Use the external radiotherapy StarTrack detector to study the electron beam profile.

IF 0.8 4区医学 Q3 MEDICINE, GENERAL & INTERNAL Journal of the Pakistan Medical Association Pub Date : 2024-10-01 DOI:10.47391/JPMA-BAGH-16-18

Safa Sami Hassan

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引用次数: 0

Abstract

Objective: To assess the electron beam dose verification, and to investigate the dependability and stability of the Startrack two-dimensional array.

Methods: The is cross-secional study was conducted from January to April 2021 at the Baghdad Centre for Radiotherapy and Nuclear Medicine, Baghdad Medical City, Baghdad, Iraq. Quality assurance measurements were made using a StarTrack two-dimensional detector on an electron beam with an energy of 12MeV at 1.5cm depth for field sizes 6cm×6cm and 14cm×14cm. The detector was positioned 100cm from the source to the surface of the linear accelerator infinity. Testing was done using the International Electrotechnical Commissioning protocol.

Results: There was a significant difference between field sizes 6cmx6cm and 14cmx14cm (-4.97±0.83, -2.01±0.68, respectively) (p<0.05). The beam profile measurements of penumbra, flatness and symmetry were within limits ±2 cm, and ±2 cm, 2%, respectively. The percentage of output dose curve against distance showed instability in crossline for 6cm x 6cm and 14cm x 14cm field size.

Conclusions: The output dose was found to be above the tolerance level, and should be corrected before patient treatment for 12MeV energy electron beam therapy.

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使用体外放射治疗 StarTrack 探测器研究电子束轮廓。

目的：评估电子束剂量验证，研究星轨二维阵列的可靠性和稳定性：评估电子束剂量验证，研究Startrack二维阵列的可靠性和稳定性：这项跨学科研究于 2021 年 1 月至 4 月在伊拉克巴格达巴格达医疗城巴格达放射治疗与核医学中心进行。使用 StarTrack 二维探测器对能量为 12MeV 的电子束进行了质量保证测量，测量深度为 1.5 厘米，场尺寸为 6 厘米×6 厘米和 14 厘米×14 厘米。探测器安装在距离源 100 厘米的直线加速器无穷远表面。测试采用国际电工委员会的调试协议进行：结果：6 厘米×6 厘米和 14 厘米×14 厘米的磁场尺寸之间存在明显差异（分别为-4.97±0.83、-2.01±0.68）（p 结论：输出剂量超过了线性加速器的辐射剂量：发现输出剂量高于耐受水平，在对患者进行 12MeV 能量电子束治疗前应进行校正。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Pakistan Medical Association Medicine-General Medicine

CiteScore

1.10

自引率

11.10%

发文量

983

审稿时长

3-6 weeks

期刊介绍： Primarily being a medical journal, JPMA publishes scholarly research focusing on the various fields in the areas of health and medical education. It publishes original research describing recent advances in health particularly clinical studies, clinical trials, assessments of pathogens of diagnostic importance, medical genetics and epidemiological studies. Review articles highlighting importance of various issues in the domain of public health, drug research and medical education are also accepted. As a leading journal of South Asia, JPMA remains cognizant of the recent advances in the rapidly growing fields of biomedical sciences, it invites and encourages scholars to write short reviews and invited editorials on the emerging issues. We particularly aim to promote health standards of developing countries by encouraging manuscript submissions on issues affecting the public health and health delivery services.