Table 2.
Ep (MeV) |
r90 (mm) |
m (mm) |
Δr90 (mm) |
Δm (mm) |
ΔDmax (%) |
---|---|---|---|---|---|
250 | 250 | 40 | 0.04 | 0.09 | 2.2 |
250 | 250 | 100 | 0.40 | 0.75 | 1.6 |
250 | 250 | 160 | 0.42 | 5.44 | 2.0 |
250 | 207 | 100 | 0.90* | 7.70* | – |
225 | 206 | 40 | 1.00 | 1.10 | 3.0 |
225 | 206 | 100 | 0.50 | 1.50 | 2.0 |
225 | 206 | 140 | 0.80 | 3.00 | 1.7 |
225 | 166 | 100 | 1.50* | 7.80* | – |
200 | 165 | 160 | 2.17 | 0.01 | 1.5 |
200 | 165 | 100 | 2.15 | 2.46 | 1.9 |
200 | 165 | 140 | 2.27 | 1.97 | 1.8 |
200 | 138 | 60 | 1.60* | 2.24* | – |
180 | 137 | 40 | 2.05 | 1.89 | 2.3 |
180 | 137 | 60 | 2.12 | 0.59 | 2.0 |
180 | 137 | 100 | 2.22 | 1.35 | 2.5 |
180 | 111 | 60 | 1.13* | 6.67* | – |
160 | 110 | 20 | 2.05 | 0.17 | 3.0 |
160 | 110 | 40 | 2.03 | 2.76 | 2.8 |
160 | 110 | 60 | 2.02 | 3.47 | 3.0 |
160 | 110 | 80 | 2.07 | 2.13 | 2.2 |
160 | 110 | 100 | 2.11 | 0.23 | 1.0 |
160 | 85 | 60 | 1.06 | 3.47 | 3.0 |
140 | 84 | 40 | 0.61 | 0.78 | 1.9 |
140 | 74 | 60 | 0.69 | 1.30 | 2.9 |
120 | 63 | 40 | 1.07 | 1.85 | 1.9 |
120 | 63 | 20 | 1.24 | 0.12 | 2.6 |
100 | 43 | 30 | 1.17 | 0.04 | 2.3 |
100 | 35 | 20 | 1.28 | 1.02 | 2.5 |
Δr90 is the absolute difference between the simulated and the measured ranges at the distal 90% dose location, Δm is the absolute difference in SOBP width (Δr90 and Δm values with an ‘*’ were compared to the nominal values), and ΔDmax is the maximum absolute dose difference relative to the dose at the center of the SOBP.