Compensation of x-ray beam penumbra in conformal radiotherapy

Medical Physics

Volumn 27, Issue 8, 2000, Pages 1739-1745

  Sharpe, M B ^a   Miller, B M ^a   Wong, J W ^a  

^a WILLIAM BEAUMONT HOSPITAL   (United States)

Author keywords

Beam penumbra; Conformal radiotherapy; Intensity modulation; Radiation therapy; X ray beam

Indexed keywords

BIOMEDICAL ENGINEERING; RADIOTHERAPY; THREE DIMENSIONAL COMPUTER GRAPHICS; TISSUE;

BEAM PENUMBRA; COMPENSATION TECHNIQUES; CONFORMAL RADIOTHERAPY; INTENSITY MODULATIONS; MULTILEAF COLLIMATORS; PLANNING TARGET VOLUMES; SUPERPOSITION ALGORITHMS; X RAY BEAM;

X RAYS;

ALGORITHM; ARTICLE; CALCULATION; COLLIMATOR; COMPUTER ASSISTED RADIOTHERAPY; LUNG MODEL; PRIORITY JOURNAL; RADIATION BEAM; RADIATION DOSE DISTRIBUTION; TECHNIQUE; TREATMENT PLANNING; VALIDATION PROCESS;

EID: 0033857385     PISSN: 00942405     EISSN: None     Source Type: Journal    
DOI: 10.1118/1.1287283     Document Type: Article

References (37)

