The Study of Field Equivalence Determined by the Modeled Percentage Depth Dose in Electron Beam Radiation Therapy
Table 1
The comparison in fitting the electron energy of 12 MeV with 5 cone sizes from to is demonstrated in (a). The ranges of error between the model and the measurements for different electron energies are listed in (b).
(a) This table demonstrates the comparison in fitting the electron energy of 12 MeV with 5 cone sizes from to at
Depth (mm)
6-cone modeling
6-cone standard
Deviation (%)
10-cone modeling
10-cone standard
Deviation (%)
15-cone modeling
15-cone standard
Deviation (%)
20-cone modeling
20-cone standard
Deviation (%)
25-cone modeling
25-cone standard
Deviation (%)
0
82.29
83.83
-1.84
79.93
83.34
-4.09
79.93
82.8
-3.47
79.93
83.24
-3.98
79.93
83.1
-3.81
5
89.59
89.04
0.62
88.49
88.27
0.25
88.49
88.12
0.42
88.49
88.29
0.23
88.49
88.04
0.51
10
94.26
92.65
1.74
93.68
91.81
2.04
93.68
91.8
2.05
93.68
91.75
2.10
93.68
91.65
2.21
15
97.35
95.69
1.73
97.05
95.01
2.15
97.05
94.9
2.27
97.05
94.8
2.37
97.05
94.63
2.56
20
99.3
98.33
0.99
99.17
97.63
1.58
99.17
97.76
1.44
99.17
97.57
1.64
99.17
97.55
1.66
25
100
99.88
0.12
100
99.56
0.44
100
99.71
0.29
100
99.64
0.36
100
99.61
0.39
30
98.92
98.93
-0.01
99.04
99.47
-0.43
99.04
99.11
-0.07
99.04
99.19
-0.15
99.04
99.19
-0.15
35
94.79
93.35
1.54
95.08
94.82
0.27
95.08
93.86
1.30
95.08
94.37
0.75
95.08
93.78
1.39
40
84.52
81.65
3.52
85.13
83.98
1.37
85.13
82
3.82
85.13
82.56
3.11
85.13
81.76
4.12
45
64.59
63.5
1.72
65.55
66.22
-1.01
65.55
63.91
2.57
65.55
64.22
2.07
65.55
62.98
4.08
50
39.93
41.84
-4.57
43.58
44.39
-1.82
40.58
41.83
-2.99
40.58
42.06
-3.52
40.58
40.81
-0.56
55
21.97
22.03
-0.27
21.9
23.63
-7.32
21.39
21.5
-0.51
21.9
21.97
-0.32
21.9
20.99
4.34
60
8.87
8.46
4.85
9.25
9.22
0.33
8.25
8.19
0.73
8.25
8.54
-3.40
8.25
8.09
1.98
65
3.49
3.32
2.71
3.67
3.64
0.82
3.77
3.32
7.53
3.28
3.42
-4.09
3.18
3.27
-2.75
70
2.31
2.16
2.31
2.53
2.31
5.19
2.25
2.23
5.38
2.25
2.22
1.35
2.15
2.14
0.47
75
2.13
2.04
4.41
2.15
2.19
-1.83
2.25
2.15
4.65
2.15
2.14
0.47
2.25
2.06
9.22
80
2.43
2.49
-2.41
2.18
2.14
1.87
2.08
2.13
-2.35
2.28
2.31
-1.30
2.35
2.47
-4.86
(b) This table demonstrates the comparison in fitting the five electron energies with cone size at
