The aim of the study was to verify the accuracy of calculations of dose distributions for electron beams performed using the electron Monte Carlo (eMC) v.10.0.28 algorithm implemented in the Eclipse treatment planning system (Varian Medical Systems). Implementation of the objective of the study was carried out in two stages. In the first stage the influence of several parameters defined by the user on the calculation accuracy was assessed. After selecting a set of parameters for which the best results were obtained a series of tests were carried. The tests were carried out in accordance with the recommendations of the Polish Society of Medical Physics (PSMP). The calculation and measurement of dose rate under reference conditions for semi quadratic and shaped fields were compared by individual cut-outs. We compared the calculated and measured percent depth doses, profiles and output factors for beams with an energy of 6, 9, 12, 15 and 18 MeV, for semi quadratic fields and for three different SSDs 100, 110, and 120 cm. All tests were carried out for beams generated in the Varian 2300CD Clinac linear accelerator. The results obtained during the first stage of the study demonstrated that the highest compliance between the calculations and measurements were obtained for the mean statistical uncertainty equal to 1, and the parameter responsible for smoothing the statistical noise defined as medium. Comparisons were made showing similar compliance calculations and measurements for the calculation grid of 0.1 cm and 0.25 cm and therefore the remaining part of the study was carried out for these two grids. In stage 2 it was demonstrated that the use of calculation grid of 0.1 cm allows for greater compliance of calculations and measurements. For energy 12, 15 and 18 MeV discrepancies between calculations and measurements, in most cases, did not exceed the PSMP action levels. The biggest differences between measurements and calculations were obtained for 6 MeV energy, for smallest fields and large SSD distances. Despite these discrepancies between calculations the model was adopted for clinical use.
If the inline PDF is not rendering correctly, you can download the PDF file here.
 Hogstrom KR Mills D Almond PR. Electron beam dose calculations. Phys Med Biol. 1981;26(3): 455-459.
 Cygler J Battista JJ Scrimger JW et al Electron dose distributions in experimental phantoms: A comparison with 2D pencil beam calculations. Phys Med Biol. 1987:32(9):1073-1086.
 Hogstrom KR Mills D Meyer JA et al. Dosimetric evaluation of a pencil-beam algorithm for electrons employing a two-dimensional heterogeneity correction. Int J Radiat Oncol Biol Phys. 1984;10(4):561-569.
 Mah E Antolak JA Scrimger JW et al. Experimental evaluation of a 2D and 3D electron pencil beam algorithm. Phys Med Biol. 1989;34(9):1179-1194.
 Alizadeh M Ghorbani M Haghparast A et al. A Monte Carlo study on dose distribution evaluation of Flexisource 192Ir brachytherapy source. Rep Pract Oncol Radiother. 2015;20(3):204-209.
 Camgöz B Kumru MN. A Monte Carlo evaluation for effects of probable dimensional uncertainties of low dose rate brachytherapy seeds on dose. Rep Pract Oncol Radiother. 2014;19(5):301-309.
 Ding GX Cygler JE Yu CW et al. A comparison of electron beam dose calculation accuracy between treatment planning systems using either a pencil beam or a Monte Carlo algorithm. Int J Radiat Oncol Biol Phys. 2005;63(2):622-633.
 Manuals Eclipse Algorithms Reference Guide Varian Medical Systems 2010.
 IAEA. Commissioning and quality assurance of computerized planning systems for radiation treatment of cancer. Vienna: International Atomic Energy Agency Technical Report Series TRS-430; 2005.
 Fraass B Doppke K Hunt M et al. American Association of Physicists in Medicine Radiation Therapy Committee Task Group 53: Quality assurance for clinical radiotherapy treatment planning. Med Phys. 1998;25(10):1773-1829.
 IAEA. Commissioning of radiotherapy treatment planning systems: testing for typical external beam treatment techniques. Vienna: International Atomic Energy Agency TECDOC 1583; 2008.
 IAEA. Absorbed Dose Determination in External Beam Radiotherapy. Vienna: International Atomic Energy Agency Technical Report Series 398; 2000.
 Dybek M Winiecki J Iwanicki T et al. Kontrola systemów planowania leczenia 3D w radioterapii wiązkami zewnętrznymi fotonów i elektronów. Zalecenia Polskiego Towarzystwa Fizyki Medycznej. Pol J Med Phys Eng. 2014;20(1):1-32.
 Mijnheer B Olszewska A Fiorino C et al. Quality assurance of treatment planning systems. Practical examples for non-IMRT photon beams. ESTRO Booklet no. 7. Brussels: ESTRO; 2005.
 Xu Z Walsh SE Telivala TP et al. Evaluation of the eclipse electron Monte Carlo dose calculation for small fields. J Appl Clin Med Phys. 2009;10(3):75-85.