Table 3.
Breast dosimetry in relation to arm positioning.
| Breast laterality | Technique | Mean dose (cGy) | V5 (%) | V10 (%) | V15 (%) | V20 (%) |
|---|---|---|---|---|---|---|
| Left | Raised | 503.2 (223.1–1343.0) | 27.2 (10.2–68.3) | 21.1 (8.2–61.4) | 16.8 (6.5–56.0) | 7.5 (2.3–43.5) |
| Akimbo | 194.7 (143.2–1147.2) | 9.8 (5.7–66.5) | 6.9 (4.2–54.6) | 5.5 (3.3–42.9) | 3.1 (1.7–26.7) | |
| Right | Raised | 658.7 (492.3–751.2) | 39.8 (28.7–42.3) | 28.9 (18.2–32.6) | 24.6 (14.0–29.0) | 15.9 (2.5–20.8) |
| Akimbo | 422.3 (190.3–565.1) | 21.4 (9.0–32.9) | 15.8 (5.4–22.0) | 13.3 (3.8–18.2) | 7.6 (2.4–12.0) | |
| p-Value | Raised vs. Akimbo | 0.02 | 0.04 | 0.02 | 0.04 | 0.20 |
Values are expressed as median (range). cGy, centiGray; Vn, volume of organ (cm3) receiving at least n Gy.