Multisource modeling of flattening filter free (FFF) beam and the optimization of model parameters

Medical Physics

Volumn 38, Issue 4, 2011, Pages 1931-1942

  Cho, Woong ^a   Kielar, Kayla N ^b   Mok, Ed ^b   Xing, Lei ^b   Park, Jeong Hoon ^a   Jung, Won Gyun ^a   Suh, Tae Suk ^a  

^a The Catholic University of Korea   (South Korea)

^b STANFORD UNIVERSITY   (United States)

Author keywords

beam source model; flattening filter free beam; head scatter; optimization; TrueBeam

Indexed keywords

LINEAR ACCELERATORS; NEUTRON EMISSION; ONCOLOGY; PHOTONS;

BEAM SOURCES; COMMISSIONING PROCESS; CURRENT TREATMENTS; DOSE DISTRIBUTIONS; FLATTENING FILTER FREE; OPTIMIZATION TECHNIQUES; RADIATION ONCOLOGY; TRUEBEAM;

OPTIMIZATION;

EID: 79953653358     PISSN: 00942405     EISSN: None     Source Type: Journal    
DOI: 10.1118/1.3560426     Document Type: Article

References (32)

1. Y. Yang, L. Xing, A. L. Boyer, Y. Song, and Y. Hu, "A three-source model for the calculation of head scatter factors," Med. Phys. 29, 2024-2033 (2002).
2. O. N. Vassiliev, U. Titt, F. Pönisch, S. F. Kry, R. Mohan, and M. T. Gillin, "Dosimetric properties of photon beams from a flattening filter free clinical accelerator," Phys. Med. Biol. 51, 1907-1917 (2006).
3. R. Jeraj, T. R. Mackie, J. Balog, G. Olivera, D. Pearson, J. Kapatoes, K. Ruchala, and P. Reckwerdt, "Radiation characteristics of helical tomotherapy," Med. Phys. 31, 396-404 (2004).
4. T.-H. Kim, L. Zhu, T.-S. Suh, and L. Xing, "IMRT inverse planning optimization with non-uniform beams by using total-variation regularization (TVR)," Med. Phys. 37, 57-66 (2010).
5. U. Titt, O. N. Vassiliev, F. Pönisch, L. Dong, H. Liu, and R. Mohan, "A flattening filter free photon treatment concept evaluation with Monte Carlo," Med. Phys. 33, 1595-1602 (2006).
6. F. Pönisch, U. Titt, O. N. Vassiliev, S. F. Kry, and R. Mohan, "Properties of unflattened photon beams shaped by a multileaf collimator," Med. Phys. 33, 1738-1746 (2006).
7. O. N. Vassiliev, U. Titt, S. F. Kry, F. Pönisch, M. T. Gillin, and R. Mohan, "Monte Carlo study of photon fields from a flattening filter-free clinical accelerator," Med. Phys. 33, 820-827 (2006).
8. M. Sikora, O. Dohm, and M. Alber, "A virtual photon source model of an Elekta linear accelerator with integrated mini MLC for Monte Carlo based IMRT dose calculation," Phys. Med. Biol. 52, 4449-4463 (2007).
9. J. Cashmore, "The characterization of unflattened photon beams from a 6 MV linear accelerator," Phys. Med. Biol. 53, 1933-1946 (2008).
10. D. Sawkey and B. A. Faddegon, "Simulation of large x-ray fields using independently measured source and geometry details," Med. Phys. 36, 5622-5632 (2009).
11. W. Fu, J. Dai, Y. Hu, D. Han, and Y. Song, "Delivery time comparison for intensity-modulated radiation therapy with/without flattening filter: A planning study," Phys. Med. Biol. 49, 1535-1547 (2004).
12. M. B. Sharpe, D. A. Jaffray, J. J. Battista, and P. Munro, "Extrafocal radiation: A unified approach to the prediction of beam penumbra and output factors for megavoltage x-ray beam," Med. Phys. 22, 2065-2073 (1995).
13. M. K. Yu and R. Sloboca, "Analytical representation of head scatter factors for shaped photon beams using a two-component x-ray source model," Med. Phys. 23, 973-984 (1996).
