Table 2 The mean dose (D mean ) and the maximum dose (D max ) to each of the swallowing structures and the partial volumes of each of these structures receiving a specified dose (V D S) as calculated from the dose-volume histograms (DVH) for patients with nasopharyngeal primaries
Dose-volume data | |||||
|---|---|---|---|---|---|
Swallowing structure | Dmean (Gy) Mean ± SD (range) | Dmax (Gy) Mean ± SD (range) | V60 (%) Mean ± SD (range) | V65 (%) Mean ± SD (range) | V70 (%) Mean ± SD (range) |
PCM | 66.03 ± 2.19 (63.17 - 69.96) | 72.69 ± 1.62 (69.92 - 74.85) | 89.24 ± 9.20 (73.27 - 99.92) | 64.75 ± 22.79 (20.19 - 90.38) | 27.91 ± 21.83 (0.00-65.33) |
SPCM | 68.35 ± 2.66 (63.29 - 71.65) | 72.66 ± 1.64 (69.92 - 74.85) | 99.14 ± 1.64 (94.98 - 100.00) | 81.35 ± 26.41 (24.37 - 100.00) | 37.66 ± 30.09 (0.00-83.03) |
MPCM | 65.30 ± 2.77 (61.28 - 69.62) | 67.69 ± 2.60 (64.23 - 72.03) | 97.63 ± 6.43 (79.56 - 100.00) | 51.33 ± 45.38 (0.00 - 100.00) | 4.80 ± 11.93 (0.00-37.40) |
IPCM | 59.96 ± 4.09 (50.39 - 63.35) | 65.86 ± 3.18 (61.27 - 71.83) | 58.50 ± 34.43 (2.35 - 100.00) | 12.09 ± 19.33 (0.00-48.71) | 0.62 ± 1.97 (0.00-6.22) |
BOT | 52.85 ± 13.03 (36.80 - 68.08) | 70.02 ± 2.79 (65.36 - 74.00) | 62.38 ± 32.78 (15–99.55) | 34.12 ± 31.63 (0.01-90.03) | 5.54 ± 11.05 (0.00-34.86) |
Larynx | 62.55 ± 5.76 (50.56 - 68.07) | 70.43 ± 2.97 (64.45 - 73.54) | 74.92 ± 28.33 (29.27 - 100.00) | 52.05 ± 31.83 (0.00-89.83) | 9.52 ± 12.30 (0.00-32.72) |
PES | 50.97 ± 3.22 (46.09 - 57.15) | 53.78 ± 4.76 (47.11 - 61.75) | 2.08 ± 4.40 (0.00 - 11.10) | 0.00 | 0.00 |