[Almond PR. Radiation Physics of Electron Beams. In: Tapley N, editor. Clinical Applications of the Electron Beams. New York: John Wiley & Sons; 1976. p. 7-80.]Search in Google Scholar
[Cecatti ER, Goncalves JF, Cecatti SG, da Penha Silva M. Effect of the accelerator design on the position of the effective electron source. Med Phys. 1983 Sep-Oct;10(5):683-686.10.1118/1.595406]Search in Google Scholar
[Faermann S, Krutman Y, Weinstein M. A Comparison of the method of determination of virtual sources for electron beams. Proc. of the 5th Clinac User's Meeting; USA. 1983.]Search in Google Scholar
[Al-Ghazi MS, Lingman D, Arjune B, Gilbert LD, Thekkumthala J. Characteristics parameters of 6-21 MeV electron beams from a 21 MV linear accelerator. Med Phys. 1991;18:821-828.10.1118/1.596637]Search in Google Scholar
[Hogstrom KR. Evaluation of electron pencil beam dose calculation. Med Phys. 1985;12:554-557.]Search in Google Scholar
[ICRU REPORT 35. Radiation Dosimetry: Electron Beams with Energies Between 1 and 50 MeV. 1984.]Search in Google Scholar
[Jamshidi A, Kuchnir FT, Reft CS. Determination of the source position for the electron beams from a high energy linear accelerator. Med Phys. 1986;13:942-945.10.1118/1.595823]Search in Google Scholar
[Khan FM. Clinical electron beam dosimetry. Proceedings of the 1986 Summer School of the AAPM. New York (NY): p. 194-246.]Search in Google Scholar
[Khan FM, Sewchand W, Levitt SH. Effect of airspace on depth dose in electron beam therapy. Radiology. 1978;126:249-251.10.1148/126.1.249]Search in Google Scholar
[Meyer J, Palta J, Hogstrom K. Demonstration of relatively new electron dosimetry measurement techniques on the Mevatron 80. Med Phys. 1984 Sep-Oct;11(5):670-677.10.1118/1.595550]Search in Google Scholar
[Mills MD, Hogstrom KR, Almond PR. Prediction of electron beam output factors. Med Phys. 1982 Jan-Feb;9(1):60-68.10.1118/1.595138]Search in Google Scholar
[Ravikumar M, Ravichandran R. Effect of shielding on virtual source position for electron beams from a Clinac-1800 linear accelerator. J Med Phys. 1999;24:21-24.]Search in Google Scholar
[Schroder-Babo P. Determination of the virtual electron sources of a betatron. Acta Radiol. 1983; 364(suppl):7-10.]Search in Google Scholar
[Sharma AK, Supe SS, Sathiya Narayanan VK, Subbarangaiah K. Determination of virtual SSDs for electron beams from a dual energy linear accelerator. Strahlenther Onkol. 1992 Jul;168(7):402-405.]Search in Google Scholar
[Sweeney LE, Gur D, Bukovitz AG. Scatter component and its effect on virtual source and electron beam quality. Int J Radiat Oncol Biol Phys. 1981 Jul;7(7):967-971.10.1016/0360-3016(81)90018-3]Search in Google Scholar
[Khan FM, Doppke KP, Hogstrom KR, Kutcher GJ, Nath R, Prasad SC et al. Clinical electron-beam dosimetry: report of AAPM Radiation Therapy Committee Task Group No. 25. Med Phys. 1991 Jan-Feb;18(1):73-109.10.1118/1.5966951901132]Search in Google Scholar
[Thomadsen BR, Asp LW, Van de Geijn J, Paliwal BR, PoCheng C. Perturbation of electron beam doses as a function of SSD due to the use of shielding blocks on the Clinac-18. Med Phys. 1981 Jul-Aug;8(4):507-509.10.1118/1.5949996798397]Search in Google Scholar