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Lijun Ma, PhD

TitleProfessor
SchoolUCSF School of Medicine
DepartmentRadiation Oncology
Address505 Parnassus Ave, Long
San Francisco CA 94143
Phone415-353-8932
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Ma L, Wang L, Tseng CL, Sahgal A. Emerging technologies in stereotactic body radiotherapy. Chin Clin Oncol. 2017 Sep; 6(Suppl 2):S12. PMID: 28917250.
      View in: PubMed
    2. Chiu J, Pierce M, Braunstein SE, Theodosopoulos PV, McDermott MW, Sneed PK, Ma L. Sharpening peripheral dose gradient via beam number enhancement from patient head tilt for stereotactic brain radiosurgery. Phys Med Biol. 2016 Oct 03; 61(20):N532-N541. PMID: 27694708.
      View in: PubMed
    3. Ma L, Braunstein SE, Theodosopoulos PV, McDermott MW, Sneed PK. Inherent functional dependence among cochlear dose surrogates for stereotactic radiosurgery of vestibular schwannomas. Pract Radiat Oncol. 2017 Jan - Feb; 7(1):e1-e7. PMID: 27742557.
      View in: PubMed
    4. Chang JS, Perez-Andujar A, Barani IJ, Ma L, Larson DA. Estimating the probability of underdosing microscopic brain metastases with hippocampal-sparing whole-brain radiation. Radiother Oncol. 2016 Aug; 120(2):248-52. PMID: 27406442.
      View in: PubMed
    5. Chang JS, Ma L, Barani IJ, McDermott MW, Sneed PK, Larson DA. Hippocampal Dose With Radiosurgery for Multiple Intracranial Targets: The Rationale for Proactive Beam Shaping. Technol Cancer Res Treat. 2016 Aug; 15(4):555-9. PMID: 26113558.
      View in: PubMed
    6. 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. PMID: 25599216.
      View in: PubMed
    7. 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 01; 91(3):661-8. PMID: 25542309.
      View in: PubMed
    8. 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 01; 89(1):206-13. PMID: 24725703.
      View in: PubMed
    9. Ma L, Nichol A, Hossain S, Wang B, Petti P, Vellani R, Higby C, Ahmad S, Barani I, Shrieve DC, Larson DA, Sahgal A. Variable dose interplay effects across radiosurgical apparatus in treating multiple brain metastases. Int J Comput Assist Radiol Surg. 2014 Nov; 9(6):1079-86. PMID: 24748208; PMCID: PMC4215114.
    10. 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. PMID: 24000986; PMCID: PMC4527471.
    11. 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. PMID: 23369157.
      View in: PubMed
    12. 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. PMID: 23205798.
      View in: PubMed
    13. 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. PMID: 23205811.
      View in: PubMed
    14. 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 07; 57(23):7843-51. PMID: 23135285.
      View in: PubMed
    15. 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 01; 85(2):341-7. PMID: 22713832.
      View in: PubMed
    16. 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. PMID: 22468994.
      View in: PubMed
    17. 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. PMID: 22376132.
      View in: PubMed
    18. 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 01; 82(3):e555-62. PMID: 22284042.
      View in: PubMed
    19. 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. PMID: 22181329.
      View in: PubMed
    20. Lo SS, Sahgal A, Ma L, Chang EL. Advances in radiation therapy of brain metastasis. Prog Neurol Surg. 2012; 25:96-109. PMID: 22236671.
      View in: PubMed
    21. 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. PMID: 22117159.
      View in: PubMed
    22. 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. PMID: 22107791.
      View in: PubMed
    23. 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 01; 83(1):303-9. PMID: 22079723.
      View in: PubMed
    24. 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. PMID: 22037677.
      View in: PubMed
    25. 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. PMID: 21728390.
      View in: PubMed
    26. 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. PMID: 21375377.
      View in: PubMed
    27. Sahgal A, Bilsky M, Chang EL, Ma L, Yamada Y, Rhines LD, Létourneau D, Foote M, Yu E, Larson DA, Fehlings MG. Stereotactic body radiotherapy for spinal metastases: current status, with a focus on its application in the postoperative patient. J Neurosurg Spine. 2011 Feb; 14(2):151-66. PMID: 21184635.
