Daniel A Johnson, Ph.D., DABR

020 Stephenson Cancer Center-
Assistant Professor
Dept. Radiation Oncology
Adjunct Professor
Dept. Radiological Sciences
Email:  Daniel-Johnson@ouhsc.edu


Education:
BS, Physics, ​Western Illinois University, Macomb Illinois
MS, ​Radiological ​Physics, ​University of Oklahoma, Oklahoma City Oklahoma
PhD, ​Radiological ​Physics, ​University of Oklahoma, Oklahoma City Oklahoma
Board Certifications:

American Board of Radiology - Therapy Physics

Peer Reviewed Journal Publications:
 

  1. N. Arvindan, R. Madhusoodhanan, S. Ahmad, D. Johnson, T. Herman, Curcumin inhibits NFkB mediated radioprotection and module apoptosis related genes in human neuroblastoma cells, Cancer Biology and Therapy, 2008 Apr: 7(4): 569-576

     

  2. S. Ahmad, D. Johnson, J.R. Hiatt, D. T. Still, E. E. Furhang, D. Marsden, F. Kearly, D. A. Bernard, R. W. Holt, Comparison of tumor and normal tissue dose for accelerated partial breast irradiation using an electronic brachytherapy eBx source and an Iridium-192 source, Journal of Applied Clinical Medical Physics, 2010 March: 11(4): 155-161

     

  3. D. Johnson, S. Ahmad, Clinical implementation of an empirical method for electron output factor determination, Journal of X-ray Science and Technology, 2010 Aug: 18(3): 309-318

     

  4. J. P. Warrington, A. Csiszar, D. Johnson, T. Herman, S. Ahmad, Y. W. Lee, W. E. Sonntag, Cerebral microvascular rarefaction induced by whole brain radiation is reversible by systemic hypoxia in mice, American Journal of Physiology - Heart and Circulatory Physiology, 2011 March: 300(3): 736-744

     

  5. H. Jin, V.P. Keeling, D. Johnson, S. Ahmad, Interplay effect of angular dependence and calibration field size of MapCHECK 2 on RapidArc quality assurance, Journal of Applied Clinical Medical Physics, 2014 March: 15(3): 80-92

     

  6. D. Johnson, Y. Chen, S. Ahmad, Dose and linear energy transfer distributions of primary and secondary particles in carbon ion radiation therapy: A Monte Carlo simulation study in water, Journal of Medical Physics, 2015 Dec: 40(4): 214-219

     

  7. W. Taylor, D. Johnson, M. Johnson, S. Ahmad, Y. Chen, Dosimetric evaluation of tissue heterogeneity for electronic brachytherapy (EBT) source in high dose rate gynecological (GYN) irradiation, Fourteenth Mexican Symposium on Medical Physics, June, 2016

     

  8. C. Ferreira, D. Johnson, K. Rasmussen, C. Leinweber, S. Ahmad, J.W. Jung, A novel conformal superficial high-dose-rate brachytherapy device for the treatment of nonmelanoma skin cancer and keloids. Brachytherapy ·Jan. 2017

   Abstracts 

  1. N. Arvindan, R. Madhusoodhanan, S. Ahmad, D. Johnson, T. Herman, Curcumin disrupts radiation induced positive feedback (NFkB-TNFa-NFkB) cycle and inhibits NFkB mediated radio-adaptation in neuroblastoma cells, Poster presentation at the 13thInternational Congress of Radiation Research, San Francisco, California, July 8-12, 2007, (PS1189) page 97

     

  2. D. Johnson, S. Ahmad, Determination of Electron Output Factors Using An Empirical, Mathematical Model, Accepted for poster presentation at the 49th Annual Meeting of the American Association of Physicists in Medicine (AAPM), Minneapolis, Minnesota, July 22-26, 2007

     

  3. D. Johnson, I. Rutel, S. Ahmad, Xoft Axxent Electronic Brachytherapy System: A Clinical Implimentation Experience, Accepted for poster presentation at the 50th Annual Meeting of the American Association of Physicists in Medicine (AAPM), Houston, Texas, July 27-31, 2008

     

  4. R. Madhusoodhanan, T. Herman, A. Jamgade, N. Singh, S. Ahmad, D.Johnson and N. Aravindan, Differential expression of radiation induced genes in human neuroblastoma cells after single (10Gy) and fractionated ( 2Gy x 5) dose irradiation, Accepted for poster presentation at the 54th Annual meeting of the Radiation Research Society (RRS), Boston, September 21-24, 2008, PS3487, page 74

     

