Table 2: Comparison between VMAT plan and IMRT plan regarding dosimetric parameters.
|
|
VMAT plan (N = 5) |
IMRT plan (N = 5) |
Testa |
p-value |
|
PTV54 |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
105.40 ± 1.14 |
103.40 ± 0.89 |
-1.841 |
0.066 |
|
Median (Range) |
105 (104-107) |
104 (102-104) |
|
|
|
Minimum (%) |
|
|
|
|
|
Mean ± SD |
101.40 ± 0.89 |
100.20 ± 0.83 |
-1.890 |
0.059 |
|
Median (Range) |
102 (100-102) |
100 (99-101) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
91 ± 1 |
91.40 ± 0.54 |
-1.000 |
0.317 |
|
Median (Range) |
91 (90-92) |
91 (91-92) |
|
|
|
PTV50.4 |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
106.40 ± 0.54 |
103 ± 1 |
-2.041 |
0.041 |
|
Median (Range) |
106 (106-107) |
103 (102-104) |
|
|
|
Minimum (%) |
|
|
|
|
|
Mean ± SD |
76.64 ± 1.13 |
68.44 ± 4.56 |
-2.023 |
0.043 |
|
Median (Range) |
74 (73.70-76.20) |
70.20 (60.40-71.60) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
95.20 ± 0.83 |
93.80 ± 0.44 |
-2.070 |
0.038 |
|
Median (Range) |
95 (94-96) |
94 (93-94) |
|
|
|
Bowel |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
95.60 ± 1.14 |
101.40 ± 0.89 |
-2.060 |
0.039 |
|
Median (Range) |
96 (94-97) |
102 (100-102) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
49 ± 1.58 |
43 ± 1.58 |
-2.236 |
0.025 |
|
Median (Range) |
43 (41-45) |
43 (41-45) |
|
|
|
Right kidney |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
88.20 ± 2.38 |
89.80 ± 2.86 |
-2.070 |
0.038 |
|
Median (Range) |
88 (85-91) |
90 (86-93) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
27 ± 1 |
27 ± 1.22 |
0.000 |
1.000 |
|
Median (Range) |
27 (26-28) |
27 (25-28) |
|
|
|
Left kidney |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
102 ± 1.22 |
98.80 ± 1.30 |
-2.060 |
0.039 |
|
Median (Range) |
102 (101-104) |
99 (97-100) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
27.20 ± 1.78 |
30.80 ± 1.64 |
-2.070 |
0.038 |
|
Median (Range) |
27 (25-29) |
30 (29-33) |
|
|
|
Cord |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
74.40 ± 3.36 |
68.40 ± 3.20 |
-2.060 |
0.039 |
|
Median (Range) |
75 (70-78) |
68 (64-72) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
47.40 ± 1.81 |
38 ± 2 |
-2.070 |
0.038 |
|
Median (Range) |
47 (45-50) |
37 (36-41) |
|
|
|
Liver |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
102 ± 1.58 |
98.40 ± 1.14 |
-2.070 |
0.038 |
|
Median (Range) |
102 (100-104) |
98 (97-100) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
26.20 ± 1.48 |
26.60 ±1.67 |
-1.414 |
0.157 |
|
Median (Range) |
26 (24-28) |
27 (24-28) |
|
|
|
Stomach |
|
|
|
|
|
Maximum (%) |
|
|
|
|
|
Mean ± SD |
98.80 ± 1.30 |
99.20 ± 0.83 |
-1.414 |
0.157 |
|
Median (Range) |
99 (97-100) |
99 (98-100) |
|
|
|
Mean (%) |
|
|
|
|
|
Mean ± SD |
54 ± 3.08 |
60.40 ± 3.04 |
-2.070 |
0.038 |
|
Median (Range) |
55 (50-58) |
61 (56-64) |
|
|
|
ID |
|
|
|
|
|
V5 (cGy) |
|
|
|
|
|
Mean ± SD |
6196.80 ± 875.96 |
5750.40 ± 873.16 |
-2.070 |
0.038 |
|
Median (Range) |
6194 (4980-7210) |
5750 (4536-6760) |
|
|
|
V10 (cGy) |
|
|
|
|
|
Mean ± SD |
4784.60 ± 875.19 |
4560.40 ± 874.21 |
-2.032 |
0.042 |
|
Median (Range) |
4782 (3568-5798) |
4560 (3345-5572) |
|
|
|
V15 (cGy) |
|
|
|
|
|
Mean ± SD |
3727.40 ± 875.50 |
3612.80 ± 872.34 |
-2.032 |
0.042 |
|
Median (Range) |
3725 (2511-4740) |
3612 (2398-4622) |
|
|
|
Dose homogeneity |
|
|
|
|
|
TT |
|
|
|
|
|
Mean ± SD |
0.76 ± 0.03 |
1.68 ± 0.06 |
-2.032 |
0.042 |
|
Median (Range) |
0.76 (0.73-0.81) |
1.67 (1.60-1.78) |
|
|
|
CI |
|
|
|
|
|
Mean ± SD |
0.77 ± 0.02 |
0.35 ± 0.02 |
02.236 |
0.025 |
|
Median (Range) |
0.77 (0.74-0.80) |
0.35 (0.32-0.38) |
|
|
|
HI |
|
|
|
|
|
Mean ± SD |
0.090 ± 0.003 |
0.063 ± 0.001 |
-2.032 |
0.042 |
|
Median (Range) |
0.090 (0.085-0.095) |
0.065 (0.060-0.065) |
|
|