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An in vitro comparison of subjective image quality of panoramic views acquired via 2D or 3D imaging

Pittayapat, P.; Galiti, D.; Huang, Y.; Dreesen, K.; Schreurs, M.; Couto Souza, P.; Bullen, Izabel Regina Fischer Rubira de; Westphalen, F. H.; Pauwels, R.; Kalema, G.; Willems, G.; Jacobs, R.
Fonte: Springer-Verlag; Berlin Publicador: Springer-Verlag; Berlin
Tipo: Artigo de Revista Científica
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Objectives: The objective of this study is to compare subjective image quality and diagnostic validity of cone-beam CT (CBCT) panoramic reformatting with digital panoramic radiographs. Materials and methods: Four dry human skulls and two formalin-fixed human heads were scanned using nine different CBCTs, one multi-slice CT (MSCT) and one standard digital panoramic device. Panoramic views were generated from CBCTs in four slice thicknesses. Seven observers scored image quality and visibility of 14 anatomical structures. Four observers repeated the observation after 4 weeks. Results: Digital panoramic radiographs showed significantly better visualization of anatomical structures except for the condyle. Statistical analysis of image quality showed that the 3D imaging modalities (CBCTs and MSCT) were 7.3 times more likely to receive poor scores than the 2D modality. Yet, image quality from NewTom VGi® and 3D Accuitomo 170® was almost equivalent to that of digital panoramic radiographs with respective odds ratio estimates of 1.2 and 1.6 at 95% Wald confidence limits. A substantial overall agreement amongst observers was found. Intra-observer agreement was moderate to substantial. Conclusions: While 2D-panoramic images are significantly better for subjective diagnosis...