TitleAssociate Professor
InstitutionMD Anderson
DepartmentRadiation Physics
Address1400 Pressler St
Houston TX 77030-4008
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Vassiliev ON. Accumulation of sublethal radiation damage and its effect on cell survival. Phys Med Biol. 2022 12 19; 68(1). PMID: 36533628; PMCID: PMC9855632.
      Citations: 1     Fields:    
    2. Vassiliev ON. On calculation of the average linear energy transfer for radiobiological modelling. Biomed Phys Eng Express. 2021 01; 7(1). PMID: 33692907; PMCID: PMC7939035.
      Citations:    Fields:    Translation:Cells
    3. Vassiliev ON, Peterson CB, Chang JY, Mohan R. Monte Carlo evaluation of target dose coverage in lung stereotactic body radiation therapy with flattening filter-free beams. J Radiother Pract. 2022 Mar; 21(1):81-87. PMID: 35401050; PMCID: PMC8992779.
    4. Vassiliev ON, Peterson CB, Chang JY, Mohan R. Using FFF Beams to Improve the Therapeutic Ratio of Lung SBRT. J Radiother Pract. 2021 Dec; 20(4):419-425. PMID: 35330584; PMCID: PMC8939879.
      Citations: 1     
    5. Vassiliev ON, Peterson CB, Grosshans DR, Mohan R. A simple model for calculating relative biological effectiveness of X-rays and gamma radiation in cell survival. Br J Radiol. 2020 Aug; 93(1112):20190949. PMID: 32464080; PMCID: PMC7446005.
      Citations: 1     Fields:    Translation:HumansAnimalsCells
    6. Kry SF, Feygelman V, Balter P, Charlie Ma CM, Snyder M, Tonner B, Vassiliev ON, Kn??s T. AAPM Task Group 329: Reference dose specification for dose calculations: Dose-to-water or dose-to-muscle? Med Phys. 2020 Mar; 47(3):e52-e64. PMID: 31883390.
      Citations: 8     Fields:    Translation:Humans
    7. Chetvertkov MA, Vassiliev ON, Yang J, Wang HC, Liu AY, Liao Z, Mohan R. Impact of Intra-Fractional Motion on Dose Distributions in Lung IMRT. J Radiother Pract. 2021 Mar; 20(1):12-16. PMID: 34168519; PMCID: PMC8218928.
    8. Vassiliev ON, Peterson CB, Cao W, Grosshans DR, Mohan R. Systematic microdosimetric data for protons of therapeutic energies calculated with Geant4-DNA. Phys Med Biol. 2019 11 04; 64(21):215018. PMID: 31553958; PMCID: PMC7232815.
      Citations: 1     Fields:    
    9. Vassiliev ON, Kry SF, Wang HC, Peterson CB, Chang JY, Mohan R. Radiotherapy of lung cancers: FFF beams improve dose coverage at tumor periphery compromised by electronic disequilibrium. Phys Med Biol. 2018 09 28; 63(19):195007. PMID: 30189421; PMCID: PMC6192016.
      Citations: 7     Fields:    Translation:Humans
    10. Vassiliev ON, Kry SF, Grosshans DR, Mohan R. Average stopping powers for electron and photon sources for radiobiological modeling and microdosimetric applications. Phys Med Biol. 2018 03 02; 63(5):055007. PMID: 29411712; PMCID: PMC5856245.
      Citations: 2     Fields:    Translation:Humans
    11. Vassiliev ON, Grosshans DR, Mohan R. A new formalism for modelling parameters a and ? of the linear-quadratic model of cell survival for hadron therapy. Phys Med Biol. 2017 Oct 03; 62(20):8041-8059. PMID: 28832343; PMCID: PMC5737022.
      Citations: 4     Fields:    Translation:HumansCells
    12. Wang H, Vassiliev ON. Radial dose distributions from carbon ions of therapeutic energies calculated with Geant4-DNA. Phys Med Biol. 2017 05 21; 62(10):N219-N227. PMID: 28362271.
