Skip to main content

Stewart J. Becker, PhD, DABR

Academic Title:

Associate Professor

Primary Appointment:

Radiation Oncology

Additional Title:

Director - Medical Dosimetry Program & Radiation Safety Officer


UMMC/Gudelsky, GGJ04

Phone (Primary):




Education and Training

2000                B.A., Physics, Rice University          

2002                M.S., Medical Physics, University of Wisconsin-Madison   

2006                Ph.D., Medical Physics, University of Wisconsin-Madison, T. Rock Mackie

2014                Fellow, NYU Institute for Innovations in Medical Education


Dr. Becker is a board certified Medical Physicist. He received his PhD from University of Wisconsin-Madison in Medical Physics. Dr. Becker joined us, in 2014, from the NYU Langone Medical Center where he was a physicist in the Department of Radiation Oncology and scholar at the NYU Institute for Innovations in Medical Education.

Dr Becker is an internationally known expert in the GammaPod (a stereotactic radiosurgery techqiue for the breast) and has traveled the world assiting new centers in the installation of their GammaPods.  

Research/Clinical Keywords

GammaPod, radiosurgery

Highlighted Publications



Yi B, Becker S. Simplified method for determining dose to a non-water phantom through the use of ND,w and IAEA TRS 483 for the GammaPod. Phys Medica. 2021 Jul 6;88:138-141. doi: 10.1016/j.ejmp.2021.05.024. Epub ahead of print. PMID: 34242885.


Poirier Y, Becker SJ, Decesaris C, Gerry AJ, Culberson W, Draeger E, Johnstone C, Vujaskovic Z, Jackson The Impact of Radiation Energy on Dose Homogeneity and Organ Dose as a Function of Animal Size in the Gottingen Minipig Total Body Irradiation Model.  Rad Research, 2020 Nov 10;194(5):544-556. doi: 10.1667/RADE-20-00135.1. PMID: 33045066


Becker SJ, Sabouri P, Niu Y, Prado K, Chen S, Nichols E, Yi BY. “Commissioning and acceptance guide for the GammaPod”, Phys Med Biol. 2019 Sep 5. doi: 10.1088/1361-6560/ab41bd. [Epub ahead of print]

Draeger E, Sawant A, Johnstone C, Koger B, Becker S, Vujaskovic Z, Jackson IL, Poirier Y, “A Dose of Reality: How 20 Years of Incomplete Physics and Dosimetry Reporting in Radiobiology Studies May Have Contributed to the Reproducibility Crisis”, Int J of Radiat Onc Bio*Phys, Jul 1;81(2):568-74, 2019.

Xu, H., Lee, SW., Guerrero, M., Yi, B., Chen, S., Becker, S.J., Chung, H., Cheston, S., “Dosimetric effects of the kV based image-guided radiation therapy of prone breast external beam radiation: towards the optimized imaging frequency”, J App Clin Med Phys. 20 (1) 212-219, 2019

Badiyan, S., Bhooshan, N., Chuong, M., Sharma, N., Akhter, N., Etezadi, V., Hausner, P., Kudryasheva, S., Kaiser, A., Becker, S.J., Guerrero, M., Yi, B., “Correlation of radiation dose and activity with clinical outcomes in metastatic colorectal cancer after selective internal radiation therapy using yttrium-90 resin microspheres”, Nuclear Medicine Communications 39 (10), 915-920, 2018

Todar, D., Becker, S.J., Orton, C. "Brachytherapy is better than external beam therapy for partial breast irradiation," Point/Counterpoint, Med. Phys. 40,(2013)

Becker S.J., Culberson, W., Flynn, R.T. "Collision indicator charts for gantry-couch position combinations for Siemens Oncor and Elekta Infinity linacs", J App Clin Med Phys, 14(5), 278-83, 2013

Becker, S.J., Elliston, C., DeWyngaert, J.K., Jozsef, G., Brenner, D., and Formenti, S., "Breast radiotherapy in the prone position primarily reduces the maximum out-of-field measured dose to the ipsilateral lung," Med. Phys. 39, 2417-23, 2012; *Editor’s Pick Award*

Hardee M.E., Raza S., Becker S.J., Jozsef G., Lymberis S.C., Hochman T., Goldberg J.D., DeWyngaert K.J., Formenti S.C. "Prone Hypofractionated Whole-Breast Radiotherapy Without a Boost to the Tumor Bed: Comparable Toxicity of IMRT Versus a 3D Conformal Technique," Int J of Radiat Onc Bio Phys, Mar 1;82(3):415-23, 2012

Jozsef, G., DeWyngaert, J.K., Becker, S.J., Lymberis, S, and Formenti, S.C. "Prospective Study of Cone-Beam Computed Tomography Image-Guided Radiotherapy for Prone Accelerated Partial Breast Irradiation", Int J of Radiat Onc Bio Phys, Oct 1;81(2):568-74, 2011

Becker S.J. "Collision indicator charts for gantry-couch position combinations for Varian linacs", J App Clin Med Phys, Mar 2;12(3): 16-22, 2011

Becker, S.J., Jozsef, G., DeWyngaert, J.K. "Characterization of the Transmission of the Elekta Stereotactic Body Frame (ESBF) and Accounting for it During Treatment Planning", Med Dosim 34(2): 154-157, 2009

Becker, S. J., Patel, R. R. & Mackie, T. R. Increased skin dose with the use of a custom mattress for prone breast radiotherapy. Med Dosim 32, 196-199, 2007

Patel, R.R., Becker, S.J., Das, R.A., Mackie, T.R. "A Comparison of Accelerated Partial Breast Irradiation Techniques: Multi-catheter Interstitial Brachytherapy, 3D-CRT, and Supine versus Prone Helical Tomotherapy", Int J Radiat Oncol Biol Phys 68(3):935