1. J. W. Wong, M. B. Sharpe, D. A. Jaffray, V. R. Kini, J. M. Robertson, J. S. Stromberg, and A. A. Martinez, "The use of active breathing control (ABC) to reduce margin for breathing motion," Int. J. Radiat. Oncol., Biol., Phys. 44, 911-919 (1999).
2. D. A. Jaffray, D. Yan, and J. W. Wong, "Managing geometric uncertainty in conformal intensity-modulated radiation therapy," Semin. Radiat. Oncol. 9, 4-19 (1999).
3. G. C. Bentel, Patient Positioning and Immobilization in Radiation Oncology (McGraw-Hill, New York, 1999).
4. D. Yan, F. A. Vicini, J. W. Wong, and A. A. Martinez, "Adaptive radiation therapy," Phys. Med. Biol. 42, 123-132 (1997).
5. D. Yan, J. Wong, F. Vicini, J. Michalski, C. Pan, A. Frazier, E. Horwitz, and A. Martinez, "Adaptive modification of treatment planning to minimize the deleterious effects of treatment setup errors," Int. J. Radiat. Oncol., Biol., Phys. 38, 197-206 (1997).
6. D. Yan, E. Ziaja, D. Jaffray, J. Wong, D. Brabbins, F. Vicini, and A. Martinez, "The use of adaptive radiation therapy to reduce setup error: A prospective clinical study," Int. J. Radiat. Oncol., Biol., Phys. 41, 715-720 (1998).
7. Report 50, Prescribing, Recording, and Reporting Photon Beam Therapy, International Commision on Radiation Units and Measurements, Washington, D.C., 1993.
8. 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 beams," Med. Phys. 22, 2065-2074 (1995).
9. R. O. Kornelsen and M. E. Young, "Changes in the dose-profile of a 10 MV x-ray beam within and beyond low density material," Med. Phys. 9, 114-116 (1982).
10. D. J. Dawson, J. M. Harper, and A. C. Akinradewo, "Analysis of physical parameters associated with the measurement of high-energy x-ray penumbra," Med. Phys. 11, 491-497 (1984).
11. J. S. Laughlin, R. Mohan, and G. J. Kutcher, "Choice of optimum megavoltage for accelerators for photon beam treatment," Int. J. Radiat. Oncol., Biol., Phys. 12, 1551-1557 (1986).
12. K. E. Ekstrand and W. H. Barnes, "Pitfalls in the use of high energy x rays to treat tumors in the lung," Int. J. Radiat. Oncol., Biol., Phys. 18, 249-252 (1990).
13. J. J. Battista and M. B. Sharpe, "True three-dimensional dose computations for megavoltage x-ray therapy: A role for the superposition principle," Australas. Phys. Eng. Sci. Med. 15, 159-178 (1992).
14. M. A. Hunt, G. E. Desobry, B. Fowble, and L. R. Coia, "Effect of low-density lateral interfaces on soft-tissue doses," Int. J. Radiat. Oncol., Biol., Phys. 37, 475-482 (1997).
15. P. J. Biggs and W. U. Shipley, "A beam width improving device for a 25 MV x ray beam," Int. J. Radiat. Oncol., Biol., Phys. 12, 131-135 (1986).
16. B. K. Lind, P. Kallman, B. Sundelin, and A. Brahme, "Optimal radiation beam profiles considering uncertainties in beam patient alignment," Acta Oncol. 32, 331-342 (1993).
17. R. Mohan, W. Qiuwen, W. Xiaohong, and J. Stein, "Intensity modulation optimization, lateral transport of radiation, and margins," Med. Phys. 23, 2011-2021 (1996).
18. M. L. Dirkx, B. J. Heijmen, G. A. Korevaar, M. J. van Os, J. C. Stroom, P. C. Koper, and P. C. Levendag, "Field margin reduction using intensity-modulated x-ray beams formed with a multileaf collimator," Int. J. Radiat. Oncol., Biol., Phys. 38, 1123-1129 (1997).
19. M. J. Brugmans, A. van der Horst, J. V. Lebesque, and B. J. Mijnheer, "Beam intensity modulation to reduce the field sizes for conformal irradiation of lung tumors. A dosimetric study," Int. J. Radiat. Oncol., Biol., Phys. 43, 893-904 (1999).
20. R. Mohan, X. Wang, and A. Jackson, "Optimization of 3D conformal radiation treatment plans. [Review]," Front. Radiat. Ther. Oncol. 29, 86-103 (1996).
21. C. X. Yu, M. J. Symons, M. N. Du, A. A. Martinez, and J. W. Wong, "A method for implementing dynamic photon beam intensity modulation using independent jaws and a multileaf collimator," Phys. Med. Biol. 40, 769-787 (1995).
22. D. A. Jaffray, J. J. Battista, A. Fenster, and P. Munro, "X-ray sources of medical linear accelerators: Focal and extra-focal radiation," Med. Phys. 20, 1417-1427 (1993).
23. R. Mohan, C. Chui, and L. Lidofsky, "Energy and angular distributions of photons from medical linear accelerators," Med. Phys. 12, 592-597 (1985).
24. E. L. Chaney, T. J. Cullip, and T. A. Gabriel, "A Monte Carlo Study of accelerator head scatter," Med. Phys. 21, 1383-1390 (1994).
25. 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).
26. M. B. Sharpe, "Dose calculations for static and dynamic delivery of x ray beams shaped with a multileaf collimator," Med. Phys. 23, 1073-1074 (1996).
27. D. Convery and S. Webb, Calculation of the Distribution of Head-scattered Radiation in Dynamically-Collimated MLC Fields, edited by D. D. Leavitt and G. Starkschall, Twelfth International Conference on the Use of Computers in Radiation Therapy, 1997 (Medical Physics Publishing, Madison, WI, 1997).
28. A. R. Hounsell and J. M. Wilkinson, "Head scatter modeling for irregular field shaping and beam intensity modulation," Phys. Med. Biol. 42, 1737-1749 (1997).
29. M. Saxner, A. Lofgren, and A. Ahnesj, Integration of Head Scatter Fluence Calculations in Treatment Planning, edited by D. D. Leavitt, and G. Starkschall, Twelfth International Conference on the Use of Computers in Radiation Therapy, 1997 (Medical Physics Publishing, Madison, WI, 1997).
30. T. R. Mackie, A. F. Bielajew, D. W. Rogers, and J. J. Battista, "Generation of photon energy deposition kernels using the EGS Monte Carlo code," Phys. Med. Biol. 33, 1-20 (1988).
31. T. R. Mackie, J. W. Scrimger, and J. J. Battista, "A convolution method of calculating dose for 15-MV x rays," Med. Phys. 12, 188-196 (1985).
32. J. E. O'Connor, "The variation of scattered x rays with density in an irradiated body," Phys. Med. Biol. 1, 352-369 (1957).
33. Z. Li and E. E. Klein, "Surface and peripheral doses of dynamic and physical wedges," Int. J. Radiat. Oncol., Biol., Phys. 37, 921-925 (1997).
34. C. X. Yu, D. A. Jaffray, and J. W. Wong, "The effects of intratraction organ motion on the delivery of dynamic intensity modulation," Phys. Med. Biol. 43, 91-104 (1998).
35. H. D. Kubo and B. C. Hill, "Respiration gated radiotherapy treatmenl: A technical study," Phys. Med. Biol. 41, 83-91 (1996).
36. J. Hanley, M. M. Debois, D. Mah, G. S. Mageras, A. Raben, K. Rosenzweig, B. Mychalczak, L. H. Schwartz, P. J. Gloeggler, and W. Lutz, et al. "Deep inspiration breath-hold technique for lung tumors: The potential value of largel immobilization and reduced lung density in dose escalalion," Int. J. Radiat. Oncol., Biol., Phys. 45, 603-611 (1999).
37. M. R. Sontag, "Respiratory gated radiotherapy," Med. Phys. 26, 1112 (1999).