Energy Modulated Photon Radiotherapy: A Monte Carlo Feasibility Study

Table 2

Monte Carlo simulated percentage doses at certain depths for various beam energies. The measured data were listed in the brackets in bold.

Beam index	Photon beam energy
	10 MV	6 MV	5 MV	4 MV	3 MV	2 MV
%	23.4 (44.7)	36.1 (63.7)	41.5	51.2	60.5	73.9
%	73.9 (73.4)	66.5 (66.7)	64.7	61.0	58.7	55.8
%	46.3 (46.3)	38.5 (38.2)	35.9	32.2	29.1	24.9
%	29.0 (29.0)	22.0 (21.7)	19.8	16.8	14.3	11.1
	0.627 (0.630)	0.579 (0.573)	0.555	0.528	0.496	0.446

a, b, c, and d are percentage doses at depths of 0, 10, 20, and 30 cm, respectively. e is the tissue phantom ratio calculated as .