Sohn Laboratory

Medical Physics and Engineering

Jason W. Sohn, Ph.D

Professor, Department of Radation Oncology
Associate Director, Division of Medical Physics and Dosimetry

  • Phone : 1-216-844-2736

  • Professional Qualification / Memberships

    Certified in Therapeutic Radiological Physics by the ABR in 1995
    Full member - American Association of Physicists in Medicine
    Full member - American Society for Therapeutic Radiology and Oncology


    Ph.D Degree, Biomedical Science, Medical College of Ohio, Toledo, OH
    M.S. Degree, Medical Physics, University of Wisconsin, Madison, WI

    Honors, Awards, and Elected offices

    Fellow of AAPM
    Examiner (oral test) for American Board of Radiology board, 2001-2004, 2006, 2008, 2010, 2012
    Radiation Therapy Committee member of AAPM, Jan. 2004 - 2006
    Committee member for Physicist Education in AAPM, 2001-Present
    President for the AAPM Missouri River Valley chapter, Jan. – Dec. 2002
    President-elect for the AAPM Missouri River Valley chapter, Jan. – Dec. 2001
    Committee member for Physician in training in AAPM, 1999-2003


    Biodegradable surgical markers : US 60/895586
    Radiation Shield (Mobile contra-lateral breast shield): PCT Application No. PCT/US00/14974

    Selected Publications

    1. S. B. Park, J. I. Monroe, M. Yao, M. Machtay, and J. W. Sohn
      Composite Radiation Dose Representation Using Fuzzy Set
      Information Sciences, Vol. 187, pp. 204-215, Mar 2012

    2. C. Woods, J.W. Sohn, M. Yao
      The Application of Positron Emission Tomography in Radiation Treatment Planning for Head and Neck Cancer
      PET Clinics, Vol. 6, pp. 149-163, 2011

    3. S.B. Park, F. Rhee, J.I. Monroe and J.W. Sohn
      Spatially Weighted Mutual Information Image Registration for Image Guided Radiation Therapy
      Medical Physics, vol. 37, no. 9, pp. 4590-4601, 2010

    4. S.B. Park, F. Rhee, and J.W. Sohn
      Spatially Weighted Mutual Information for Image Registration
      Journal of Engineering and Technology, vol. 18, pp. 23-31, 2008

    5. J.W. Sohn, D. Mansur, J.I. Monroe, R.E. Drzymala, H. Jin, T. Suk, J. Dempsey, E. Klein
      Automated EPID analysis of breast intrafractional and interfractional positioning error
      Korean Medical Physics journal, 17(1): 24-31, 2006

    6. A.V. Chevtsov, D. Calvetti, J.W. Sohn, T.J. Kinsella
      Regularization of inverse planning for intensity-modulated radiotherapy.
      Med. Phys. 32(2): 501-514, 2005

    7. M.S. Huq, J.W. Sohn, W.R. Hendee
      Over the foreseeable future, the growth in technical complexity of radiation therapy will continue to drive
      the demand for more medical physicists
      Med. Phys. 31(11): 2939-2941, 2004

    8. J.W. Sohn, J. F. Dempsey, Tae S. Suh, D.A. Low
      Analysis of Various Beamlet Sizes for IMRT with 6MV Photons
      Med. Phys. 30(9): 2432-2439, 2003

    9. D.A. Low, J.F. Dempsey, J. Markman, S. Mutic, E.E. Klein, J.W. Sohn, and J. A. Purdy
      Towards automated quality assurance for intensity-modulated radiation therapy.
      Int. J. Radiat. Oncol. Biol. Phys., 53(2): 443-452, 2001.

    10. D.A. Low, J.W. Sohn, E.E. Klein, J. Markman, S. Mutic, and J.F. Dempsey
      Characterization of a Commercial Multileaf Collimator Used for Intensity Modulated Radiation Therapy.
      Med. Phys. Vol. 28(5): 752-756, 2001.

    11. R.E. Drzymala, J.W. Sohn, C. Guo, L. G. Sobotka, and J.A. Purdy
      Angular Measurement of the Cobalt-60 Emitted Radiation Spectrum From a Radiosurgery Irradiator.
      Med. Phys. Vol. 28(4): 620-628, 2001.

    12. E.E. Klein, D.A. Low, J.W. Sohn, J.A. Purdy
      Differential Dosing of Prostate and Seminal Vesicles Using Dynamic Multileaf Collimation.
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 48: 1447-1456, 2000.

