A comparative evaluation of Cone Beam Computed Tomography (CBCT) and Multi-Slice CT (MSCT). Part II: On 3D model accuracy.
OBJECTIVE
The study aim was to compare the geometric accuracy of three-dimensional (3D) surface model reconstructions between five Cone Beam Computed Tomography (CBCT) scanners and one Multi-Slice CT (MSCT) system.


METHODS
A dry human mandible was scanned with five CBCT systems (NewTom 3G, Accuitomo 3D, i-CAT, Galileos, Scanora 3D) and one MSCT scanner (Somatom Sensation 16). A 3D surface bone model was created from the six systems. The reference (gold standard) 3D model was obtained with a high resolution laser surface scanner. The 3D models from the five systems were compared with the gold standard using a point-based rigid registration algorithm.


RESULTS
The mean deviation from the gold standard for MSCT was 0.137 mm and for CBCT were 0.282, 0.225, 0.165, 0.386 and 0.206 mm for the i-CAT, Accuitomo, NewTom, Scanora and Galileos, respectively.


CONCLUSIONS
The results show that the accuracy of CBCT 3D surface model reconstructions is somewhat lower but acceptable comparing to MSCT from the gold standard.
Faculty of Medicine, Catholic University of Leuven, Oral Imaging Centre, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Leuven, Belgium. Xin.Liang@med.kuleuven.be
Xin
X
Liang
Ivo
I
Lambrichts
Yi
Y
Sun
Kathleen
K
Denis
Bassam
B
Hassan
Limin
L
Li
Ruben
R
Pauwels
Reinhilde
R
Jacobs
D054893:Cone-Beam Computed Tomography; D006801:Humans; D066298:In Vitro Techniques; D008334:Mandible / Q000000981:diagnostic imaging*; D019252:Radiography, Dental, Digital; D015898:Tomography Scanners, X-Ray Computed; D014057:Tomography, X-Ray Computed