Quality control in cone-beam computed tomography (CBCT) EFOMP-ESTRO-IAEA protocol (summary report)
Quality control in cone-beam computed tomography (CBCT) EFOMP-ESTRO-IAEA protocol (summary report)
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DOI：
10.1016/j.ejmp.2017.05.069
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发表时间：
2017-07-01
影响因子：
3.4
通讯作者：
Zervides, Costas
中科院分区：
文献类型：
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作者：
Gala, Hugo de las Heras;Torresin, Alberto;Zervides, Costas
本文提出的指南的目的是统一所有类型的锥形束计算机断层扫描（CBCT）系统中图像质量评价和辐射输出的测试参数。CBCT的应用已扩展到牙科和介入放射学、引导手术和放射治疗。所选择的测试提供了客观评估性能和监测成像链稳定性的手段。从所有相关协会收集经验，以达成一个共识，是严格的和有益的做法，该指南建议评估图像质量的均匀性，几何精度，体素密度值（或亨氏单位，如果可用），噪声，低对比度分辨率和空间分辨率测量。这些测试通常需要使用体模和评估软件。辐射输出可以用安装在管壳上的比释动能面积积计来确定。或者，可以使用连接到平板的固态剂量计和简单的几何关系来计算等中心的剂量。如果辐射输出或图像质量偏离预期值，或超过给定系统的记录行动水平，则可能需要进行更深入的系统分析（使用传统测试）和纠正性维护工作。(C)2017由Elsevier Ltd代表Associazione Italiana di Fisica Medica出版。
The aim of the guideline presented in this article is to unify the test parameters for image quality evaluation and radiation output in all types of cone-beam computed tomography (CBCT) systems. The applications of CBCT spread over dental and interventional radiology, guided surgery and radiotherapy. The chosen tests provide the means to objectively evaluate the performance and monitor the constancy of the imaging chain. Experience from all involved associations has been collected to achieve a consensus that is rigorous and helpful for the practice.The guideline recommends to assess image quality in terms of uniformity, geometrical precision, voxel density values (or Hounsfield units where available), noise, low contrast resolution and spatial resolution measurements. These tests usually require the use of a phantom and evaluation software. Radiation output can be determined with a kerma-area product meter attached to the tube case. Alternatively, a solid state dosimeter attached to the flat panel and a simple geometric relationship can be used to calculate the dose to the isocentre. Summary tables including action levels and recommended frequencies for each test, as well as relevant references, are provided.If the radiation output or image quality deviates from expected values, or exceeds documented action levels for a given system, a more in depth system analysis (using conventional tests) and corrective maintenance work may be required. (C) 2017 Published by Elsevier Ltd on behalf of Associazione Italiana di Fisica Medica.