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首页> 外文期刊>Radiotherapy and oncology: Journal of the European Society for Therapeutic Radiology and Oncology >In-gantry or remote patient positioning? Monte Carlo simulations for proton therapy centers of different sizes
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In-gantry or remote patient positioning? Monte Carlo simulations for proton therapy centers of different sizes

机译：门内或远程患者定位？不同大小的质子治疗中心的蒙特卡洛模拟

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Purpose: We estimated the potential advantage of remote positioning (RP) vs. in-room positioning (IP) for a proton therapy facility in terms of patient throughput. Materials and methods: Monte Carlo simulations of facilities with one, two or three gantries were performed. A sensitivity analysis was applied by varying the imaging and setup correction system (ICS), the speed of transporters (for RP) and beam switching time. Possible advantages of using three couches (for RP) or of switching the beam between fields was also investigated. Results: For a single gantry facility, an average of 20% more patients could be treated using RP: ranging from +45%, if a fast transporter and slow ICS were simulated, to -14% if a slow transporter and fast ICS was simulated. For two gantries, about 10% more patients could be treated with RP, ranging from +32% (fast transporter, slow ICS) to -12% (slow transporter, fast ICS). The ability to switch beam between fields did not substantially influence the throughput. In addition, the use of three transporters showed increased delays and therefore a slight reduction of the fractions executables. For three gantries, RP and IP showed similar results. Conclusions: The advantage of RP vs. IP strongly depends on ICS and the speed of the transporters. For RP to be advantageous, reduced transport times are required. The advantage of RP decreases with increasing number of gantries.
机译：目的：我们就患者吞吐量而言，估计了质子治疗设施相对于室内定位（IP）的远程定位（RP）的潜在优势。材料和方法：对带有一，两或三个龙门架的设施进行了蒙特卡洛模拟。通过改变成像和设置校正系统（ICS），传输器的速度（对于RP）和光束切换时间来进行灵敏度分析。还研究了使用三个沙发床（用于RP）或在场之间切换光束的可能优势。结果：对于单个龙门机构，使用RP可以平均多治疗20％的患者：如果模拟了快速运输工具和慢速ICS，则为+ 45％;如果模拟了缓慢运输工具和快速ICS，则为-14％。 。对于两个门架，可以用RP治疗的患者大约多10％，范围从+ 32％（快速转运，慢速ICS）到-12％（慢速转运，快ICS）。在场之间切换光束的能力基本上不会影响吞吐量。此外，使用三个转运蛋白显示出增加的延迟，因此，分数可执行文件略有减少。对于三个龙门，RP和IP显示了相似的结果。结论：RP与IP的优势在很大程度上取决于ICS和转运体的速度。为了使RP具有优势，需要减少运输时间。 RP的优势随着龙门架数量的增加而降低。

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