Table 1 The comparison of the 2D, 3D globe, and organ-specific GP (%) for 30 NPC cases with different gamma criteria
3%/3 mm | 2%/2 mm | 1%/1 mm | |
|---|---|---|---|
GP (%) | GP (%) | GP (%) | |
Global GP (%) | |||
2D phantom verification | 96.4 ± 2.9 [90.1–99.7] | 90.2 ± 5.5 [74.9–99.0] | 60.9 ± 9.6 [41.2–84.6] |
3Dreconstruction verification | 97.7 ± 3.2 [86.3–99.6] | 91.3 ± 6.2 [71.1–98.7] | 67.8 ± 9.9 [40.6–88.7] |
p | 0.002 | 0.152 | 0.000 |
Organ GP (%) of 3D reconstruction verification | |||
PTVnx (70 Gy) | 93.78 ± 11.03 [57–100] | 79.24 ± 22.1 [23.1–99.8] | 46.55 ± 24.83 [4–85.8] |
PTV1 (60 Gy) | 95.61 ± 7.31 [72.6–100] | 83.12 ± 17.19 [41.2–99.9] | 50.47 ± 21.37 [8–87.9] |
PTV2 (54 Gy) | 94.41 ± 7.48 [67.4–99.8] | 81.32 ± 11.81 [55.3–99.4] | 50.45 ± 15.46 [22.4–87.4] |
Spinal cord | 98.24 ± 2.32 [90.2–100] | 89.09 ± 8.45[64.3–100] | 57.43 ± 14.18[30.9–85.3] |
Brainstem | 99.17 ± 1.48 [93.7–100] | 94.00 ± 7.41[71.9–100] | 65.41 ± 19.49 [14.3–91] |
Left parotid gland | 99.22 ± 2.78 [84.8–100] | 95.85 ± 6.01[72.3–100] | 78.84 ± 12.96 [49.1–96.8] |
Right parotid gland | 99.25 ± 2.21 [89.9–100] | 95.44 ± 6.15[75.8–100] | 76.50 ± 15.47 [43.1–97.2] |
Left temporal lobe | 99.40 ± 1.78 [92.4–100] | 95.14 ± 7.51[65.6–100] | 70.03 ± 24.06 [18.2–95.1] |
Right temporal lobe | 99.35 ± 1.61 [92.6–100] | 95 ± 6.60 [71.6–100] | 69.1 ± 21.43 [11.6–96.1] |
Larynx | 96.52 ± 5.21 [78.4–100] | 86.38 ± 13.85[50.6–100] | 55.88 ± 26.23 [12.8–90.9] |