Jonathan Farr, PhD
Jonathan Farr, PhD

Jonathan Farr, PhD

Associate Member, St. Jude Faculty

  • Chief, Radiation Physics



PhD – Wayne State University School of Medicine
BS – Eastern Michigan University College of Arts and Sciences

Research interests

  • Proton therapy
  • Development and metrology of highly conformal therapeutic irradiation systems
  • Advance treatment planning tools and techniques
  • Novel patient positioning and image guidance applications
  • Out-of-field radiation dose characterization

Read more about Dr. Farr's research interest.

Selected Publications

Thomadsen B, Nath R, Bateman FB, Farr J, Glisson C, Islam MK, LaFrance T, Moore ME, George Xu X, Yudelev M. Potential hazard due to induced radioactivity secondary to radiotherapy: the report of task group 136 of the American Association of Physicists in Medicine. Health Physics 107(5):442-460, 2014.

Merchant TE, Farr JB. Proton beam therapy: a fad or a new standard of care. Curr Opin Pediatr 26(1):3-8, 2013.

Farr JB, Dessy F, De Wilde O, Bietzer O, Schonenberg D. Fundamental radiological and geometric performance of two types of proton beam modulated discrete scanning systems. Med Phys 40(7):72101, 2013.

Stuschke M, Kaiser A, Pöttgen C, Lübke W, Farr J. Robust intensity modulated proton plans for dose escalation of locally advanced lung cancer in comparison to intensity modulated photon plans. Radiotherapy Oncology 2012 May 2. [Epub ahead of print]

Qamhiyeh S, Geismar D, Pöttgen C, Stuschke M, Farr JB. The effects of motion on the dose distribution of proton radiotherapy for prostate cancer. J Appl Clin Med Phys 13(3): 3–11, 2012.

Nichiporov DF, Hsi W-C, Farr JB. Beam Characteristics in Two Different Proton Uniform Scanning Systems: A Side-by-Side Comparison. Med Phys 39(5): 2559-2568, 2012.

Perez-Andujar A, DeLuca PM, Thornton A, Fitzek M, Hecksel D, Farr JB. Microdosimetric measurements for neutron dose determination during proton therapy. Radiation Protection Dosimetry 148, 2012.

Mukherjee B, Lambert J, Hentschel R, Negodin E, Farr J, Westdeutsches Protonentherapiezentrum Essen. An ultra-sensitive fast neutron area monitor using gadolinium covered aluminium oxide dosimeter (TLD-500) Chips. Radiation Measurements 46:1698-1700, 2011.

Hentschel R, Mukherjee B, Lambert J, Farr JB. Online Neutron Fluence Measurement at University Hospital Essen Neutron Therapy Facility using Gallium Arsenide LEDs. Radiation Measurements 46;1761-1764, 2011.

Mukherjee B, Lambert J, Hentschel R, Farr JB. Explicit Estimation of Out-Of-Field Neutron and Gamma Dose Equivalents during Proton Therapy using Thermo- luminescence Dosimeters. Radiation Measurements 8:1-4, 2011.

Baumer C, Farr JB. Lateral dose profile characterization in scanning particle therapy. Med Phys 38(6):2904-2913, 2011.

Mukherjee B, Hentschel R, Deya W, Simrock S, Farr JB. A novel wide range, real-time neutron fluence monitor based on commercial off the shelf gallium arsenide light emitting diodes. Nucl Instr and Meth A 652 384386, 2011.

Mukherjee B, Lambert J, Hentschel R, Farr JB. A cost effective, highly sensitive, passive neutron fluence monitor for nuclear contraband detection. Nucl Instr and Meth A 652 408411, 2011.

Farr JB, O'Ryan-Blair A, Jesseph F, Hsi W-C, Allgower CA, Mascia AE, Thornton AF, Schreuder AN; Midwest Proton Radiotherapy Institute. Validation of dosimetric field matching accuracy from proton therapy using a robotic patient positioning system. J Appl Clin Med Phys 11(2), 2010.