  5. J. P. Warrington, D. Johnson, S. Ahmad, T. Herman, W. Sonntag, Whole Brain Irradiation leads to Recruitment of Endothelial precursor cells, Presented at the 34th Annual Graduate Research Education and Technology Symposium, University of Oklahoma Health Sciences Center, March 31-April 1, 2009, Abstarct # 88

     

  6. J. P. Warrington, Y. W. Lee, D. Johnson, S. Ahmad, T. S. Herman and W. E. Sonntag, Effects of whole brain irradiation on the number of circulating endothelial precursor cells, Accepted for poster presentation at the Annual meeting for the society of Neuroscience; NEUROSCIENCE - 2009, Chicago, October 17 - 21, 2009

     

  7. D. Johnson, S. Ahmad, Comparison of Source Dwell Position Configuration in Single Catheter Balloon Partial Breast Brachytherapy, Accepted for poster presentation at the 27th Annual Meeting of the American College of Medical Physics (ACMP), San Antonio, Texas, May 22-25, 2010

     

  8. S. Ahmad, D. Johnson, J. Hiatt, D. Still, E. Furhang, D. Marsden, F. Kearly, D. Bernard and R. Holt, Comparison of Tumor and Normal Tissue Dose for Accelerated Partial Breast Irradiation Using an  Electronic Brachytherapy EBx Source and Iridium-192 Source, Accepted for poster presentation at the 52nd Annual Meeting of the American Association of Physicists in Medicine (AAPM), Philadelphia, Pennsylvania, July 18-22, 2010

     

  9. J. P. Warrington, A. Csiszar, D. Johnson, T. S. Herman, S Ahmad, Y. W. Lee, W. E. Sonntag, Systemic hypoxia reverses whole brain radiation-induced microvascular rarefaction, poster presentation at the Experimental Biology 2011 meeting of the American Physiological Society, Washington, DC, April 9-13, 2011. The FASEB Journal, 2011 25:636.15

     

  10. J. P. Warrington, A. Csiszar, D. Johnson, T. S. Herman, S Ahmad, Y. W. Lee, W. E. Sonntag, Systemic hypoxia reverses whole brain radiation-induced microvascular rarefaction, poster presentation at the Experimental Biology 2011 meeting of the American Physiological Society, Washington, DC, April 9-13, 2011. The FASEB Journal, 2011 25:636.15

     

  11. D. Johnson and S. Ahmad, A GEANT4 Simulation of Light-Ion Beams in Water, Poster presentation at the 53rd Annual Meeting of the American Association of Physicists in Medicine (AAPM) and 2011 Joint AAPM/COMP meeting, Vancouver, B. C., Canada July 31- Aug 04, 2011, SU-E-Exhibit Hall-706, Medical Physics, Vol. 38, No.6, June 2011 page 3652

     

  12. D. Johnson, Y. Chen and S. Ahmad, Secondary Light-Ions in Carbon-Ion Therapy: A GEANT4 Simulation of LET and Dose Contributions, Poster presentation at the 54th Annual Meeting of the American Association of Physicists in Medicine (AAPM), July 29- Aug 02, 2012, SU-E-T-281, Medical Physics, Vol. 39, No.6, June 2012, page 3768

     

  13. D. Johnson, Y. Chen, E. Schnell and S. Ahmad, A Preliminary Monte Carlo Simulation Study of the TrueBeam Linear Accelerator, Poster presentation at the 54th Annual Meeting of the American Association of Physicists in Medicine (AAPM), July 29- Aug 02, 2012, SU-E-T-498, Medical Physics, Vol. 39, No.6, June 2012, page 3820

     

  14. D. Johnson, Y. Chen, E. Schnell, S. Ahmad, A Monte Carlo Simulation Study of Photon Beam with Energies 6X, 10X, 6FFF, 10FFF from a TrueBeam Linear Accelerator, Posterpresentation at the 55th Annual Meeting of the American Association of Physicists in Medicine (AAPM), Indiana, August 04 - 08, 2013, SU-E-T-257, Medical Physics, Vol. 40, No.6, June 2013, page 263

     

  15. D. Johnson, Y. Chen and S. Ahmad, A Monte Carlo Simulation Study for Production and Subsequent Interaction of Secondary Particles From Carbon-Ion Radiation Therapy in Water, Poster presentation at the 55th Annual Meeting of the American Association of Physicists in Medicine (AAPM), August 04 - 08, 2013, SU-E-T-726, Medical Physics, Vol. 40, No.6, June 2013, page 373

     