    13. J.H. Suh, G.H. Barnett, J.W. Sohn, P.A. Kupelian, Bruce H. Cohen
      Results of Linear Accelerator-Based Stereotactic Radiosurgery for Recurrent and Newly Diagnosed
      Acoustic Neuromas
      Radiat. Oncol. Invest. 90: 145-151, 2000.

    14. R.M. Macklis, R.L. Crownover, J. Crowe, T. Willoughby, J.W. Sohn
      Reducing Scatter Radiation to the Contralateral Breast With a Mobile, Conformal Shield
      During Breast Cancer Radiotherapy
      Am. J. Clin. Oncol. Vol. 22: 419-425, 1999

    15. J.W. Sohn, R.M. Macklis, J.H. Suh, P.A. Kupelian
      A Mobile Shield to Reduce Scatter Radiation to the Contralateral Breast During Radiotherapy
      for Breast Cancer: Preclinical Results
      Int. J. Radiat. Oncol. Biol. Phys. Vol. 43: 1037-1041, 1999

    16. J.H. Suh, G.H. Barnett, D. Miller, J.W. Sohn, E. Fernandez-Vicioso, P.A. Kupelian
      Results of Patients with Newly Diagnosed Single Brain Metastasis Treated with Stereotactic Radiosurgery
      with or without Whole Brain Radiation Therapy
      Radiosurgery, Vol. 2: 51-63, 1998

    17. E. Fernandez-Vicioso, J.H. Suh, P.A. Kupelian, J.W. Sohn, G.H. Barnett
      Analysis of Prognostic Factors for Patients with Single Brain Metastasis Treated with Stereotactic Radiosurgery
      Radiat. Oncol. Invest., Vol. 5: 31-37, 1997

    18. J. Katcher, P.A. Kupelian, C. Zippe, E.A. Klein, J.W. Sohn
      Indications for Excluding the Seminal Vesicles when Treating Clinically Localized Prostatic Adenocarcinoma
      with Radiotherapy Alone
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 37: 871-876, 1997

    19. C.E. DeMagri, J.W. Sohn, V. Smith, A. Perec, D.A. Larson, M.C. Schell
      Method of Developing an Interlock System for Linac-Based Stereotactic Radiosurgery
      Radiat. Oncol. Invest., Vol. 4: 287-291, 1996

    20. S. Pohar, J.W. Sohn, S. Esposito
      A Comparison of Two Techniques Used to Reduce Mandibular Dose in Oral Cavity Interstitial Brachytherapy
      Endocurietherapy / Hyperthermia Oncology Int. Journal, Vol. 12: 159-164,1996

    21. J.W. Sohn, J.G. Dalzell, J.H. Suh, M. Tefft, M.C. Schell
      Dose Volume Histogram Analysis of Techniques for Irradiating Pituitary Adenomas
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 32: 831-837, 1995

    22. J.W. Sohn, J.H. Suh, S. Pohar
      A Method for Delivering Accurate and Uniform Radiation Dosages to the Head and Neck with Asymmetric Collimators
      and a Single Isocenter
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 32: 809-813, 1995

    23. Correspondence: In response to Dr. Harari
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 33: 972, 1995

    24. P.D. Higgins, J.W. Sohn, R. Fine, M.C. Schell
      3-D Conformal Pancreas Treatment: Comparison of 4 to 6 Field Techniques
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 31: 605-609, 1995

    25. P.D. Higgins, C.H. Sibata, L. Siskind, J.W. Sohn
      Deconvolution of detector size effect for small field measurement
      Med. Phys., Vol. 22(10):1663-1666, 1995

    26. J.W. Sohn, M.C. Schell, K.K. Dass, J.H. Suh, M. Tefft
      Uniform Irradiation of the Craniospinal Axis with a Penumbra Modifier and an Asymmetric Collimator
      Int. J. Radiat. Oncol. Biol. Phys., Vol. 29:187-190, 1994

    27. M.A. Holmes, T.R. Mackie, J.W. Sohn, P.J. Reckwerdt, T.J. Kinsella, A.F. Bielajew, D.W.O. Rogers
      The Application of Correlated Sampling to the Computation of Electron Beam Dose Distributions in Heterogeneous
      Phantoms using the Monte Carlo Method
      Phys. in Med. & Biol., Vol. 38:675-688, 1993

    28. P.D. Higgins, J.W. Sohn, C.H. Sibata, W.A. McCarthy
      Scatter Factor Correlations for Elongated Fields
      Med. Phys., Vol. 16(5):800-806, 1989

    last modified 2016-04-01 16:39:04
    © 2012, Radiation Physics and Engineering Lab. Case Western Reserve University
    Cleveland, Ohio 44106 | Phone: 216-368-6583 |