Qualitative analysis of irregular fields delivered with dual electron multileaf collimator: A Monte Carlo study

• Autorzy: Inyang S. O. , Chamberlain A.

Identyfikatory

DOI

10.1515/pjmpe-2016-0002

• Języki publikacji: EN

Abstrakty

EN

The use of a dual electron multileaf collimator (eMLC) to collimate therapeutic electron beam without the use of cutouts has been previously shown to be feasible. Further Monte Carlo simulations were performed in this study to verify the nature and appearance of the isodose distribution in water phantom of irregular electron beams delivered by the eMLC. Electron fields used in this study were selected to reflect those used in electron beam therapy. Results of this study show that the isodose distribution in a water phantom obtained from the simulation of irregular electron beams through the eMLC conforms to the pattern of the eMLC used in the delivery of the beam. It is therefore concluded that the dual eMLC could deliver isodose distributions reflecting the pattern of the eMLC field that was used in the delivery of the beam.

Słowa kluczowe

EN

irregular fields; Monte Carlo; electron multileaf collimator; cut-out; applicator

• Wydawca: Polskie Towarzystwo Fizyki Medycznej
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2016
• Tom: Vol. 22, Iss. 1
• Strony: 5--9
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Inyang S. O.

• Department of Medical Physics, University of Limpopo, Medunsa Campus, Medunsa 0204, South Afric
• Department of Physics, University of Calabar, Calabar, Nigeria

autor

Chamberlain A.

• Department of Medical Physics, University of Limpopo, Medunsa Campus, Medunsa 0204, South Afric

Bibliografia

• [1] Khan FM. The physics of radiation therapy. 3rd edition. Philadelphia: Lippincott Williams and Wilkins; 2003.
• [2] Stanton R, Stinson D. Applied radiation physics for radiation oncology. Madison (Wisconsin): Medical Physics Publishing; 1996.
• [3] Lee MC, Jiang SB, Ma C-M. Monte Carlo and experimental investigation of multileaf collimated electron beams for modulated electron radiation therapy. Med Phys. 2000;27(12):2708-2718.
• [4] Ma C-M, Pawlicki T, Lee MC, et al. Energy- and intensity- modulated electron beams for radiotherapy. Phys Med Biol. 2000;45(8):2293-2311.
• [5] Ravindran BP, Singh IR, Brindha S, et al. Manual multi-leaf collimator for electron beam shaping – a feasibility study. Phys Med. Biol. 2002;47(24):4389-4396.
• [6] Blomquist M, Karlsson MG, Zackrisson B, et al. Multileaf collimation of electrons – clinical effects on electron energy modulation and mixed beam therapy depending on treatment head design. Phys Med Biol. 2002;47(7):1013-1024.
• [7] Karlsson MG, Karlsson M. Electron collimation with focused and curved leaf end MLCs – experimental verification of Monte Carlo optimized designs. Med Phys. 2002;29(4):631-637.
• [8] Hogstrom KR, Boyd RA, Antolak JA, et al. Prototype retractable eMLC for fixed-beam electron therapy. Phys Med Biol. 2004;31(3):443-462.
• [9] Olofsson L, Karlsson MG, Karlson M. Effects on electron penumbra using the photon MLC to reduce bremsstrahlung leakage from add-on electron MLC. Phys Med Biol. 2005;50(6):1191-1203.
• [10] McParland BJ. A method of calculating the output factors of arbitrarily shaped electron fields. Med Phys. 1989;16(1):88-93.
• [11] Washington CM, Leaver DT. Principles and practice of radiation therapy: Physics, simulation, and treatment planning. St Louis (Missouri): Mosby; 1996.
• [12] Inyang SO, Chamberlain AC. Monte Carlo simulations of electron beams collimated with dual electron multileaf collimator: a feasibility study. Radiol Phys Tech. 2009;2(2):210-218.
• [13] Inyang SO, Chamberlain AC. Optimization of the dual electron multileaf collimator materials using the EGSnrc. Radiol Phys. Tech. 2010;3(2):165-170.
• [14] Kudchadker RJ, Hogstrom KR, Garden AS, et al. Electron conformal radiotherapy using bolus and intensity modulation. Int Journal Radiat Oncol Biol Phys. 2002;53(4):1023-1037.
• [15] Du Plessis FC, Leal A, Stathakis S, et al. Characterization of megavoltage electron beams delivered through multi-leaf collimator (pMLC). Phys Med Biol. 2006;51(8):2113-2129.
• [16] Rogers DWO, Ma C-M, Walters B, et al. BEAMnrc Users Manual. Ottawa: National Research Council (NRC) of Canada, Report PIRS-0509(A): 2002.
• [17] Walters BRB, Rogers DWO. DOSXYZnrc Users Manual. Ottawa: National Research Council (NRC) of Canada, Report PIRS-794: 2002.
• [18] IAEA. Review of Radiation Oncology Physics: A Handbook for Teachers and Students. Vienna: International Atomic Energy Agency, Educational Report Series: 2003.