Title: An in vitro comparison of subjective image quality of panoramic views acquired via 2D or 3D imaging
Authors: Pittayapat, Pisha ×
Galiti, D
Huang, Yan
Dreesen, Karoline
Schreurs, Marc
Couto Souza, P
Rubira-Bullen, IRF
Westphalen, FH
Pauwels, Ruben
Kalema, George
Willems, Guy
Jacobs, Reinhilde #
Issue Date: Jan-2013
Publisher: Springer
Series Title: Clinical Oral Investigations vol:17 issue:1 pages:293-300
Article number: DOI 10.1007/s00784-012-0698-0
Abstract: 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. Intraobserver agreement was moderate to substantial.

Conclusions: While 2D-panoramic images are significantly better for subjective diagnosis, 2/3 of the 3D-reformatted panoramic images are moderate or good for diagnostic purposes.

Clinical relevance: Panoramic reformattings from particular CBCTs are comparable to digital panoramic images concerning the overall image quality and visualization of anatomical structures. This clinically implies that a 3D-derived panoramic view can be generated for diagnosis with a recommended 20-mm slice thickness, if CBCT data is a priori available for other purposes.
ISSN: 1432-6981
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Orthodontics
Oral Imaging
Clinical Residents Dentistry
Leuven Biostatistics and Statistical Bioinformatics Centre (L-BioStat)
× corresponding author
# (joint) last author

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