Hsi W-C, Moyers MF, Nichiporov D, Anferov V, Wolanski M, Allgower CE, Farr JB, Mascia AE, Schreuder AN. Energy spectrum control for modulated proton beams. Med Phys 36(6), 2009.

Hsi W-C, Schreuder AN, Moyers MF, Allgower CE, Farr JB, Mascia AE. Range and modulation dependencies for proton beam dose per monitor unit calculations. Med Phys 36(2), 2009.

Farr JB, Mascia AE, Allgower CE, Hsi W-C, Jesseph R, Wolanski M, Schreuder A, Nichiporov D, Anferov V. Clinical characterization of a proton beam continuous uniform scanning system with dose layer stacking. Med Phys 35(11), 2008.

Zhao L, Sandison GA, Farr JB, Hsi W-C, Li XA, Dosimetric impact of intrafraction motion for compensator-based proton therapy of lung cancer. Phys Med Biol 53:3343-3364, 2008.

Zhao L, Sandison GA, Farr JB, Wu H, Fitzek M. The Moving Target Induced Dosimetric Effect vs. Beam Direction in Proton Radiotherapy of Moving Lung Tumors. Proceedings, 2008 International Conference on BioMedical Engineering and Informatics, Hainan, China, pp. 804-808, 2008.

Hecksel D, Sandison GA, Farr JB, Edwards AC; Cyclotron Facility, Scattered neutron dose equivalent from an active scanning proton beam delivery System. Australas. Phys Eng Sci Med 30(4), 2007.

Thornton A, Fitzek F, Klein S, Dickey E, Sullivan M, O'Ryan-Blair A, Schreuder N, Allgower C, Mascia A, Farr J, Cameron J. Proton beam radiotherapy: a specialized treatment alternative. Commun Oncol 4, 2007.

Zhao L, Sandison GA, Farr JB, Hsi W-C, Li XA. Dosimetric Evaluation of MIP-Based Patient Aperture and Compensator Designs to Treat Lung Cancer Using Proton Therapy Under Free Breathing Conditions. Australas. Phys Eng Sci Med 30 (4), 2007.

Farr JB, Maughan RL, Yudelev M, Blosser E, Brandon J, Horste T, Forman JD, Radiologic Validation of a Fast Neutron Multi-leaf Collimator. Med Phys (9), 2007.

Nichiporov DF, Hsi W-C, Mascia AE, Farr JB, Schreuder AN. Multichannel detectors for profile measurements in clinical proton fields. Med Phys (7), 2007.

Allgower CE, Schreuder AN, Farr JB, Mascia AE. Experiences with an application of industrial robotics for accurate patient positioning in proton radiotherapy. Int J Med Robotics Comput Assist Surg (3), 2007.

Farr JB, Maughan RL, Yudelev M, Blosser E, Brandon J, Horste T, Forman JD. Compact multileaf collimator for conformal and intensity modulated fast neutron therapy: Electromechanical design and validation. Med Phys (9), 2009.

Hsi W-C, Schreuder N, Farr J, Allgower C, Mascia A; Midwest Proton Radiotherapy Institute. Modeling output factors of therapeutic proton beam formed by the passive double- scattering technique. Proceedings. 2006 World Congress on Medical Physics and Biomedical Engineering, Seoul, Korea, pp. 2227-2230, 2006.

Mesoloras G, Sandison GA, Stewart RD, Farr JB, Hsi W-C. Neutron scattered dose equivalent to a fetus from proton radiotherapy of the mother. Med Phys (7), 2006.

Kim A, Kim J-W, Hahn I, Schreuder N, Farr J. Simulations of Therapeutic Proton Beam Formation with GEANT4. Journal of the Korean Physical Society (2), 2005.

Yudelev M, Hunter S, Farr J; Midwest Proton Radiotherapy Institute and Indiana University. Thermoluminescence Dosimetry in Mixed Neutron Gamma Radiation Beam. Radiation Protection Dosimetry (110), 2004.

Last update: January 2015