The Study of Field Equivalence Determined by the Modeled Percentage Depth Dose in Electron Beam Radiation Therapy

Table 3

The maximum ionizing depth, dose maximum depth, and mean energy in five different electron energies with , () is shown. The depth at which the dose is 50% of the maximum dose is defined as in this study.

Nominal energy (MeV)	(MeV)	(mm)	(mm)	(mm)	(mm)	X-ray contamination (%)
6	5.41	11.1/12.1	16.9	23.2	30.2	0.7
9	8.66	20.6/21.5	28.3	37.1	45.1	1.2
12	11.27	26.1/27.1	37.4	48.3	58.7	2.1
15	14.04	27.1/28.4	46.1	60.3	73.7	2.6
18	17.03	24.3/25.2	56.8	73.1	88.7	3.5