      View in: PubMed
    28. Jabbari S, Weinberg VK, Kaprealian T, Hsu IC, Ma L, Chuang C, Descovich M, Shiao S, Shinohara K, Roach M, Gottschalk AR. Stereotactic body radiotherapy as monotherapy or post-external beam radiotherapy boost for prostate cancer: technique, early toxicity, and PSA response. Int J Radiat Oncol Biol Phys. 2012 Jan 01; 82(1):228-34. PMID: 21183287.
      View in: PubMed
    29. Descovich M, Sneed PK, Barbaro NM, McDermott MW, Chuang CF, Barani IJ, Nakamura JL, Lijun M. A dosimetric comparison between Gamma Knife and CyberKnife treatment plans for trigeminal neuralgia. J Neurosurg. 2010 Dec; 113 Suppl:199-206. PMID: 21222296.
      View in: PubMed
    30. Ma L, Sahgal A, Cozzi L, Chang E, Shiu A, Letourneau D, Yin FF, Fogliata A, Kaissl W, Hyde D, Laperriere NJ, Shrieve DC, Larson DA. Apparatus-dependent dosimetric differences in spine stereotactic body radiotherapy. Technol Cancer Res Treat. 2010 Dec; 9(6):563-74. PMID: 21070078.
      View in: PubMed
    31. Sahgal A, Ma L, Weinberg V, Gibbs IC, Chao S, Chang UK, Werner-Wasik M, Angelov L, Chang EL, Sohn MJ, Soltys SG, Létourneau D, Ryu S, Gerszten PC, Fowler J, Wong CS, Larson DA. Reirradiation human spinal cord tolerance for stereotactic body radiotherapy. Int J Radiat Oncol Biol Phys. 2012 Jan 01; 82(1):107-16. PMID: 20951503.
      View in: PubMed
    32. Novotny J, Bhatnagar JP, Chung HT, Johansson J, Bednarz G, Ma L, Huq MS. Assessment of variation in Elekta plastic spherical-calibration phantom and its impact on the Leksell Gamma Knife calibration. Med Phys. 2010 Sep; 37(9):5066-71. PMID: 20964226.
      View in: PubMed
    33. Sahgal A, Barani IJ, Novotny J, Zhang B, Petti P, Larson DA, Ma L. Prescription dose guideline based on physical criterion for multiple metastatic brain tumors treated with stereotactic radiosurgery. Int J Radiat Oncol Biol Phys. 2010 Oct 01; 78(2):605-8. PMID: 20472351.
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    34. Ma L, Sahgal A, Descovich M, Cho YB, Chuang C, Huang K, Laperriere NJ, Shrieve DC, Larson DA. Equivalence in dose fall-off for isocentric and nonisocentric intracranial treatment modalities and its impact on dose fractionation schemes. Int J Radiat Oncol Biol Phys. 2010 Mar 01; 76(3):943-8. PMID: 20159366.
      View in: PubMed
    35. Hossain S, Xia P, Huang K, Descovich M, Chuang C, Gottschalk AR, Roach M, Ma L. Dose gradient near target-normal structure interface for nonisocentric CyberKnife and isocentric intensity-modulated body radiotherapy for prostate cancer. Int J Radiat Oncol Biol Phys. 2010 Sep 01; 78(1):58-63. PMID: 20133073.
      View in: PubMed
    36. Sahgal A, Ma L, Gibbs I, Gerszten PC, Ryu S, Soltys S, Weinberg V, Wong S, Chang E, Fowler J, Larson DA. Spinal cord tolerance for stereotactic body radiotherapy. Int J Radiat Oncol Biol Phys. 2010 Jun 01; 77(2):548-53. PMID: 19765914.
      View in: PubMed
    37. Klein EE, Hanley J, Bayouth J, Yin FF, Simon W, Dresser S, Serago C, Aguirre F, Ma L, Arjomandy B, Liu C, Sandin C, Holmes T. Task Group 142 report: quality assurance of medical accelerators. Med Phys. 2009 Sep; 36(9):4197-212. PMID: 19810494.
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    38. Ma L, Sahgal A, Hossain S, Chuang C, Descovich M, Huang K, Gottschalk A, Larson DA. Nonrandom intrafraction target motions and general strategy for correction of spine stereotactic body radiotherapy. Int J Radiat Oncol Biol Phys. 2009 Nov 15; 75(4):1261-5. PMID: 19647951.
