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Lijun Ma, Ph.D.


Dr. Lijun Ma is a physicist who specializes in stereotactic radiosurgery and stereotactic body radiotherapy (SBRT). He develops complex treatment plans and supervises quality management programs for patients undergoing radiosurgery and SBRT, including treatment with the Gamma Knife. Ma has developed and implemented several procedures and protocols that improved radiosurgery and radiotherapy. His research and clinical interests include intracranial and spinal radiosurgery, SBRT, breast and prostate cancer treatments and outcome studies.

Ma earned a Ph.D. from the University of North Carolina at Chapel Hill and completed postdoctoral fellowships at Stanford University and clinical rotations at UCSF. He is the recipient of numerous awards, including the principal investigator Idea Award from the Department of Defense Breast Cancer Research Program and Teacher of the Year Award from the American Association of Residents in Radiation Oncology. He has authored more than 100 peer-reviewed research articles and holds multiple U.S. patents related to cancer treatment techniques with radiation. Ma is a professor in residence of radiation oncology physics at UCSF.

Conditions & Treatments

More about Lijun Ma


University of North Carolina, Physics 1995

Selected Research and Publications

  1. Ma L, Sahgal A, Larson DA. Letter: Volumetric Arc Therapy (RapidArc) vs Gamma Knife Radiosurgery for Multiple Brain Metastases. Neurosurgery. 2015 Mar; 76(3):E353.
  2. Ma L, Mason E, Sneed PK, McDermott M, Polishchuk A, Larson DA, Sahgal A. Clinical realization of sector beam intensity modulation for gamma knife radiosurgery: a pilot treatment planning study. Int J Radiat Oncol Biol Phys. 2015 Mar 1; 91(3):661-8.
  3. Ma L, Sahgal A, Larson DA, Pinnaduwage D, Fogh S, Barani I, Nakamura J, McDermott M, Sneed P. Impact of millimeter-level margins on peripheral normal brain sparing for gamma knife radiosurgery. Int J Radiat Oncol Biol Phys. 2014 May 1; 89(1):206-13.
  4. Ma L, Pinnaduwage D, McDermott M, Sneed PK. Whole-procedural radiological accuracy for delivering multi-session gamma knife radiosurgery with a relocatable frame system. Technol Cancer Res Treat. 2014 Oct; 13(5):403-8.
  5. Wahl M, Hwang A, Nakamura J, Barani I, Fogh S, Sneed P, McDermott M, Sahgal A, Ma L. Individual beam sharpening improves composite dose fall-off near a target for non-isocentric cyberknife radiosurgery. Technol Cancer Res Treat. 2013 Aug; 12(4):341-8.
  6. Fogh S, Ma L, Gupta N, Sahgal A, Nakamura JL, Barani I, Sneed PK, McDermott M, Larson DA. High-precision volume-staged Gamma Knife surgery and equivalent hypofractionation dose schedules for treating large arteriovenous malformations. J Neurosurg. 2012 Dec; 117 Suppl:115-9.
  7. Ma L, Sahgal A, Nie K, Hwang A, Karotki A, Wang B, Shrieve DC, Sneed PK, McDermott M, Larson DA. Reliability of contour-based volume calculation for radiosurgery. J Neurosurg. 2012 Dec; 117 Suppl:203-10.
  8. Ma L, Kirby N, Korol R, Larson DA, Sahgal A. Assessing small-volume spinal cord dose for repeat spinal stereotactic body radiotherapy treatments. Phys Med Biol. 2012 Dec 7; 57(23):7843-51.
  9. Sahgal A, Weinberg V, Ma L, Chang E, Chao S, Muacevic A, Gorgulho A, Soltys S, Gerszten PC, Ryu S, Angelov L, Gibbs I, Wong CS, Larson DA. Probabilities of radiation myelopathy specific to stereotactic body radiation therapy to guide safe practice. Int J Radiat Oncol Biol Phys. 2013 Feb 1; 85(2):341-7.
  10. Descovich M, Ma L, Chuang CF, Larson DA, Barani IJ. Comparison between prone and supine patient setup for spine stereotactic body radiosurgery. Technol Cancer Res Treat. 2012 Jun; 11(3):229-36.
  11. Lightstone AW, Tsao M, Baran PS, Chan G, Pang G, Ma L, Lochray F, Sahgal A. Cone beam CT (CBCT) evaluation of inter- and intra-fraction motion for patients undergoing brain radiotherapy immobilized using a commercial thermoplastic mask on a robotic couch. Technol Cancer Res Treat. 2012 Jun; 11(3):203-9.
  12. Hyde D, Lochray F, Korol R, Davidson M, Wong CS, Ma L, Sahgal A. Spine stereotactic body radiotherapy utilizing cone-beam CT image-guidance with a robotic couch: intrafraction motion analysis accounting for all six degrees of freedom. Int J Radiat Oncol Biol Phys. 2012 Mar 1; 82(3):e555-62.
  13. Sahgal A, Ma L, Fowler J, Weinberg V, Gibbs I, Gerszten PC, Ryu S, Soltys S, Chang E, Wong CS, Larson DA. Impact of dose hot spots on spinal cord tolerance following stereotactic body radiotherapy: a generalized biological effective dose analysis. Technol Cancer Res Treat. 2012 Feb; 11(1):35-40.
  14. Lo SS, Sahgal A, Ma L, Chang EL. Advances in radiation therapy of brain metastasis. Prog Neurol Surg. 2012; 25:96-109.
  15. Masucci GL, Yu E, Ma L, Chang EL, Letourneau D, Lo S, Leung E, Chao S, Hyde D, Gorgulho A, Muacevic A, Larson DA, Fehlings MG, Sahgal A. Stereotactic body radiotherapy is an effective treatment in reirradiating spinal metastases: current status and practical considerations for safe practice. Expert Rev Anticancer Ther. 2011 Dec; 11(12):1923-33.
  16. Shiao SL, Sahgal A, Hu W, Jabbari S, Chuang C, Descovich M, Hsu IC, Gottschalk AR, Roach M, Ma L. Temporal compartmental dosing effects for robotic prostate stereotactic body radiotherapy. Phys Med Biol. 2011 Dec 21; 56(24):7767-75.
  17. Caballero JA, Sneed PK, Lamborn KR, Ma L, Denduluri S, Nakamura JL, Barani IJ, McDermott MW. Prognostic factors for survival in patients treated with stereotactic radiosurgery for recurrent brain metastases after prior whole brain radiotherapy. Int J Radiat Oncol Biol Phys. 2012 May 1; 83(1):303-9.
  18. Ma L, Lee L, Barani I, Hwang A, Fogh S, Nakamura J, McDermott M, Sneed P, Larson DA, Sahgal A. Shot sequencing based on biological equivalent dose considerations for multiple isocenter Gamma Knife radiosurgery. Phys Med Biol. 2011 Nov 21; 56(22):7247-56.
  19. Ma L, Sahgal A, Hwang A, Hu W, Descovich M, Chuang C, Barani I, Sneed PK, McDermott M, Larson DA. A two-step optimization method for improving multiple brain lesion treatments with robotic radiosurgery. Technol Cancer Res Treat. 2011 Aug; 10(4):331-8.
  20. Ma L, Petti P, Wang B, Descovich M, Chuang C, Barani IJ, Kunwar S, Shrieve DC, Sahgal A, Larson DA. Apparatus dependence of normal brain tissue dose in stereotactic radiosurgery for multiple brain metastases. J Neurosurg. 2011 Jun; 114(6):1580-4.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.