Genesis Care, Perth, Australia.
Genesis Care, Sydney, Australia.
Phys Eng Sci Med. 2021 Sep;44(3):667-675. doi: 10.1007/s13246-021-01014-1. Epub 2021 May 25.
Elekta AQUA v2.02 software (Gantry Runout isocenter test) was investigated as a tool for verification of kilovoltage to megavoltage gantry radiation isocenter coincidence. AQUA reported megavoltage (6 MV) isocenter was independent of field size over the range 5 cm × 5 cm to 20 cm × 20 cm. For the 10 cm × 10 cm field size, standard deviation in AQUA reported 3D megavoltage (6MV) isocenter over ten consecutive deliveries was less than 0.04 mm for any axis. Compared to the full AQUA test delivery (Gantry Runout), the shorter AQUA test version (Gantry Runout short) gave a root mean square MV isocenter (± 1 SD) difference of 0.18 mm ± 0.08. Across 7 machines, root mean square differences between AQUA and PIPS PRO reported MV isocenter (for 6 MV and 6 MV FFF beams) was 0.1 mm ± 0.1 mm, with most of the difference observed in the gun-target (Y-axis). AQUA 6 MV isocentre position was offset to gantry relative to Elekta XVI customer acceptance test (CAT) workflow by 0.25 mm to 0.52 mm. For 6 MV FFF beams, AQUA reported an MV isocenter of between 0.27 and 0.39 mm offset to target relative to Elekta CAT.
AQUA v2.02 软件（龙门架偏摆等中心测试）被研究作为验证千伏级至兆伏级龙门架辐射等中心重合度的工具。AQUA 报告称，在 5cm×5cm 至 20cm×20cm 的范围内，兆伏级（6MV）等中心与射野大小无关。对于 10cm×10cm 的射野大小，AQUA 报告的连续十次 3D 兆伏级（6MV）等中心的标准偏差在任何轴上都小于 0.04mm。与完整的 AQUA 测试交付（龙门架偏摆）相比，较短的 AQUA 测试版本（龙门架偏摆短）给出的均方根 MV 等中心（±1SD）差异为 0.18mm±0.08mm。在 7 台机器上，AQUA 和 PIPS PRO 报告的 MV 等中心（用于 6MV 和 6MVFFF 射束）的均方根差异为 0.1mm±0.1mm，大部分差异出现在枪靶（Y 轴）。与 Elekta XVI 客户验收测试（CAT）工作流程相比，AQUA 的 6MV 等中心位置相对于龙门架的偏移为 0.25mm 至 0.52mm。对于 6MVFFF 射束，AQUA 报告的 MV 等中心相对于 Elekta CAT 靶心的偏移在 0.27mm 至 0.39mm 之间。