14. P. A. Jursinic, "Clinical implementation of a two-component x-ray source model for calculation of head-scatter factors," Med. Phys. 24, 2001-2007 (1997).
15. T. C. Zhu and B. E. Bjärngard, "Head scatter off-axis for megavoltage x rays," Med. Phys. 30, 533-543 (2003).
16. Y. Yang and L. Xing, "Incorporating leaf transmission and header scatter corrections into MLC leaf sequences for IMRT," Int. J. Radiat. Oncol., Biol., Phys. 55, 1121-1134 (2003).
17. L. Tillikainen, S. Siljamäki, H. Helminen, J. Alakuijala, and J. Pyyry, "Determination of parameters for a multiple-source model of megavoltage photon beams using optimization methods," Phys. Med. Biol. 52, 1441-1467 (2007).
18. J. Nocedal and S. J. Wright, Numerical Optimization (Springer-Verlag, New York, 1999).
19. P. Bloch and J. McDonough, "Extraction of the photon spectra from measured beam parameters," Med. Phys. 25, 752-757 (1998).
20. T. R. Mackie, A. F. Bielajew, D. W. O. Rogers, and J. J. Battista, "Generation of photon energy deposition kernels using the EGS Monte Carlo code," Phys. Med. Biol. 33, 1-20 (1988).
21. W. Lu, G. H. Olivera, M.-L. Chen, P. J. Reckwerdt, and T. R. Mackie, "Accurate convolution/superposition for multi-resolution dose calculation using cumulative tabulated kernels," Phys. Med. Biol. 50, 655-680 (2005).
22. P. D. Higgins, L. Siskind, C. H. Sibata, and J. W. Sohn, "Deconvolution of detector size effect for small field measurement," Med. Phys. 22, 1663-1666 (1995).
23. D. Herrup, J. Chu, H. Cheung, and M. Pankuch, "Determination of penumbral widths from ion chamber measurements," Med. Phys. 32, 3636-3640 (2005).
24. N. Sahoo, A. M. Kazi, and M. Hoffman, "Semi-empirical procedures for correcting detector size effect on clinical MV x-ray beam profiles," Med. Phys. 35, 5124-5133 (2008).
25. C. Fox, T. Simon, B. Simon, J. F. Dempsey, D. Kahler, J. R. Palta, C. Liu, and G. Yan, "Assessment of the setup dependence of detector response functions for mega-voltage linear accelerators," Med. Phys. 37, 477-484 (2010).
26. D. A. Low, W. B. Harms, S. Mutic, and J. A. Purdy, "A technique for the quantitative evaluation of dose distributions," Med. Phys. 25, 656-661 (1998).
27. G. Yan, C. Liu, B. Lu, J. R. Palta, and J. G. Li, "Comparison of analytic source models for head scatter factor calculation and planar dose calculation for IMRT," Phys. Med. Biol. 53, 2051-2067 (2008).
28. T. Solberg, B. Kavanagh, and P. Medin, in Image Guided and Adaptive Radiation Therapy, edited by R. Timmerman and L. Xing (Lippincott Williams and Wilkins, Baltimore, 2009), pp. 85-98.
29. A. Badal and A. Badano, "Accelerating Monte Carlo simulations of photon transport in a voxelized geometry using a massively parallel graphics processing unit," Med. Phys. 36, 4878-4880 (2009).
30. S. Hissoiny, B. Ozell, and P. Després, "Fast convolution-superposition dose calculation on graphics hardware," Med. Phys. 36, 1998-2005 (2009).
31. S. Hissoiny, B. Ozell, and P. Després, "A convolution-superposition dose calculation engine for GPUs," Med. Phys. 37, 1029-1037 (2010).
32. G. Pratx and L. Xing, "GPU computing in medical physics: A review," Med. Phys. 37 (2010).