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适用于国产远距钴治疗机(Bhabhatron II)的Eclipse治疗计划系统中各向异性分析算法的实现与验证

Implementation and Validation of Anisotropic Analytical Algorithm in Eclipse Treatment Planning System for Indigenous Telecobalt Machine (Bhabhatron II).

作者信息

Hajare Raghavendra, Ali Md Basit, Sreelakshmi K K, Kumar M Anil, Kalita Rituraj, Mahantshetty Umesh M

机构信息

Department of Radiation Oncology, Homi Bhabha Cancer Hospital and Research Centre, Visakhapatnam, Andhra Pradesh, India.

出版信息

J Med Phys. 2022 Jan-Mar;47(1):50-56. doi: 10.4103/jmp.jmp_95_21. Epub 2022 Mar 31.

DOI:10.4103/jmp.jmp_95_21
PMID:35548036
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9084584/
Abstract

BACKGROUND

The photon dose calculation model anisotropic analytical algorithm (AAA) available with eclipse integrated treatment planning system (TPS) (Varian) supports telecobalt dose calculation from Version 13.6 onward. Formerly, pencil beam convolution (PBC) was used for modeling telecobalt machines. Eclipse TPS no longer supports PBC dose calculation algorithm in v13.6 and above. The AAA dose calculation model is a three-dimensional PBC/superposition algorithm. Its configuration is based on Monte-Carlo-determined basic physical parameters that are tailored to measured clinical beam data.

AIM

The study investigated the feasibility of clinical implementation of AAA in Eclipse TPS for Bhabhatron II.

MATERIALS AND METHODS

The indigenous telecobalt machine, Bhabhatron II, was configured as a generic machine because an inbuilt machine model for the same was not available in Varian Eclipse TPS algorithm library. In such a scenario, it was necessary to evaluate and validate dosimetric parameters of the TPS because improper tailoring would cause errors in dose calculations. Beam data measurements of the machine were carried out which were used for configuration of the algorithm.

RESULT

After successful configuration, a variety of plans created in TPS were executed on the machine and subsequently evaluated.

CONCLUSION

From this study, we concluded that AAA-based dose calculation in TPS is very well suited for accurate dose calculations for telecobalt machine and can be implemented for clinical use.

摘要

背景

瓦里安(Varian)公司的Eclipse一体化治疗计划系统(TPS)中可用的光子剂量计算模型——各向异性分析算法(AAA),从13.6版本起支持远距离钴治疗剂量计算。以前,铅笔束卷积(PBC)用于模拟远距离钴治疗机。Eclipse TPS在13.6及更高版本中不再支持PBC剂量计算算法。AAA剂量计算模型是一种三维PBC/叠加算法。其配置基于蒙特卡罗确定的基本物理参数,并针对实测临床射束数据进行了调整。

目的

本研究探讨了在Eclipse TPS中对Bhabhatron II实施AAA临床应用的可行性。

材料与方法

国产远距离钴治疗机Bhabhatron II被配置为通用机器,因为瓦里安Eclipse TPS算法库中没有其内置机器模型。在这种情况下,有必要评估和验证TPS的剂量学参数,因为调整不当会导致剂量计算错误。对该机器进行了射束数据测量,并将其用于算法配置。

结果

成功配置后,在TPS中创建的各种计划在机器上执行,随后进行评估。

结论

通过本研究,我们得出结论,TPS中基于AAA的剂量计算非常适合远距离钴治疗机的精确剂量计算,可用于临床。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/ecad4b52be9b/JMP-47-50-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/8227ea275145/JMP-47-50-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/4101c47d45c7/JMP-47-50-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/2cfa8d4a3646/JMP-47-50-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/ecad4b52be9b/JMP-47-50-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/8227ea275145/JMP-47-50-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/4101c47d45c7/JMP-47-50-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/2cfa8d4a3646/JMP-47-50-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f9a5/9084584/ecad4b52be9b/JMP-47-50-g004.jpg

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