Table I.
Parameters of the absorbed dose (Gy) in the planning target volume for three-dimensional conformal radiotherapy and IMRT.
| Technique | Median Dmin (range)a | Median Dmax (range)b | Median Dmean (range)c | Median Dmod (range)d | Median Dmed (range)e |
|---|---|---|---|---|---|
| 2-field | 42.7 (40.5–44) | 50.3 (46.6–53.9) | 46.8 (45.1–49.1) | 46.5 (45.2–48.2) | 46.8 (45.1–49) |
| 3-field | 42.9 (40.5–44.5) | 50.3 (46.1–55.9) | 46.9 (45.1–50) | 46.4 (45–49.2) | 46.8 (45.1–49.7) |
| 4-field | 43.3 (42.7–44.8) | 49.0 (46.2–50.7) | 46.2 (45–47.6) | 46.0 (44.2–47) | 46.1 (45.1–47.5) |
| IMRT | 42.5 (38.4–44.1) | 48.9 (47.3–52.4) | 45.9 (44.5–47.2) | 45.9 (44.1–47.3) | 45.9 (44.5–47.3) |
IMRT, intensity-modulated radiation therapy.
a
P=0.001
b
P<0.001
c
P<0.001
d
P=0.230
e
P<0.010. Median Dmin, median of all minimum doses; median Dmax, median of all maximum doses; median Dmean, median of all mean doses; median Dmod, median of all modal doses; median Dmed, median of all median doses.