Energy Modulated Photon Radiotherapy: A Monte Carlo Feasibility Study
Table 4
Characteristics of the tumors and beam setup of six cases in this study. Beam energies of the original IMRT plans were listed in parallel to those of the EMXRT plans in bold.
Tumor site
/cm3
/cm
/Gy
Beam number
Gantry angle
Energy/MV (IMRT)
Energy/MV (EMXRT)
/cm
/cm
Prostate
119.9
6.1
66.6
1
180
10
5
9.9
5.4
2
225
10
5
11.1
6.0
3
285
10
10
20.0
3.8
4
135
10
5
11.3
6.3
5
75
10
10
19.9
6.8
Lung
15.5
3.1
50.0
1
330
6
4
10.9
2.2
2
260
6
5
17.2
2.3
3
240
6
4
11.3
2.2
4
220
6
4
8.4
2.2
5
180
6
5
8.7
2.8
6
250
6
5
14.8
2.2
7
50
6
5
15.5
1.7
8
30
6
4
11.6
2.1
9
10
6
5
10.5
2.8
Thyroid
166.6
6.8
60.0
1
250
6
5
5.0
7.7
2
210
6
4
3.6
3.5
3
180
6
3
2.5
2.9
4
150
6
3
1.8
2.1
5
110
6
5
5.3
7.7
Brain
50.2
4.6
20.0
1
310
6
5
7.5
5.3
2
110
6
5
6.8
5.4
3
75
6
5
6.6
5.5
4
50
6
5
6.4
5.0
5
0
6
5
6.2
4.7
Spine
17.5
3.2
20.0
1
345
6
5
7.3
3.8
2
320
6
5
8.8
4.1
3
290
6
5
15.3
2.7
4
235
6
5
15.3
4.1
5
210
6
5
15.5
4.1
6
180
6
5
16.6
4.0
7
160
6
10
17.8
4.0
8
130
6
5
17.4
4.2
9
70
6
5
12.8
3.9
10
40
6
5
9.7
4.0
11
15
6
5
8.0
3.9
Head & neck
193.0
7.2
68.0
1
340
6
4
8.5
2.2
2
310
6
5
8.4
3.1
3
255
6
5
5.7
4.4
4
215
6
4
7.0
2.9
5
180
6
4
8.2
2.3
6
145
6
4
7.1
2.8
7
105
6
5
4.7
6.1
8
50
6
4
7.1
3.1
9
20
6
5
8.3
2.8
is the volume of PTV. is the diameter of equivalent sphere of PTV volume. is the prescription dose for PTV. is effective path length. is tumor size.