      Citations: 1     Fields:    
    13. Newhauser WD, Zhang R, Jones TG, Giebeler A, Taddei PJ, Stewart RD, Lee A, Vassiliev O. Reducing the cost of proton radiation therapy: the feasibility of a streamlined treatment technique for prostate cancer. Cancers (Basel). 2015 Apr 24; 7(2):688-705. PMID: 25920039; PMCID: PMC4491679.
      Citations: 3     
    14. Wang H, Vassiliev ON. Radial dose distributions from protons of therapeutic energies calculated with Geant4-DNA. Phys Med Biol. 2014 Jul 21; 59(14):3657-68. PMID: 24925886.
      Citations: 4     Fields:    Translation:Cells
    15. Wang X, Yang JN, Li X, Tailor R, Vassilliev O, Brown P, Rhines L, Chang E. Effect of spine hardware on small spinal stereotactic radiosurgery dosimetry. Phys Med Biol. 2013 Oct 07; 58(19):6733-47. PMID: 24018829.
      Citations: 9     Fields:    Translation:Humans
    16. Vassiliev ON. Electron slowing-down spectra in water for electron and photon sources calculated with the Geant4-DNA code. Phys Med Biol. 2012 Feb 21; 57(4):1087-94. PMID: 22297165.
      Citations: 4     Fields:    
    17. Vassiliev ON. Formulation of the multi-hit model with a non-Poisson distribution of hits. Int J Radiat Oncol Biol Phys. 2012 Jul 15; 83(4):1311-6. PMID: 22245202.
      Citations: 7     Fields:    
    18. Vassiliev ON, Kudchadker RJ, Kuban DA, Frank SJ, Choi S, Nguyen Q, Lee AK. Dosimetric impact of fiducial markers in patients undergoing photon beam radiation therapy. Phys Med. 2012 Jul; 28(3):240-4. PMID: 21875820.
      Citations: 3     Fields:    Translation:Humans
    19. Vassiliev ON, Kudchadker RJ, Swanson DA, Bruno TL, van Vulpen M, Frank SJ. Displacement of periurethral stranded seeds and its dosimetric consequences in prostate brachytherapy. Brachytherapy. 2011 Sep-Oct; 10(5):401-8. PMID: 21306959.
      Citations: 4     Fields:    Translation:Humans
    20. Kry SF, Vassiliev ON, Mohan R. Out-of-field photon dose following removal of the flattening filter from a medical accelerator. Phys Med Biol. 2010 Apr 21; 55(8):2155-66. PMID: 20305334.
      Citations: 33     Fields:    Translation:Humans
    21. Vassiliev ON, Wareing TA, McGhee J, Failla G, Salehpour MR, Mourtada F. Validation of a new grid-based Boltzmann equation solver for dose calculation in radiotherapy with photon beams. Phys Med Biol. 2010 Feb 07; 55(3):581-98. PMID: 20057008.
      Citations: 88     Fields:    Translation:Humans
    22. Kry SF, Howell RM, Polf J, Mohan R, Vassiliev ON. Treatment vault shielding for a flattening filter-free medical linear accelerator. Phys Med Biol. 2009 Mar 07; 54(5):1265-73. PMID: 19190359.
      Citations: 5     Fields:    Translation:Humans
    23. Vassiliev ON, Kry SF, Chang JY, Balter PA, Titt U, Mohan R. Stereotactic radiotherapy for lung cancer using a flattening filter free Clinac. J Appl Clin Med Phys. 2009 Jan 27; 10(1):14-21. PMID: 19223837; PMCID: PMC5720505.
      Citations: 35     Fields:    Translation:Humans
    24. Vassiliev ON, Wareing TA, Davis IM, McGhee J, Barnett D, Horton JL, Gifford K, Failla G, Titt U, Mourtada F. Feasibility of a multigroup deterministic solution method for three-dimensional radiotherapy dose calculations. Int J Radiat Oncol Biol Phys. 2008 Sep 01; 72(1):220-7. PMID: 18722273; PMCID: PMC2597668.