      View in: PubMed
    39. Sahgal A, Ma L, Chang E, Shiu A, Larson DA, Laperriere N, Yin FF, Tsao M, Menard C, Basran P, Létourneau D, Heydarian M, Beachey D, Shukla V, Cusimano M, Hodaie M, Zadeh G, Bernstein M, Schwartz M. Advances in technology for intracranial stereotactic radiosurgery. Technol Cancer Res Treat. 2009 Aug; 8(4):271-80. PMID: 19645520.
      View in: PubMed
    40. Ma L, Kjäll P, Novotny J, Nordström H, Johansson J, Verhey L. A simple and effective method for validation and measurement of collimator output factors for Leksell Gamma Knife Perfexion. Phys Med Biol. 2009 Jun 21; 54(12):3897-907. PMID: 19491451.
      View in: PubMed
    41. Zhang Y, Hu Y, Ma L, Dai J. Dynamic delivery of IMRT using an independent collimator: a model study. Phys Med Biol. 2009 Apr 21; 54(8):2527-39. PMID: 19336843.
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    42. Luan S, Swanson N, Chen Z, Ma L. Dynamic gamma knife radiosurgery. Phys Med Biol. 2009 Mar 21; 54(6):1579-91. PMID: 19229095.
      View in: PubMed
    43. Sahgal A, Ames C, Chou D, Ma L, Huang K, Xu W, Chin C, Weinberg V, Chuang C, Weinstein P, Larson DA. Stereotactic body radiotherapy is effective salvage therapy for patients with prior radiation of spinal metastases. Int J Radiat Oncol Biol Phys. 2009 Jul 01; 74(3):723-31. PMID: 19095374.
      View in: PubMed
    44. Ma L, Verhey L, Chuang C, Descovich M, Smith V, Huang K, McDermott M, Sneed P. Effect of composite sector collimation on average dose fall-off for Gamma Knife Perfexion. J Neurosurg. 2008 Dec; 109 Suppl:15-20. PMID: 19123883.
      View in: PubMed
    45. Ma L, Chuang C, Descovich M, Petti P, Smith V, Verhey L. Whole-procedure clinical accuracy of gamma knife treatments of large lesions. Med Phys. 2008 Nov; 35(11):5110-4. PMID: 19070245.
      View in: PubMed
    46. Hossain S, Xia P, Chuang C, Verhey L, Gottschalk AR, Mu G, Ma L. Simulated real time image guided intrafraction tracking-delivery for hypofractionated prostate IMRT. Med Phys. 2008 Sep; 35(9):4041-8. PMID: 18841856.
      View in: PubMed
    47. Xie Y, Djajaputra D, King CR, Hossain S, Ma L, Xing L. Intrafractional motion of the prostate during hypofractionated radiotherapy. Int J Radiat Oncol Biol Phys. 2008 Sep 01; 72(1):236-46. PMID: 18722274; PMCID: PMC2725181.
    48. Sahgal A, Chuang C, Larson D, Huang K, Petti P, Weinstein P, Ma L. Split-volume treatment planning of multiple consecutive vertebral body metastases for cyberknife image-guided robotic radiosurgery. Med Dosim. 2008; 33(3):175-9. PMID: 18674681.
      View in: PubMed
    49. Chuang C, Sahgal A, Lee L, Larson D, Huang K, Petti P, Verhey L, Ma L. Effects of residual target motion for image-tracked spine radiosurgery. Med Phys. 2007 Nov; 34(11):4484-90. PMID: 18072513.
      View in: PubMed
    50. Ma L, Larson D, Petti P, Chuang C, Verhey L. Boosting central target dose by optimizing embedded dose hot spots for gamma knife radiosurgery. Stereotact Funct Neurosurg. 2007; 85(6):259-63. PMID: 17709977.
      View in: PubMed
    51. Sun M, Ma L. Treatments of exceptionally large prostate cancer patients with low-energy intensity-modulated photons. J Appl Clin Med Phys. 2006 Nov 28; 7(4):43-9. PMID: 17533352.
