Journal of Radiation Research and Radiation Processing, Volume. 42, Issue 2, 020302(2024)
Monte Carlo simulation of errors in gantry angle and multi-leaf collimators on intensity modulated arc therapy radiation dose
Figures & Tables(7)
Fig. 1. Influence of MLCs random error (a) and system error (b) on the mean Dmin value of the target area
Fig. 2. Randomized errors in MLCs lead to differences in Dmean dose for patients with PTV (a) and OAR ((b)~(d))
Fig. 3. Differences in Dmean dosage of patients with PTV (a) and OAR ((b)~(d)) caused by MLCs system errors
Fig. 4. Effects of gantry angle error on minimum mean dose in the target area
Fig. 5. Dmean percentage difference between patient's PTV (a) and OAR ((b)~ (d)) due to gantry positioning error
Table 1.
MLC errors leading to dose deviation for PTV and OAR with reference plan View tableView in ArticleTable 1.
MLC errors leading to dose deviation for PTV and OAR with reference plan 误差
Error
一侧叶片 Oneside 两侧叶片 Twosides 1 mm 2 mm 0~2 mm -2 mm -2 mm 1 mm 2 mm PTV Dmax 1.50±0.47 2.34±0.82 1.14±0.59 0.05±0.38 0.41±0.53 0.19±0.39 0.11±0.43 PTV Dmin 3.00±0.94 4.83±2.33 3.00±1.09 -0.95±2.30 -0.07±1.53 -0.22±1.26 -0.93±2.25 PTV Dave 1.12± 0.24 2.15± 0.46 1.15±0.25 -0.20±0.06 -0.03±0.07 -0.07±0.14 -0.27±0.28 脑干DmaxBrainstem Dmax 1.53 ±0.47 2.89 ±1.01 1.52 ±0.43 -0.49±0.93 -0.36±0.72 -0.08±0.64 -0.14±1.03 晶体DmaxLens Dmax 4.37±2.45 8.07±3.23 5.31±3.18 1.90±6.99 0.58±3.16 0.44±4.49 0.40±7.88 视神经Dmax Optic nerve Dmax 2.65±1.24 4.98±1.92 2.75±1.20 -0.13±2.60 0.61±2.26 -0.30±1.09 -0.40±2.06
Table 2.
Gantry errors leading to dose deviation for PTV and OAR with reference plan View tableView in ArticleTable 2.
Gantry errors leading to dose deviation for PTV and OAR with reference plan 误差
Error
机架 Gantry -2° -1° -0.5° 0.5° 1° 2° -2° ~ 2° PTV Dmax 0.03± 0.26 0.09 ±0.27 0.17 ±0.39 0.20 ±0.35 0.34 ±0.37 0.12 ±0.40 0.28 ±0.28 PTV Dmin 0.03±1.84 0.36±1.41 0.57±1.05 0.56±0.75 0.69±0.53 0.54±1.17 0.78±1.25 PTV Dave -0.01±0.11 0.02±0.15 0.04±0.16 -0.03±0.17 -0.01±0.15 -0.02±0.13 0.09±0.13 脑干DmaxBrainstem Dmax 0.12±0.51 0.44±0.44 0.34±0.34 -0.20±0.33 -0.03±0.44 0.28±0.42 0.30±1.01 晶体DmaxLens Dmax -0.43±9.05 -1.24±4.32 -1.11±3.78 -0.16±4.69 -0.58±7.51 0.84±13.08 -1.41±4.31 视神经Dmax Optic nerve Dmax 0.52±1.88 0.13±1.78 -0.08±1.72 -1.33±2.13 -0.87±2.27 -0.90±2.89 0.71±1.15
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Ruohui ZHANG, Yulan GAO, Wenwen BAI, Huipeng MENG, Keqiang WANG, Zifeng CHI. Monte Carlo simulation of errors in gantry angle and multi-leaf collimators on intensity modulated arc therapy radiation dose[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(2): 020302
Paper Information
Category: Research Articles
Received: Nov. 15, 2023
Accepted: Jan. 16, 2024
Published Online: May. 28, 2024
The Author Email: Wenwen BAI (白文文), Zifeng CHI (迟子锋)
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