Radiotherapy for Adult Medulloblastoma: Evaluation of Helical Tomotherapy, Volumetric Intensity Modulated Arc Therapy, and Three-Dimensional Conformal Radiotherapy and the Results of Helical Tomotherapy Therapy
Table 4
Statistical analysis results of target dose parameters among HT, VMAT, and 3D-CRT.
Parameters
Category
Mean (SD)
P value
Overall P value
P value among groups
HT
VMAT
3D-CRT
HT versus VMAT
HT versus 3D-CRT
VMAT versus 3D-CRT
Time
660.20 (52.17)
329.60 (3.51)
73.20 (8.41)
0.00
0.00
0.00
0.00
99.20 (0.88)
99.18 (0.52)
99.12 (0.93)
0.99
0.97
0.87
0.90
0.97 (1.75)
9.57 (8.66)
32.09 (27.81)
0.03
0.44
0.01
0.06
35.79 (2.86)
36.62 (3.11)
37.69 (3.58)
0.65
0.69
0.37
0.60
32.46 (3.92)
32.29 (2.64)
31.63 (2.62)
0.91
0.93
0.68
0.74
34.77 (2.67)
35.04 (2.97)
35.51 (2.97)
0.92
0.88
0.69
0.80
DHI
1.05 (0.02)
1.07 (0.02)
1.09 (0.02)
0.02
0.15
0.01
0.09
CI
0.87 (0.03)
0.86 (0.02)
0.69 (0.03)
0.00
0.57
0.00
0.00
Time: beam-on time (second); : % prescription dose delivered to percent volume; : irradiation dose delivered to 1% volume, representing the maximum dose; : irradiation dose delivered to 99% volume, representing the minimum dose; : average irradiation dose.
