de Oliveira Marcus V L, Wenzel Ann, Campos Paulo S F, Spin-Neto Rubens
1 Department of Health Technology and Biology, Federal Institute of Bahia, Salvador, Brazil.
2 Institute of Health Sciences, Department of Interactive, Processes of Organs and Systems, Federal University of Bahia, Salvador, Brazil.
Dentomaxillofac Radiol. 2017 Mar;46(3):20160329. doi: 10.1259/dmfr.20160329. Epub 2017 Feb 17.
To undertake a systematic review on quality assurance (QA) phantoms for CBCT imaging, including studies on the development and application of phantoms.
The MEDLINE (PubMed) bibliographic database was searched until May 2016 for studies evaluating the development and use of phantoms in CBCT image QA. The search strategy was restricted to English language publications using the following combined terms: (Cone Beam CT) OR (Cone Beam Computed Tomography) OR (Cone-Beam Computed Tomography) OR (CBCT) AND (quality OR phantom). It was assessed which of the six image quality parameters stated by the European Commission could be evaluated with each phantom and which of them actually were.
The search strategy yielded 37 studies, which had developed and used (25 studies) or only used (12 studies) a phantom in CBCT image QA. According to the literature, in 7 phantoms, it is possible to evaluate 4 or more image quality parameters while in 11 phantoms, merely 1 parameter can be evaluated. Only two phantoms permit the evaluation of the six image quality parameters stated by the European Commission. The parameters, which can most often be evaluated using a phantom, are image density values, spatial resolution and geometric accuracy. The SEDENTEXCT phantom was used most frequently. In two studies, all quality parameters suggested by the European Commission were evaluated.
QA phantoms rarely allow all image quality parameters stated by the European Commission to be evaluated. Furthermore, alternative phantoms, which allow all image quality parameters to be evaluated in a single exposure, even for a small field of view, should be developed.
对锥束计算机断层扫描（CBCT）成像的质量保证（QA）模体进行系统评价，包括模体的开发和应用研究。
检索MEDLINE（PubMed）文献数据库至2016年5月，以查找评估模体在CBCT图像质量保证中的开发和使用情况的研究。检索策略仅限于使用以下组合词的英文出版物：（锥束CT）或（锥束计算机断层扫描）或（锥束计算机断层摄影）或（CBCT）与（质量或模体）。评估了欧盟委员会规定的六个图像质量参数中哪些可以用每个模体进行评估，以及哪些实际上进行了评估。
检索策略产生了37项研究，这些研究在CBCT图像质量保证中开发并使用了（25项研究）或仅使用了（12项研究）模体。根据文献，在7个模体中，可以评估4个或更多图像质量参数，而在11个模体中，只能评估1个参数。只有两个模体允许评估欧盟委员会规定的六个图像质量参数。最常使用模体评估的参数是图像密度值、空间分辨率和几何精度。SEDENTEXCT模体使用最为频繁。在两项研究中，对欧盟委员会建议的所有质量参数进行了评估。
QA模体很少能对欧盟委员会规定的所有图像质量参数进行评估。此外，应开发替代模体，即使对于小视野，也能在一次曝光中评估所有图像质量参数。
