Table 3 Comparison of dosimetric characteristics
Parameters | HT | HL2arc | HL4arc | Pa | |||
|---|---|---|---|---|---|---|---|
Median (IQR) | HT vs. HL2arc | HT vs. HL4arc | HL2arc vs. HL4arc | ||||
P_GTV | D2 (Gy) | 69.6 (69.30, 70.03) | 70.86 (70.13, 71.60) | 70.41 (69.63, 70.85) | 0.00 | 0.01 | 0.00 |
D98 (Gy) | 66.67 (66.51, 66.75) | 66.45 (66.37, 66.61) | 66.52 (66.41, 66.77) | 0.02 | 0.59 | 0.15 | |
HI | 1.04 (1.03, 1.05) | 1.06 (1.05, 1.08) | 1.06 (1.04, 1.06) | 0.00 | 0.00 | 0.00 | |
CI | 0.80 (0.76, 0.83) | 0.79 (0.74, 0.84) | 0.83 (0.79, 0.87) | 0.56 | 0.11 | 0.00 | |
P_CTV | D2 (Gy) | 69.13 (68.61, 69.48) | 69.89 (69.54, 71.14) | 69.67 (69.09, 70.24) | 0.00 | 0.00 | 0.00 |
D98 (Gy) | 55.32 (54.97, 55.69) | 55.04 (54.53, 55.85) | 55.17 (54.60, 55.68) | 0.29 | 0.98 | > 0.99 | |
HI | 1.25 (1.24, 1.26) | 1.28 (1.26, 1.29) | 1.27 (1.25, 1.28) | 0.00 | 0.01 | 0.00 | |
CI | 0.80 (0.78, 0.82) | 0.83 (0.79, 0.88) | 0.88 (0.85, 0.89) | 0.03 | 0.00 | 0.00 | |
Brain stem | Dmax (Gy) | 46.99 (39.98, 53.64) | 39.29 (34.42, 48.36) | 39.49 (31.92, 45.92) | 0.00 | 0.00 | 0.33 |
p_cord | Dmax (Gy) | 39.91 (31.19, 43.46) | 33.38 (29.75, 44.01) | 28.32 (25.20, 34.19) | > 0.99 | 0.00 | 0.00 |
Parotid glands | Dmean (Gy) | 25.88 (23.87, 27.87) | 28.00 (23.24, 33.99) | 25.36 (22.22, 26.89) | 0.04 | 0.05 | 0.00 |
Esophagus | Dmean (Gy) | 2.00 (0.68, 4.20) | 2.97 (0.89, 7.55) | 3.38 (1.01, 6.79) | 0.00 | 0.00 | > 0.99 |
Optic chiasm | Dmax (Gy) | 9.58 (5.95, 24.87) | 6.07 (4.96, 18.89) | 6.22 (4.92, 15.28) | 0.00 | 0.00 | 0.05 |
Optic nerve | Dmax (Gy) | 14.03 (7.02, 27.02) | 7.85 (5.55, 17.15) | 7.47 (5.46, 14.65) | 0.00 | 0.00 | 0.08 |
Cochlea | Dmean (Gy) | 26.05 (22.69, 30.10) | 32.97 (29.01, 38.71) | 37.40 (33.49, 40.65) | 0.00 | 0.00 | 0.02 |
Eyeball | Dmax (Gy) | 14.14 (9.60, 17.42) | 11.31 (5.09, 17.74) | 10.90 (5.36, 17.50) | 0.76 | 0.14 | 0.26 |
Lens | Dmax (Gy) | 2.66 (1.94, 3.95) | 3.07 (2.12, 6.05) | 3.03 (2.11, 5.36) | 0.01 | 0.00 | > 0.99 |
Oral cavity | Dmean (Gy) | 22.03 (19.79, 24.85) | 23.96 (20.84, 28.02) | 24.14 (20.17, 27.53) | 0.03 | 0.04 | > 0.99 |
V15 (%) | 63.57 (56.46, 75.79) | 86.46 (68.99, 93.65) | 82.62 (60.65, 97.29) | 0.01 | 0.00 | 0.66 | |
V30 (%) | 22.09 (17.03, 29.39) | 26.14 (16.58, 38.12) | 22.41 (16.04, 32.76) | 0.29 | > 0.99 | 0.31 | |
V45 (%) | 6.29 (4.34, 9.73) | 5.53 (3.04, 9.33) | 6.01 (3.08, 8.30) | 0.87 | 0.01 | 0.71 | |
SMG | Dmean (Gy) | 23.49 (21.56, 25.07) | 24.01 (22.96, 26.28) | 24.17 (22.49, 25.30) | 0.02 | 0.11 | 0.66 |
Dose spillage volume | VHS for P_GTV | 1.68 (1.35, 2.12) | 2.03 (1.40, 3.01) | 1.81 (1.22, 2.64) | 0.01 | > 0.99 | 0.00 |
VHS for P_CTV | 0.61 (0.56, 0.71) | 0.43 (0.39, 0.55) | 0.40 (0.36, 0.42) | 0.00 | 0.00 | 0.00 | |
VIS for P_CTV | 3.75 (3.40, 4.24) | 2.79 (2.56, 3.10) | 2.62 (2.46, 2.85) | 0.00 | 0.00 | 0.03 | |
VLS for P_CTV | 13.02 (11.02, 13.95) | 6.14 (5.87, 6.61) | 6.00 (5.67, 6.58) | 0.00 | 0.00 | 0.15 | |