Table 3 Central-axis depth dose characteristics for 15 × 15 cm2 cone. Central-axis depth dose characteristics for 7 MeV, 9 MeV, and 9 MeV with 1 cm bolus of 15 × 15 cm2 cone. X con indicates X-ray contamination that is extracted from R p plus 2 cm
From: Design and evaluation of electron beam energy degraders for breast boost irradiation
Nominal energy (MeV) | Surface dose (%) | d max (cm) | R 90 (cm) | R 80 (cm) | R 50 (cm) | R p (cm) | E 0 (MeV) | X con (%) |
|---|---|---|---|---|---|---|---|---|
7 | 89.7 | 1.12 | 1.74 | 1.99 | 2.52 | 3.31 | 5.87 | 1.1 |
9 | 80.5 | 2.03 | 2.72 | 2.98 | 3.55 | 4.38 | 8.27 | 1.1 |
9 with bolus | 91.1 | 1.03 | 1.72 | 1.98 | 2.55 | 3.32 | 5.94 | - |