Photon-beam subsource sensitivity to the initial electron-beam parameters

Medical Physics

Volumn 32, Issue 4, 2005, Pages 1164-1175

  Fix, Michael K ^a   Keall, Paul J ^a   Siebers, Jeffrey V ^a  

^a VIRGINIA COMMONWEALTH UNIVERSITY   (United States)

Author keywords

Beam characteristics; Monte carlo simulation; Photon beam

Indexed keywords

DISSOCIATION; ELECTRON BEAMS; ELECTRON ENERGY LEVELS; NORMAL DISTRIBUTION; PHASE SPACE METHODS; PHOTOELECTRONS; PHOTONS;

BEAM CHARACTERISTICS; DISTRIBUTION SHAPES; ELECTRON-BEAM PARAMETERS; PHOTON BEAMS; PRIMARY COLLIMATOR; RADIAL DISTRIBUTIONS; RADIAL INTENSITY DISTRIBUTION; RELATIVE INTENSITY;

MONTE CARLO METHODS;

ALGORITHM; ARTICLE; COLLIMATOR; DOSIMETRY; ELECTRON BEAM; ENERGY; FILTER; MONTE CARLO METHOD; PHOTON; PRIORITY JOURNAL; RADIATION DOSE DISTRIBUTION; RADIOTHERAPY;

EID: 17844366342     PISSN: 00942405     EISSN: None     Source Type: Journal    
DOI: 10.1118/1.1884385     Document Type: Article

References (35)

