Page 29 - ARNM-1-1

Advances in Radiotherapy
& Nuclear Medicine Mathematic modeling of PDD for FF and FFF in photon

Table 2. The deviation of calculated and measured S at different square field size of Varian in FF beams for photon energies 6 and 10 MV
c
Field size 6 MV S c FF Varian 6 MV FF 6 MV modeling/ 10 MV S c FF Varian 10 MV FF 10 MV modeling/
(cm×cm) modeling measurement measurement error (%) modeling measurement measurement error (%)
4 0.9709 0.9690 0.8005 0.9739 0.9670 0.0072
5 0.9778 0.9727 0.5204 0.9802 0.9742 0.0062
6 0.9836 0.9810 0.2612 0.9854 0.9808 0.0047
7 0.9885 0.9875 0.1007 0.9898 0.9869 0.0029
8 0.9928 0.9921 0.0692 0.9936 0.9923 0.0013
9 0.9966 0.9960 0.0590 0.9970 0.9970 0.0000
10 1.0000 1.0000 0.0000 1.0000 1.0000 0.0000
12 1.0059 1.0080 −0.2051 1.0053 1.0071 −0.0018
14 1.0110 1.0130 −0.1997 1.0098 1.0120 −0.0022
16 1.0154 1.0170 −0.1607 1.0137 1.0160 −0.0023
18 1.0193 1.0210 −0.1710 1.0171 1.0201 −0.0029
20 1.0227 1.0236 −0.0836 1.0202 1.0234 −0.0031
22 1.0259 1.0270 −0.1060 1.0230 1.0261 −0.0030
24 1.0288 1.0290 −0.0183 1.0256 1.0288 −0.0031
26 1.0315 1.0310 0.0472 1.0280 1.0310 −0.0029
28 1.0340 1.0330 0.0939 1.0302 1.0331 −0.0028
30 1.0363 1.0345 0.1728 1.0322 1.0349 −0.0026
35 1.0415 1.0385 0.2873 1.0368 1.0394 −0.0025
40 1.0460 1.0399 0.5871 1.0408 1.0429 −0.0020
Abbreviation: FF: Filtering filter.

Table 3. The deviation of calculated and measured S at different square field size of Varian in FFF beams for photon energy 6 and 10 MV
c
Field size 6 MV S c FFF Varian 6 MV FFF 6 MV modeling/ 10 MV S c FFF Varian 10 MV FFF 10 MV modeling/
(cm×cm) modeling measurement measurement error (%) modeling measurement measurement error (%)
4 0.880 0.889 −0.987 0.935 0.926 0.997
5 0.914 0.914 −0.012 0.954 0.946 0.828
6 0.939 0.936 0.308 0.967 0.962 0.565
7 0.959 0.956 0.269 0.978 0.974 0.414
8 0.975 0.973 0.174 0.987 0.984 0.268
9 0.988 0.987 0.131 0.994 0.993 0.084
10 1.000 1.000 0.000 1.000 1.000 0.000
12 1.019 1.021 −0.162 1.010 1.012 −0.187
14 1.035 1.038 −0.300 1.018 1.021 −0.278
16 1.048 1.052 −0.398 1.025 1.028 −0.310
18 1.059 1.063 −0.393 1.030 1.034 −0.343
20 1.068 1.073 −0.429 1.035 1.039 −0.352
22 1.077 1.081 −0.384 1.040 1.043 −0.323
24 1.084 1.088 −0.332 1.043 1.047 −0.340
26 1.091 1.094 −0.257 1.047 1.050 −0.298
28 1.097 1.099 −0.147 1.050 1.053 −0.286
30 1.103 1.104 −0.086 1.053 1.055 −0.206
35 1.115 1.113 0.217 1.059 1.060 −0.094
40 1.126 1.121 0.428 1.064 1.064 0.016
Abbreviation: FFF: Flattening filter free.
Volume 1 Issue 1 (2023) 6 https://doi.org/10.36922/arnm.0314