      Citations: 16     Fields:    Translation:Humans
    25. Kry SF, Howell RM, Titt U, Salehpour M, Mohan R, Vassiliev ON. Energy spectra, sources, and shielding considerations for neutrons generated by a flattening filter-free Clinac. Med Phys. 2008 May; 35(5):1906-11. PMID: 18561666.
      Citations: 13     Fields:    Translation:Humans
    26. Titt U, Zheng Y, Vassiliev ON, Newhauser WD. Monte Carlo investigation of collimator scatter of proton-therapy beams produced using the passive scattering method. Phys Med Biol. 2008 Jan 21; 53(2):487-504. PMID: 18185001.
      Citations: 28     Fields:    Translation:HumansPHPublic Health
    27. Kry SF, Titt U, Followill D, Vassiliev ON, White RA, Stovall M, Salehpour M, P?nisch F. A Monte Carlo model for out-of-field dose calculation from high-energy photon therapy. Med Phys. 2007 Sep; 34(9):3489-99. PMID: 17926952.
      Citations: 21     Fields:    Translation:Humans
    28. Vassiliev ON, Titt U, Kry SF, Mohan R, Gillin MT. Radiation safety survey on a flattening filter-free medical accelerator. Radiat Prot Dosimetry. 2007; 124(2):187-90. PMID: 17681966.
      Citations: 5     Fields:    Translation:CellsPHPublic Health
    29. Kry SF, Titt U, Vassiliev ON, Salehpour M, Gillin M, Mohan R, P?nisch F. Reduced neutron production through use of a flattening-filter-free accelerator. Int J Radiat Oncol Biol Phys. 2007 Jul 15; 68(4):1260-4. PMID: 17637397.
      Citations: 23     Fields:    Translation:HumansCellsPHPublic Health
    30. Vassiliev ON, Kry SF, Kuban DA, Salehpour M, Mohan R, Titt U. Treatment-planning study of prostate cancer intensity-modulated radiotherapy with a Varian Clinac operated without a flattening filter. Int J Radiat Oncol Biol Phys. 2007 Aug 01; 68(5):1567-71. PMID: 17544596.
      Citations: 13     Fields:    Translation:HumansCells
    31. Cho SH, Vassiliev ON, Horton JL. Comparison between an event-by-event Monte Carlo code, NOREC, and ETRAN for electron scaled point kernels between 20 keV and 1 MeV. Radiat Environ Biophys. 2007 Mar; 46(1):77-83. PMID: 17219152.
      Citations:    Fields:    
    32. Jang SY, Liu HH, Wang X, Vassiliev ON, Siebers JV, Dong L, Mohan R. Dosimetric verification for intensity-modulated radiotherapy of thoracic cancers using experimental and Monte Carlo approaches. Int J Radiat Oncol Biol Phys. 2006 Nov 01; 66(3):939-48. PMID: 17011466.
      Citations: 4     Fields:    
    33. Kry SF, Titt U, Followill D, Vassiliev ON, White RA, Mohan R, Salehpour M, P?nisch F. A Monte Carlo model for calculating out-of-field dose from a varian 6 MV beam. Med Phys. 2006 Nov; 33(11):4405-13. PMID: 17153419.
      Citations: 30     Fields:    
    34. Titt U, Vassiliev ON, Kry SF, Mohan R, P?nisch F. Monte Carlo study of backscatter in a flattening filter free clinical accelerator. Med Phys. 2006 Sep; 33(9):3270-3. PMID: 17022221.
      Citations: 11     Fields:    Translation:HumansCells
    35. Titt U, Vassiliev ON, Dong L, Liu H, Mohan R, P?nisch F. A flattening filter free photon treatment concept evaluation with Monte Carlo. Med Phys. 2006 Jun; 33(6):1595-602. PMID: 16872067.