1. R. Mohan, C. Chui, and L. Lidofsky, "Energy and angular distributions of photons from medical linear accelerators," Med. Phys. 12, 592-590 (1985).
2. E. L. Chaney, T. J. Cullip, and T. A. Gabriel, "A Monte Carlo study of accelerator head scatter," Med. Phys. 21, 1383-1390 (1994).
3. D. M. Lovelock, C. S. Chui, and R. Mohan, "A Monte Carlo model of photon beams used in radiation therapy," Med. Phys. 22, 1387-1394 (1995).
4. D. W. Rogers, B. A. Faddegon, G. X. Ding, C. M. Ma, J. We, and T. R. Mackie, "BEAM: A Monte Carlo code to simulate radiotherapy treatment units," Med. Phys. 22, 503-524 (1995).
5. H. H. Liu, T. R. Mackie, and E. C. McCullough, "A dual source photon beam model used in convolution/superposition dose calculations for clinical megavoltage x-ray beams," Med. Phys. 24, 1960-1974 (1997).
6. B. Libby, J. Siebers, and R. Mohan, "Validation of Monte Carlo generated phase-space descriptions of medical linear accelerators," Med. Phys. 26, 1476-1483 (1999).
7. C. M. Ma, E. Mok, A. Kapur, T. Pawlicki, D. Findley, S. Brain, K. Forster, and A. L. Boyer, "Clinical implementation of a Monte Carlo treatment planning system," Med. Phys. 26, 2133-2143 (1999).
8. A. E. Schach von Wittenau, L. J. Cox, P. M. Bergstrom, Jr., W. P. Chandler, C. L. Hartmann Siantar, and R. Mohan, "Correlated histogram representation of Monte Carlo derived medical accelerator photon-output phase space," Med. Phys. 26, 1196-2110 (1999).
9. J. V. Siebers, P. J. Keall, B. Libby, and R. Mohan, "Comparison of EGS4 and MCNP4b Monte Carlo codes for generation of photon phase space distributions for a Varian 2100C," Phys. Med. Biol. 44, 3009-3026 (1999).
10. I. Chetty, J. J. DeMarco, and T. D. Solberg, "A virtual source model for Monte Carlo modeling of arbitrary intensity distributions," Med. Phys. 27, 166-172 (2000).
11. J. Deng, S. B. Jiang, A. Kapur, J. Li, T. Pawlicki, and C. M. Ma, "Photon beam characterization and modelling for Monte Carlo treatment planning," Phys. Med. Biol. 45, 411-427 (2000).
12. W. van der Zee and J. Welleweerd, "Calculating photon beam characteristics with Monte Carlo techniques," Med. Phys. 26, 1883-1892 (1999).
13. C. M. Ma, "Characterization of computer simulated radiotherapy beams for Monte-Carlo treatment planning," Radiat. Phys. Chem. 53, 329-344 (1998).
14. M. K. Fix, H. Keller, P. Ruegsegger, and E. J. Born, "Simple beam models for Monte Carlo photon beam dose calculations in radiotherapy," Med. Phys. 27, 2739-2747 (2000).
15. M. K. Fix, M. Stampanoni, P. Manser, E. J. Born, R. Mini, and P. Ruegsegger, "A multiple source model for 6 MV photon beam dose calculations using Monte Carlo," Phys. Med. Biol. 46, 1407-1427 (2001).
16. M. K. Fix, P. Manser, E. J. Born, R. Mini, and P. Ruegsegger, "Monte Carlo simulation of a dynamic MLC based on a multiple source model," Phys. Med. Biol. 46, 3241-3257 (2001).
17. M. K. Fix, P. J. Keall, K. Dawson, and J. V. Siebers, "Monte Carlo source model for photon beam radiotherapy: Photon source characteristics," Med. Phys. 31, 3106-3121 (2004).
18. A. E. Schach von Wittenau, P. M. Bergstrom, Jr., and L. J. Cox, "Patient-dependent beam-modifier physics in Monte Carlo photon dose calculations," Med. Phys. 27, 935-947 (2000).
19. C. L. Hartmann Siantar, R. S. Walling, T. P. Daly, B. Faddegon, N. Albright, P. Bergstrom, A. F. Bielajew, C. Chuang, D. Garrett, R. K. House, D. Knapp, D. J. Wieczorek, and L. J. Verhey, "Description and dosimetric verification of the PEREGRINE Monte Carlo dose calculation system for photon beams incident on a water phantom," Med. Phys. 28, 1322-1337 (2001).
20. P. Francescon, C. Cavedon, S. Reccanello, and S. Cora, "Photon dose calculation of a three-dimensional treatment planning system compared to the Monte Carlo code BEAM," Med. Phys. 27, 1579-1587 (2000).
21. G. X. Ding, "Energy spectra, angular spread, fluence profiles and dose distributions of 6 and 18 MV photon beams: Results of Monte Carlo simulations for a Varian 2100EX accelerator," Phys. Med. Biol. 47, 1025-1046 (2002).
22. D. Sheikh-Bagheri and D. W. Rogers, "Monte Carlo calculation of nine megavoltage photon beam spectra using the BEAM code," Med. Phys. 29, 391-402 (2002).
23. D. Sheikh-Bagheri and D. W. Rogers, "Sensitivity of megavoltage photon beam Monte Carlo simulations to electron beam and other parameters," Med. Phys. 29, 379-390 (2002).
24. P. J. Keall, J. V. Siebers, B. Libby, and R. Mohan, "Determining the incident electron fluence for Monte Carlo-based photon treatment planning using a standard measured data set," Med. Phys. 30, 574-582 (2003).
25. R. D. Lewis, S. J. Ryde, D. A. Hancock, and C. J. Evans, "An MCNP-based model of a linear accelerator x-ray beam," Phys. Med. Biol. 44, 1219-1230 (1999).
26. B. T. Sichani and M. Sohrabpour, "Monte Carlo dose calculations for radiotherapy machines: Theratron 780-C teletherapy case study," Phys. Med. Biol. 49, 807-818 (2004).
27. J. Van Dyk, R. B. Barnett, J. E. Cygler, and P. C. Shragge, "Commissioning and quality assurance of treatment planning computers," Int. J. Radiat. Oncol., Biol., Phys. 26, 261-273 (1993).
28. F. Verhaegen and J. Seuntjens, "Monte Carlo modelling of external radiotherapy photon beams," Phys. Med. Biol. 48, R107-164 (2003).
29. S. B. Jiang, A. L. Boyer, and C. M. Ma, "Modeling the extrafocal radiation and monitor chamber backscatter for photon beam dose calculation," Med. Phys. 28, 55-66 (2001).
30. M. Fippel, F. Haryanto, O. Dohm, F. Nusslin, and S. Kriesen, "A virtual photon energy fluence model for Monte Carlo dose calculation," Med. Phys. 30, 301-311 (2003).
31. E. Spezi, D. G. Lewis, and C. W. Smith, "Monte Carlo simulation and dosimetric verification of radiotherapy beam modifiers," Phys. Med. Biol. 46, 3007-3029 (2001).
32. J. O. Kim, J. V. Siebers, P. J. Keall, M. R. Arnfield, and R. Mohan, "A Monte Carlo study of radiation transport through multileaf collimators," Med. Phys. 28, 2497-2506 (2001).
33. A. Tzedakis, J. E. Damilakis, M. Mazonakis, J. Stratakis, H. Varveris, and N. Gourtsoyiannis, "Influence of initial electron beam parameters on Monte Carlo calculated absorbed dose distributions for radiotherapy photon beams," Med. Phys. 31, 907-913 (2004).
34. I. Kawrakow, D. W. Rogers, and B. R. Walters, "Large efficiency improvements in BEAMnrc using directional bremsstrahlung splitting," Med. Phys. 31, 2883-2898 (2004).
35. B. A. Faddegon, P. O'Brien, and D. L. Mason, "The flatness of Siemens linear accelerator x-ray fields," Med. Phys. 26, 220-228 (1999).