  16. D. Johnson, M. Johnson, L. Chan, H. Hausen, J. Thompson and S. Ahmad, Electronic Brachytherapy (EBT) Treatment of Cervical Cancer - First Clinical Experience, Poster presentation at the 56th Annual Meeting of the American Association ofPhysicists in Medicine (AAPM), July 24 - 28, 2014, SU-E-T-447, Medical Physics, Vol. 40, No.6, June 2014, page 328

     

  17. M. Johnson, S. Ahmad, D. Johnson, Evaluation of Electronic Brachytherapy Dose Distributions in Tissue Equivalent Materials, Poster presentation at the 57th Annual Meeting of the American Association ofPhysicists in Medicine (AAPM), July 12 - 16, 2015, SU-E-T-388, Medical Physics, Vol. 42, No.6, June 2015

     

  18. C. Ferreira, S. Ahmad, B. Firestone, D. Johnson, C. Matthiesen, T. De La Fuente-Herman, Quantification of Dosimetric Uncertainty of I-125 COMS Eye Plaque, Poster presentation at the 57th Annual Meeting of the American Association ofPhysicists in Medicine (AAPM), July 12 - 16, 2015, SU-E-T-652, Medical Physics, Vol. 42, No.6, June 2015

     

  19. D. Johnson, C. Ferreira, S. Ahmad, Feasibility of 3D Printed Radiological Equivalent Customizable Tissue Like Materials, Poster presentation at the 57th Annual Meeting of the American Association ofPhysicists in Medicine (AAPM), July 12 - 16, 2015, SU-E-T-424, Medical Physics, Vol. 42, No.6, June 2015

     

  20. Y. Chen, M. Prusator, M. Islam, D. Johnson, S. Ahmad, Neutron Dose Survey of a Compact Single Room Proton Machine, Poster presentation at the 57th Annual Meeting of the American Association ofPhysicists in Medicine (AAPM), July 12 - 16, 2015, SU-E-T-568, Medical Physics, Vol. 42, No.6, June 2015

     

  21. Taylor, W., Johnson, D. , Ahmad, S. and Chen, Y. (2016), SU‐F‐T‐58: Dosimetric Evaluation of Breast Tissue Composition for Electronic Brachytherapy (BET) Source In High Dose Rate Accelerated Partial Breast (APBI) Irradiation. Med. Phys., 43: 3474-3475. doi:10.1118/1.4956193

     

  22. Pruett, J. , Chen, Y. , Ahmad, S. and Johnson, D. (2016), SU‐F‐T‐171: Manufacturing Cost Effective Heterogeneous Phantoms for Use in Proton Therapy. Med. Phys., 43: 3501-3501. doi:10.1118/1.4956308

     

  23. L Muller, D Johnson, S Ahmad, T De La Fuente Herman (2017), Dosimetric Evaluation of Available I‐125 High Activity Seeds for COMS Eye Plaques, Scientific Abstracts and Sessions. Med. Phys., 44: 2721-3318. doi:10.1002/mp.12304

     

  24. J Pruett, L Muller, S Ahmad, D Johnson (2017), The Development of Custom, Low‐Cost, Anthropomorphic Phantoms Constructed Via Additive Manufacturing, Scientific Abstracts and Sessions. Med. Phys., 44: 2721-3318. doi:10.1002/mp.12304

     

  25. L Muller, S Ahmad, D Johnson (2017), Evaluation of An AAA to Acuros Transition On Clinic Efficacy and Dosimetric Decision Making, Scientific Abstracts and Sessions. Med. Phys., 44: 2721-3318. doi:10.1002/mp.12304

     

  26. L Muller, S Ahmad, D Johnson (2018), Benchmarking of Eclipse Electron Monte Carlo Dose Calculation Algorithm for Smaller Fields and Anthropomorphic Challenges, Accepted for Annual Meeting AAPM, July 2018, Nashville TN

     

  27. L Muller, S Ahmad, D Johnson (2018), Benchmarking of Eclipse Electron Monte Carlo Dose Calculation Algorithm for Smaller Fields and Anthropomorphic Challenges, Accepted for Electronic Poster Presentation, Annual Meeting AAPM, July 2018, Nashville TN

     

  28. I Rutel, D Johnson (2018), Dosimetric Benchmarking of Novel Low-KVp Animal Irradiator, Accepted for Poster Presentation, Annual Meeting AAPM, July 2018, Nashville TN

 

Book Chapters 

  1. H Jin, D Johnson (2018), New Dosimetry Materials, Devices, and Systems (Chapter 11), s Kim, J Wong, Advanced and Emerging Technologies in Radiation Oncology Physics, CRC Press, 2018