1-Johns HE, Cunningham JR. The physics of Radiology. 4th ed. Springfield: Thomas; 1983.
2-National Council on Radiation Protection and Measurements. Structural Shielding design and evaluation for megavoltage x- and gamma-ray radiotherapy facilities: recommendations of the National Council on Radiation Protection and Measurements. Bethesda: NCRPM; 2005. (NCRP report; no 151)
3-Khan FM. The physics of radiation therapy.4th ed. Philadelphia: Lippincott Williams & Wikins; 2010.
4-Hubbell JH, Seltzer SM. Tables of X-ray mass attenuation coefficients and mass energy-absorption coefficients from 1 KeV to 20meV for elements z=1 to 92 and 48 additional substances of dosimetric interest. NISTIR. 1995;5632:1-79.
5-Teli MT, Nathuram R, Mahajan CS. Single-experiment simultaneous-measurement of elemental mass attenuation coefficients of hydrogen, Carbon and Oxygen for 0.123-1.33 MeV gamma rays. Radiat Meas 2000;32:329-33.
6-Midgley SM. A parameterization scheme for the x-ray linear attenuation coefficient and energy absorption coefficient. Phys Med Biol 2004;49(2):307-25.
7-Midgley SM. Materials analysis using x-ray linear attenuation coefficient measurements at four photon energies. Phys Med Biol 2005;50(17):4139-57.
8-Akkurt I, Mavi B, Akkurt A, Basyigit C, Kilincarslan S, Yalim HA. Study on Z-dependence of partial and total mass attenuation coefficients. J Quant Spectrosc Ra 2005;94:379-85.
9-Croft S. Observations on the experimental determination of mass attenuation coefficients. Ann Nucl Energy 2006;33:466-71.
10-Han I, Demir L, Sahin M. Determination of mass attenuation coefficients, effective atomic and electron numbers for some natural minerals. Radiat Phys Chem 2009;78:760-4.
11-Alles J, Mudde RF. Beam hardening: analytical considerations of the effective attenuation coefficient of x-ray tomography. Med Phys 2007;34:2882-9.
12-Du Plessis FCP, Willemse CA. Monte Carlo calculation of effeective attenuation coefficient for various compensator materials. Med Phys 2003;30(9):2537-43.
13- Park JM, Kim J, Choi CH, Chie EK, Kim IH, Ye SJ. Photon energy-modulated radiotherapy: Monte Carlo simulation and treatment planning study. Radiat Ther Phy 2012;39(3):1265-77
14-International Atomic Energy Agency. Absorbed dose determination in external beam radiotherapy: an international code of practice for dosimetry based on standards of absorbed dose to water. New York: IAEA; 2004. (Technical Report; 398)
15-Ali ESM, Rogers DW. Functional forms for photon spectra of clinical linacs. Phys Med Biol 2012;57:31-50.
16- Brouwer WF, Kazem I, van Mil CJ. Four years experience with a mercury shielded irregular field system (MSIFS). Int J Radiat Oncol Biol Phys 1984;10(2):225-9.
17-Nelldal P. Design of a dynamic beam intensity modulator for radiation therapy [dissertation]. Stockholm: Univ. Stockholm; 2005.
19-Oguchi H, Obata Y. Commissioning of modulator-based IMRT with XiO treatment planning system. Med Phys 2009;36(1):261-9.
of absorber, radiotherapy.