文章基本信息

标题：Correlation between gray values of cone-beam computed tomograms and Hounsfield units of computed tomograms: A systematic review and meta-analysis
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作者：Abirami Selvaraj ; Ravindra Kumar Jain ; Ravleen Nagi 等
期刊名称：Imaging Science in Dentistry
印刷版ISSN：2233-7822
出版年度：2022
卷号：52
期号：2
页码：133-140
DOI：10.5624/isd.20210274
语种：English
出版社：Korean Academy of Oral and Maxillofacial Radiology
摘要：Purpose The aim of this review was to systematically analyze the available literature on the correlation between the gray values (GVs) of cone-beam computed tomography (CBCT) and the Hounsfield units (HUs) of computed tomography (CT) for assessing bone mineral density. Materials and Methods A literature search was carried out in PubMed, Cochrane Library, Google Scholar, Scopus, and LILACS for studies published through September 2021. In vitro, in vivo, and animal studies that analyzed the correlations GVs of CBCT and HUs of CT were included in this review. The review was prepared according to the PRISMA checklist for systematic reviews, and the risk of bias was assessed using the Quality Assessment of Diagnostic Accuracy Studies tool. A quantitative analysis was performed using a fixed-effects model. Results The literature search identified a total of 5,955 studies, of which 14 studies were included for the qualitative analysis and 2 studies for the quantitative analysis. A positive correlation was observed between the GVs of CBCT and HUs of CT. Out of the 14 studies, 100% had low risks of bias for the domains of patient selection, index test, and reference standards, while 95% of studies had a low risk of bias for the domain of flow and timing. The fixed-effects meta-analysis performed for Pearson correlation coefficients between CBCT and CT showed a moderate positive correlation (r=0.669; 95% CI, 0.388 to 0.836; P<0.05). Conclusion The available evidence showed a positive correlation between the GVs of CBCT and HUs of CT.
关键词：enTomography, X-ray ComputedCone-Beam Computed TomographyBone DensityReproducibility of Results