ED BP
4.1.1 Dimensional accuracy of CBCT
One aspect of imaging which is important to all aspects of clinical use of dental CBCT is dimensional (geometric) accuracy. Clearly, however, this is of particular importance in certain applications, such as implantology and orthodontics where accurate
quantitative information is required. There are numerous publications on linear accuracy of dental CBCT and some dealing with angular measurements. Although these fell outside the strict inclusion criteria of the systematic review of diagnostic accuracy, the Panel conducted a separate review process for these studies. While the search methodology for this element of the review may have omitted some research of relevance, the Panel identified 50 publications where the primary focus of studies was judged to be aspects of measurement accuracy (Agbaje et al 2007; Al-Ekrish et al 2011; Al-Rawi et al 2010; Ballrick et al 2008; Baumgaertel et al 2009; Berco et al 2009; Brown et al 2009; Cattaneo et al 2008; Cevidanes et al 2005; Chen et al 2008;
Damstra et al 2010; Eggers et al 2008; Eggers et al 2009; Fatemitabar et al 2010;
Fourie et al 2010; Grauer et al 2010; Gribel et al. 2011; Hassan et al. 2009; Hilgers et al 2005; Kamburoğlu et al. 2010; Kobayashi et al 2004; Kumar et al 2007; Kumar et al 2008; Lagravère et al. 2008; Lamichane et al 2009; Lascala et al 2004; Liu et al 2010;
Loubele et al 2008; Ludlow et al 2007; Luk et al 2011; Lund et al 2009; Marmulla et al 2005; Mischkowski et al 2007; Moerenhout et al 2009; Moreira et al. 2009; Moshiri et al 2007; Naitoh et al 2009; Peck et al 2006; Periago et al 2008; Pinsky et al 2006;
Razavi et al 2010; Sakabe et al 2007; Sherrard et al 2010; Stratemann et al 2008;
Suomalainen et al 2008; Tsutsumi et al 2011; Van Assche et al 2007; Van Elslande et al 2010; van Vlijmen et al 2009; Veyre-Goulet et al 2008).
These studies encompassed a good range of dental CBCT equipment manufacturers and models. The results suggest that differences between CBCT-derived
measurements and the reference standard appear to be small and are unlikely to be clinically significant. Laboratory studies do not, however, take account of minor patient movements which, while difficult to perceive in terms of poorer image quality, might contribute to added discrepancy between the image dimensions and reality. The methodologies and the objectives of these studies were usually very different, so that it remains difficult to make valid comparisons between equipment. Clearly, as new equipment is introduced, these kinds of efficacy studies should continue to be performed. It would, however, be valuable if a standard battery of tests using a commercially available phantom were prospectively adopted so that comparisons of equipment could be most usefully made.
4.1.2 References
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