ESTRO 2024 - Abstract Book

S4594

Physics - Optimisation, algorithms and applications for ion beam treatment planning

ESTR0 2024

Results:

The new controller -time-efficient significantly reduced the dynamic delivery time by maintaining the highest possible speed within each tolerance window given by static delivery time and tolerance window size compared to the controller prototype across all the disease sites. The lost time is reduced from 88.8±53.2% via the controller -prototype , to 20.5±8.0% for the controller -time-efficient (P<0.05) (Table 1).

Table 1 : Summary of static irradiation time, total dynamic delivery time, and lost time of the five tested disease sites.

Lost time (s)

Lost time (s) controller prototype

Dynamic delivery time controller time-efficient

Dynamic delivery Time (s) controller prototype

controller -time-efficient

Static Irradiation Time (s)

(s)

Disease sites

(relative %)

(relative %)

head neck

449.0

1218.3

539.1

769.3 (171.3%)

90.1 (20.1%)

liver

228.4

299.0

251.5

70.6(30.9%)

23.1(10.1%)

lung

142.6

234.0

168.1

91.4(64.1%)

25.5(17.9%)

prostate

219.6

451.5

290.3

231.9(105.6%)

70.7(32.2%)

brain

115.2

198.4

140.8

83.2(72.2%)

25.6(22.2%)

Conclusion:

We developed a novel proton arc gantry system controller that can significantly improve the treatment delivery efficiency of proton arc therapy within the mechanical limitation.