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The Department of Radiological Sciences Graduate Program in Medical Physics is comprised of faculty physicists from both the Department of Radiological Sciences and the Department of Radiation Oncology. With over a century of combined experience in the field of Medical Physics, the faculty governing the program provides both state-of-the-art research opportunities and education experience. The faculty in each department provide mentoring to graduate students who gain experience both in the clinical and scientific realms.

Radiation Oncology

Erich Schnell, Ph.D., DABR

Assistant Professor

Adjunct Professor


B.A., Physics, Carleton College, Northfield, MN
M.S., Medical Physics, Duke University, Durham, NC
Ph.D., Medical Physics, University of Oklahoma HSC, Oklahoma City, OK

Board Certification(s):

American Board of Radiology – Therapeutic Medical Physics


Medical Physics (Radiation Therapy), Department of Radiation Oncology, University of Oklahoma HSC, Oklahoma City, OK

Clinical/Research Interests:

Gynecologic High Dose Rate Brachytherapy treatment planning and dose calculation, Intensity modulated radiation therapy (IMRT) treatment planning, Intensity modulated proton therapy (IMPT) treatment planning.

Select Publications:

Schnell, E., Thompson, S., Ahmad, S., Herman, T. S., & De La Fuente Herman, T. (2019). Dosimetric considerations when utilizing Venezia, Capri, Rotte double tandem, and tandem and ring with interstitial needles for the treatment of gynecological cancers with high dose rate brachytherapy. Medical Dosimetry. In Press, Corrected Proof, Available online 14 May 2019.

Ahmed, M. F., Eller, S. A., Schnell, E., Ahmad, S., Akselrod, M. S., Hanson, O. D., & Yukihara, E. G. (2014). Development of a 2D dosimetry system based on the optically stimulated luminescence of Al2O3. Radiation Measurements, 71, 187-192.

Ahmed, M. F., Schnell, E., Ahmad, S., & Yukihara, E. G. (2016). Image reconstruction algorithm for optically stimulated luminescence 2D dosimetry using laser-scanned Al2O3: C and Al2O3: C, Mg films. Physics in Medicine & Biology, 61(20), 7484.

Ahmed, M. F., Shrestha, N., Schnell, E., Ahmad, S., Akselrod, M. S., & Yukihara, E. G. (2016). Characterization of Al2O3 optically stimulated luminescence films for 2D dosimetry using a 6 MV photon beam. Physics in Medicine & Biology, 61(21), 7551.

Ahmed, M. F., Shrestha, N., Ahmad, S., Schnell, E., Akselrod, M. S., & Yukihara, E. G. (2017). Demonstration of 2D dosimetry using Al2O3 optically stimulated luminescence films for therapeutic megavoltage x-ray and ion beams. Radiation Measurements106, 315-320.

De La Fuente Herman, T., Schnell, E., Young, J., Hildebrand, K., Algan, Ö., Syzek, E., Herman T. & Ahmad, S. (2013). Dosimetric comparison between IMRT delivery modes: Step-and-shoot, sliding window, and volumetric modulated arc therapy—for whole pelvis radiation therapy of intermediate-to-high risk prostate adenocarcinoma. Journal of Medical Physics, 38(4), 165-172.

Schnell, E., Samei, E., & Dobbins, J. T. (2012). Plate‐specific gain map correction for the improvement of detective quantum efficiency in computed radiography. Medical physics39(3), 1495-1504.

Schnell, E., Ahmad, S., & De La Fuente Herman, T. (2016, June). Commissioning of a relative stopping power to Hounsfield unit calibration curve for a Mevion proton radiation treatment unit. In AIP Conference Proceedings (Vol. 1747, No. 1, 110004). AIP Publishing.

Schnell, E., Herman, T. D. L. F., Young, J., Hildebrand, K., Algan, O., Syzek, E., & Ahmad, S. (2012, October). Dosimetric comparison of volumetric modulated Arc therapy, step-and-shoot, and sliding window IMRT for prostate cancer. In AIP Conference Proceedings (Vol. 1494, No. 1, pp. 23-26). AIP.