      Citations: 31     Fields:    
    36. Titt U, Vassiliev ON, Kry SF, Mohan R, P?nisch F. Properties of unflattened photon beams shaped by a multileaf collimator. Med Phys. 2006 Jun; 33(6):1738-46. PMID: 16872081.
      Citations: 51     Fields:    Translation:HumansCells
    37. Vassiliev ON, Titt U, Kry SF, Gillin MT, Mohan R, P?nisch F. Monte Carlo study of photon fields from a flattening filter-free clinical accelerator. Med Phys. 2006 Apr; 33(4):820-7. PMID: 16696457.
      Citations: 36     Fields:    Translation:Cells
    38. Vassiliev ON, Titt U, Kry SF, Mohan R, Gillin MT, P?nisch F. Dosimetric properties of photon beams from a flattening filter free clinical accelerator. Phys Med Biol. 2006 Apr 07; 51(7):1907-17. PMID: 16552113.
      Citations: 67     Fields:    
    39. Jang SY, Vassiliev ON, Liu HH, Mohan R, Siebers JV. Development and commissioning of a multileaf collimator model in monte carlo dose calculations for intensity-modulated radiation therapy. Med Phys. 2006 Mar; 33(3):770-81. PMID: 16878579.
      Citations: 9     Fields:    Translation:Humans
    40. Titt U, Kry SF, Vassiliev ON, Mohan R, P?nisch F. MCNPX simulation of a multileaf collimator. Med Phys. 2006 Feb; 33(2):402-4. PMID: 16532947.
      Citations: 4     Fields:    Translation:HumansPHPublic Health
    41. Beddar AS, Briere TM, Mourtada FA, Vassiliev ON, Liu HH, Mohan R. Monte Carlo calculations of the absorbed dose and energy dependence of plastic scintillators. Med Phys. 2005 May; 32(5):1265-9. PMID: 15984678.
      Citations: 5     Fields:    Translation:Cells
    42. Cho SH, Vassiliev ON, Lee S, Liu HH, Ibbott GS, Mohan R. Reference photon dosimetry data and reference phase space data for the 6 MV photon beam from varian clinac 2100 series linear accelerators. Med Phys. 2005 Jan; 32(1):137-48. PMID: 15719964.
      Citations: 22     Fields:    
    43. Reducing the cost of proton radiation therapy. Cancers. 7:688-705.
    44. Quantum Monte-Carlo study of phase transitions in Heisenberg chains with long-range interactions. Journal of Magnetism and Magnetic Materials. 226-230:588-589.
    45. Using symmetry properties to modify estimates in calculations of radiation fields by the Monte Carlo method. Soviet Atomic Energy. 60:347-350.
    46. Monte Carlo phase diagram for diblock copolymer melts. Journal of Chemical Physics. 124.
    47. Calculation of microdosimetric characteristics in electron and gamma-ray irradiated water. Soviet Physics Journal. 31:149-153.
    48. Fluctuations of the energy absorption of electron-photon radiation in a model with collision-grouping elements. Soviet Physics Journal. 30:800-804.
    49. Fluctuation effects in block copolymer melts. Journal of Chemical Physics. 118:7700-7713.
    50. Effects of radiation spectra on radiation-effect yields, relative biological effectiveness, and quality coefficients. Soviet Atomic Energy. 70:48-55.
    51. Quantum Monte Carlo study of a Heisenberg spin system in two dimensions with long-range interactions. Journal of Applied Physics. 89:7329-7331.
    52. Quantum Monte-Carlo study of the Heisenberg chain with long-range ferromagnetic interactions. Physica A: Statistical Mechanics and its Applications. 294:139-154.
    53. A model of the radiation-induced bystander effect based on an analogy with ferromagnets. Application to modelling tissue response in a uniform field. Physica A: Statistical Mechanics and its Applications. 416:242-251.
    54. The influence of short tracks on the biological effectiveness of radiations. Radiation Protection Dosimetry. 62:179-182.
    55. Optically nonlinear s-polarized electromagnetic waves in multilayered symmetric dielectrics. Surface Review and Letters. 7:89-102.
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