncology, 18(4): 607-614.  https://www.doi.org/10.1111/vco.12584

  • Morimoto, C.Y., Waldner, C.L., Fan, V., Sidhu, N., Matthews, Q., Randall, E., Griffin, L., Keyerleber, M., Rancilio, N., Vanhaezebrouck, I., Zwueste, D., Mayer, M.N.  2020.  Use of MRI increases interobserver agreement on gross tumor volume for imaging-diagnosed canine intracranial meningioma.  Veterinary Radiology and Ultrasound, 61(6): 726-737.  https://www.doi.org/10.1111/vru.12915Mayer, M.N.,

  • Dewalt, J.O., Sidhu, N., Mauldin, G.N., Waldner, C.L.  2019.  Outcomes and adverse effects associated with stereotactic body radiation therapy in dogs with nasal tumors: 28 cases (2011-2016).  Journal of the American Veterinary Medical Association, 254(5): 602-612.  https://www.doi.org/10.2460/javma.254.5.602 

  • Mayer, M.N., Koehncke, N.K., Sidhu, N., Gallagher, T., Waldner, C.L.  2019.  Effect of full versus open-palm hand shielding on worker radiation dose during manual restraint for small animal radiography.  Canadian Journal of Veterinary Research, 83(2): 154-158.

  • Mayer, M.N., Koehncke, N.K., Sidhu, N., Gallagher, T., Waldner, C.L.  2019.  Use of protective hand shielding by veterinary workers during small animal radiography.  Canadian Veterinary Journal, 60(3): 249-254.

  • Mayer, M.N., Koehncke, N.K., Taherian, A.C., Waldner, C.L.  2019.  Self-reported use of x-ray personal protective equipment by Saskatchewan veterinary workers.  Journal of the American Veterinary Medical Association, 254(3): 409-417.  https://www.doi.org/10.2460/javma.254.3.409

  • Belotta, A.F., Teixeira, C.R., Padovani, C.R., Rahal, S.C., Mayer, M.N., Mamprim, M.J.  2018.  Sonographic evaluation of liver hemodynamic indices in overweight and obese dogs.  Journal of Veterinary Internal Medicine, 32(1): 181-187.  https://www.doi.org/10.1111/jvim.14883

  • Fan, V.C., Mayer, M.N., Sukut, S.L., Gustafson, N.R., Mauldin, G.N., Waldner, C.L.  2018.  Retrospective survey of owners’ experiences with palliative radiation therapy for pets.  Journal of the American Veterinary Medical Association, 253(3): 307-314.  https://www.doi.org/10.2460/javma.253.3.307

  • Mayer, M.N., Koehncke, N.K., Belotta, A.F., Cheveldae, I.T., Waldner, C.L.  2018.  Use of personal protective equipment in a radiology room at a veterinary teaching hospital.  Veterinary Radiology and Ultrasound, 59(2): 137-146.  https://www.doi.org/10.1111/vru.12583

  • Mayer, M.N., Sweet, K.A., Patsikas, M.N., Sukut, S.L., Waldner, C.L.  2018.  Frequency of an accessory popliteal efferent lymphatic pathway in dogs.  Veterinary Radiology and Ultrasound, 59(3): 365-373.  https://www.doi.org/10.1111/vru.12600

  • Desprez, I., Yabsley, M.J., Fogelson, S.B., Hicks, J.A., Barber, R., Sladakovic, I., Secrest, S.A., Divers, S.J., Mayer, J.  2017.  Baylisascaris procyonis larva migrans in two captive North American beavers (Castor canadensis).  Journal of Zoo and Wildlife Medicine, 48(1): 232-236.  https://www.doi.org/10.1638/2016-0102.1

  • Mayer, M.N., Lanovaz, J.L., Smith, M.J., Sidhu, N., Waldner, C.L.  2013.  Use of a real-time three-dimensional motion tracking system for measurement of intrafractional motion of the thoracic wall in dogs.  American Journal of Veterinary Research, 74(1): 11-16.  https://www.doi.org/10.2460/ajvr.74.1.11

  • Mayer, M.N., Silver, T.I., Lowe, C.K., Anthony, J.M.  2013.  Radiographic lymphangiography in the dog using iodized oil.  Veterinary Comparative Oncology, 11(2): 151-161.  https://www.doi.org/10.1111/j.1476-5829.2012.00334.x

  • Mayer, M.N., Kraft, S.L., Bucy, D.S., Waldner, C.L., Elliot, K.M., Wiebe, S.  2012.  Indirect magnetic resonance lymphography of the head and neck of dogs using Gadofluorine M and a conventional gadolinium contrast agent: A pilot study. Canadian Veterinary Journal, 53(11): 1207-1210. 

  • Pinard, C.L., Mutsaers, A.J., Mayer, M.N., Woods, J.P.  2012.  Retrospective and review of ocular radiation side effects following external-beam Co-60 radiation therapy in 37 dogs and 12 cats. Canadian Veterinary Journal, 53(12): 1301-1307. 

  • Silver, T.I., Lawson, J.A., Mayer, M.N.  2012.  Sonographic characteristics of presumptively normal main axillary and superficial cervical lymph nodes in dogs.  American Journal of Veterinary Research, 73(8): 1200-1206. https://www.doi.org/10.2460/ajvr.73.8.1200

  • Wobeser, B.K., Hill, J.E., Jackson, M.L., Kidney, B.A., Mayer, M.N., Townsend, H.G., Allen, A.L.  2012.  Localization of Bovine papillomavirus in equine sarcoids and inflammatory skin conditions of horses using laser microdissection and two forms of DNA amplification.  Journal of Veterinary Diagnostic Investigation, 24(1): 32-41.  https://www.doi.org/10.1177/1040638711425952