      View in: PubMed
    52. Ma L, Kwok Y, Chin LS, Simard JM, Regine WF. Concomitant GRID boost for Gamma Knife radiosurgery. Med Phys. 2005 Nov; 32(11):3419-23. PMID: 16370428.
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    53. Li K, Ma L. A constrained tracking algorithm to optimize plug patterns in multiple isocenter gamma knife radiosurgery planning. Med Phys. 2005 Oct; 32(10):3132-5. PMID: 16279066.
      View in: PubMed
    54. Guerrero M, Li XA, Ma L, Linder J, Deyoung C, Erickson B. Simultaneous integrated intensity-modulated radiotherapy boost for locally advanced gynecological cancer: radiobiological and dosimetric considerations. Int J Radiat Oncol Biol Phys. 2005 Jul 01; 62(3):933-9. PMID: 15936580.
      View in: PubMed
    55. Ma L. Dosimetric properties of magnetically collimated electron beams for radiation therapy. Med Phys. 2004 Nov; 31(11):2973-7. PMID: 15587649.
      View in: PubMed
    56. Li K, Ma L. Selective source blocking for Gamma Knife radiosurgery of trigeminal neuralgia based on analytical dose modelling. Phys Med Biol. 2004 Aug 07; 49(15):3455-63. PMID: 15379025.
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    57. Li K, Yu CX, Ma L. Improving a scissor-action couch for conformal arc radiotherapy and radiosurgery. J Appl Clin Med Phys. 2004; 5(3):62-5. PMID: 15753940.
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    58. Li K, Dai J, Ma L. Simultaneous minimizing monitor units and number of segments without leaf end abutment for segmental intensity modulated radiation therapy delivery. Med Phys. 2004 Mar; 31(3):507-12. PMID: 15070247.
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    59. Phaisangittisakul N, D'Souza WD, Ma L. Magnetic collimation and metal foil filtering for electron range and fluence modulation. Med Phys. 2004 Jan; 31(1):17-23. PMID: 14761016.
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    60. Ma L, Phaisangittisakul N, Yu CX, Sarfaraz M. A quality assurance method for analyzing and verifying intensity modulated fields. Med Phys. 2003 Aug; 30(8):2082-8. PMID: 12945974.
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    61. Ma L, Chin LS, DiBiase SJ, Gullapalli R, Kennedy A, Simard JM, Slawson R. Concomitant boost of stratified target area with gamma knife radiosurgery: a treatment planning study. Am J Clin Oncol. 2003 Aug; 26(4):e100-5. PMID: 12902906.
      View in: PubMed
    62. Guerrero M, Li XA, Ma L. A technique to sharpen the beam penumbra for Gamma Knife radiosurgery. Phys Med Biol. 2003 Jun 21; 48(12):1843-53. PMID: 12870587.
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    63. Ma L. Smoothing intensity-modulated treatment delivery under hardware constraints. Med Phys. 2002 Dec; 29(12):2937-45. PMID: 12512730.
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    64. Phaisangittisakul N, Ma L. An empirical model for independent dose verification of the Gamma Knife treatment planning. Med Phys. 2002 Sep; 29(9):1991-7. PMID: 12349920.
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    65. Yu CX, Li XA, Ma L, Chen D, Naqvi S, Shepard D, Sarfaraz M, Holmes TW, Suntharalingam M, Mansfield CM. Clinical implementation of intensity-modulated arc therapy. Int J Radiat Oncol Biol Phys. 2002 Jun 01; 53(2):453-63. PMID: 12023150.
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    66. DiBiase SJ, Chin LS, Ma L. Influence of gamma knife radiosurgery on the quality of life in patients with brain metastases. Am J Clin Oncol. 2002 Apr; 25(2):131-4. PMID: 11943889.
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    67. Ma L, Yu CX, Earl M, Holmes T, Sarfaraz M, Li XA, Shepard D, Amin P, DiBiase S, Suntharalingam M, Mansfield C. Optimized intensity-modulated arc therapy for prostate cancer treatment. Int J Cancer. 2001 Dec 20; 96(6):379-84. PMID: 11745509.
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    68. Ma L. Dependence of normal brain integral dose and normal tissue complication probability on the prescription isodose values for gamma-knife radiosurgery. Phys Med Biol. 2001 Nov; 46(11):3031-41. PMID: 11720361.
