Table 2 Treatment parameters
From: Definitive radiotherapy for early stage glottic cancer by 6 MV photons
Parameters | Stage T1N0 | Stage T2N0 |
|---|---|---|
(433) Patients (%) | (262) Patients (%) | |
Field size (cm2) | ||
< 30.5 | 215 (49.6) | 0 |
30.5- 35.5 | 165 (38.1) | 106 (40.4) |
≥ 35.5 | 53 (12.2) | 156 (59.5) |
A. Dose fraction size | ||
2.5 Gy | 177 (40.8) | 86 (32.8) |
Total dose (Gy) | ||
55 | 30 (6.9) | 7 (2.7) |
57.5 | 134 (30.9) | 63 (24.0) |
60 | 13 (3.0) | 16 (6.1) |
Tx duration (days) | ||
30 | 25 (5.7) | 22 (8.4) |
31-34 | 141 (32.5) | 45 (17.1) |
≥ 35 | 11 (2.5) | 19 (7.2) |
BEDcGy15 (cGy) | ||
Median | 6520 | 6580 |
range | 6058- 6820 | 6160- 6820 |
B. Dose fraction size | ||
2.0 Gy | 256 (59.1) | 176 (67.1) |
Total dose (Gy) | ||
64 | 52 (12.0) | 24 (9.1) |
66 | 202 (46.6) | 109 (41.6) |
68 | 2 (0.46) | 2 (0.7) |
70 | 0 | 41 (15.6) |
Tx duration (days) | ||
≤45 | 48 (11.0) | 18 (6.8) |
46- 50 | 203 (46.8) | 110 (42.0) |
≥ 51 | 5 (1.15) | 48 (18.3) |
BEDcGy15 (cGy) | ||
Median | 6340 | 6520 |
range | 6040- 6700 | 6040- 6910 |