A comprehensive characterization of a multi-axis ion chamber array for use as a linear accelerator QC device

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology Pub Date : 2025-08-30 DOI:10.1016/j.net.2025.103873

Lorenzo Radici , Valeria Casanova Borca , Alessandro Garello , Edoardo Petrucci , Jacopo Franzino , Marina Paolini , Maria Rosa La Porta , Massimo Pasquino

{"title":"A comprehensive characterization of a multi-axis ion chamber array for use as a linear accelerator QC device","authors":"Lorenzo Radici , Valeria Casanova Borca , Alessandro Garello , Edoardo Petrucci , Jacopo Franzino , Marina Paolini , Maria Rosa La Porta , Massimo Pasquino","doi":"10.1016/j.net.2025.103873","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>To investigate the behavior of a high-resolution multi-axis ion chamber array in measuring key parameters within a linear accelerator quality control (QC) program.</div></div><div><h3>Methods</h3><div>The detector consists of a double-layer ionization chamber matrix detection plate and it can acquire relative dose profile in inline and crossline direction. It was tested for reproducibility, dose rate dependence, linearity, and angular/field dependence. Its ability to measure flatness, symmetry, and dose profiles for photon (6/10 MV, FF/FFF) and electron (6/9 MeV) beams was compared against water phantom measurements. The ability to detect multileaf collimator (MLC) positioning errors was also analyzed.</div></div><div><h3>Results</h3><div>Short and long-term reproducibility were within 0.3 %, dose rate dependence was under 0.2 %, and the dose response was linear. The angular dependence was below 1 % for gantry angles between 0° and ±30°. Profile comparisons showed a maximum difference of 1.5 % over beam flat area. Average deviations were minimal for flatness (<0.2 %), symmetry (<0.4 %), and penumbra (<0.7 mm). Depth dose differences did not exceed 1 %. The system can detect MLC positioning error lower than 1 mm.</div></div><div><h3>Conclusions</h3><div>The high resolution multi-axis ion chamber array is a reliable tool for verifying beam parameters in a QC program, demonstrating high accuracy in profile evaluation.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103873"},"PeriodicalIF":2.6000,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Engineering and Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1738573325004413","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Background

To investigate the behavior of a high-resolution multi-axis ion chamber array in measuring key parameters within a linear accelerator quality control (QC) program.

Methods

The detector consists of a double-layer ionization chamber matrix detection plate and it can acquire relative dose profile in inline and crossline direction. It was tested for reproducibility, dose rate dependence, linearity, and angular/field dependence. Its ability to measure flatness, symmetry, and dose profiles for photon (6/10 MV, FF/FFF) and electron (6/9 MeV) beams was compared against water phantom measurements. The ability to detect multileaf collimator (MLC) positioning errors was also analyzed.

Results

Short and long-term reproducibility were within 0.3 %, dose rate dependence was under 0.2 %, and the dose response was linear. The angular dependence was below 1 % for gantry angles between 0° and ±30°. Profile comparisons showed a maximum difference of 1.5 % over beam flat area. Average deviations were minimal for flatness (<0.2 %), symmetry (<0.4 %), and penumbra (<0.7 mm). Depth dose differences did not exceed 1 %. The system can detect MLC positioning error lower than 1 mm.

Conclusions

The high resolution multi-axis ion chamber array is a reliable tool for verifying beam parameters in a QC program, demonstrating high accuracy in profile evaluation.

查看原文本刊更多论文

用于线性加速器QC装置的多轴离子室阵列的综合表征

研究高分辨率多轴离子室阵列在直线加速器质量控制（QC）程序中测量关键参数的行为。方法采用双层电离室基质检测板，在直线和交叉方向上获取相对剂量谱。测试了重现性、剂量率依赖性、线性度和角/场依赖性。它测量光子（6/10 MV, FF/FFF）和电子（6/9 MeV）光束的平整度、对称性和剂量谱的能力与水幻影测量进行了比较。分析了多叶准直器（MLC）定位误差检测能力。结果该方法的短期和长期重现性在0.3%以内，剂量率依赖性在0.2%以内，剂量效应呈线性关系。龙门角度在0°和±30°之间的角度依赖性低于1%。剖面比较表明，在梁平面面积上最大差异为1.5%。平整度（< 0.2%）、对称性（< 0.4%）和半影（<0.7 mm）的平均偏差最小。深度剂量差异不超过1%。结论高分辨率多轴离子室阵列是一种可靠的光束参数验证工具，在轮廓评估中具有较高的准确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nuclear Engineering and Technology 工程技术-核科学技术

CiteScore

4.80

自引率

7.40%

发文量

431

审稿时长

3.5 months

期刊介绍： Nuclear Engineering and Technology (NET), an international journal of the Korean Nuclear Society (KNS), publishes peer-reviewed papers on original research, ideas and developments in all areas of the field of nuclear science and technology. NET bimonthly publishes original articles, reviews, and technical notes. The journal is listed in the Science Citation Index Expanded (SCIE) of Thomson Reuters. NET covers all fields for peaceful utilization of nuclear energy and radiation as follows: 1) Reactor Physics 2) Thermal Hydraulics 3) Nuclear Safety 4) Nuclear I&C 5) Nuclear Physics, Fusion, and Laser Technology 6) Nuclear Fuel Cycle and Radioactive Waste Management 7) Nuclear Fuel and Reactor Materials 8) Radiation Application 9) Radiation Protection 10) Nuclear Structural Analysis and Plant Management & Maintenance 11) Nuclear Policy, Economics, and Human Resource Development