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    69. Li XA, Ma L, Naqvi S, Shih R, Yu C. Monte Carlo dose verification for intensity-modulated arc therapy. Phys Med Biol. 2001 Sep; 46(9):2269-82. PMID: 11580168.
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    70. Chin LS, Ma L, DiBiase S. Radiation necrosis following gamma knife surgery: a case-controlled comparison of treatment parameters and long-term clinical follow up. J Neurosurg. 2001 Jun; 94(6):899-904. PMID: 11409517.
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    71. Shepard DM, Ferris MC, Ove R, Ma L. Inverse treatment planning for Gamma Knife radiosurgery. Med Phys. 2000 Dec; 27(12):2748-56. PMID: 11190958.
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    72. Ma CM, Pawlicki T, Jiang SB, Li JS, Deng J, Mok E, Kapur A, Xing L, Ma L, Boyer AL. Monte Carlo verification of IMRT dose distributions from a commercial treatment planning optimization system. Phys Med Biol. 2000 Sep; 45(9):2483-95. PMID: 11008950.
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    73. Xing L, Lin Z, Donaldson SS, Le QT, Tate D, Goffinet DR, Wolden S, Ma L, Boyer AL. Dosimetric effects of patient displacement and collimator and gantry angle misalignment on intensity modulated radiation therapy. Radiother Oncol. 2000 Jul; 56(1):97-108. PMID: 10869760.
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    74. Ma L, Yu C, Sarfaraz M. A dosimetric leaf-setting strategy for shaping radiation fields using a multileaf collimator. Med Phys. 2000 May; 27(5):972-7. PMID: 10841399.
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    75. Ma L, Chin LS, Shepard D, Amin P, Slawson R. The effect of user-defined variables on dosimetry consistency in Gamma Knife planning. Phys Med Biol. 2000 May; 45(5):N43-47. PMID: 10843114.
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    76. Ma L, Li XA, Yu CX. An efficient method of measuring the 4 mm helmet output factor for the Gamma knife. Phys Med Biol. 2000 Mar; 45(3):729-33. PMID: 10730967.
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    77. Ma L, Chin L, Sarfaraz M, Shepard D, Yu C. An investigation of eye lens dose for gamma knife treatments of trigeminal neuralgia. J Appl Clin Med Phys. 2000; 1(4):116-9. PMID: 11674826.
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    78. Ma L, Xia P, Verhey LJ, Boyer AL. A dosimetric comparison of fan-beam intensity modulated radiotherapy with Gamma Knife stereotactic radiosurgery for treating intermediate intracranial lesions. Int J Radiat Oncol Biol Phys. 1999 Dec 01; 45(5):1325-30. PMID: 10613329.
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    79. Ma L, Boyer AL, Ma L, Xing L. Synchronizing dynamic multileaf collimators for producing two-dimensional intensity-modulated fields with minimum beam delivery time. Int J Radiat Oncol Biol Phys. 1999 Jul 15; 44(5):1147-54. PMID: 10421549.
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    80. Xing L, Curran B, Hill R, Holmes T, Ma L, Forster KM, Boyer AL. Dosimetric verification of a commercial inverse treatment planning system. Phys Med Biol. 1999 Feb; 44(2):463-78. PMID: 10070795.
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    81. Ma L, Boyer AL, Findley DO, Geis PB, Mok E. Application of a video-optical beam imaging system for quality assurance of medical accelerators. Phys Med Biol. 1998 Dec; 43(12):3649-59. PMID: 9869039.
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    82. Ma L, Boyer AL, Xing L, Ma L. An optimized leaf-setting algorithm for beam intensity modulation using dynamic multileaf collimators. Phys Med Biol. 1998 Jun; 43(6):1629-43. PMID: 9651030.
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    83. Ma L, Chang W, Lau-Chin M, Tate EM, Boyer AL. Using static MLC fields to replace partial transmission cerrobend blocks in treatment planning of rectal carcinoma cases. Med Dosim. 1998; 23(4):264-6. PMID: 9863723.
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    84. Ma L, Geis PB, Boyer AL. Quality assurance for dynamic multileaf collimator modulated fields using a fast beam imaging system. Med Phys. 1997 Aug; 24(8):1213-20. PMID: 9284242.
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