Author:

Keywords:

Science & Technology, Life Sciences & Biomedicine, Radiology, Nuclear Medicine & Medical Imaging, Cone Beam CT, Dentomaxillofacial, Accuracy, Mandible, STEREOLITHOGRAPHIC SURGICAL GUIDES, IMPLANT PLACEMENT, LINEAR MEASUREMENTS, GEOMETRIC ACCURACY, SPIRAL CT, IMAGES, QUALITY, RELIABILITY, Cone-Beam Computed Tomography, Humans, In Vitro Techniques, Radiography, Dental, Digital, Tomography Scanners, X-Ray Computed, Tomography, X-Ray Computed, 1103 Clinical Sciences, Nuclear Medicine & Medical Imaging, 3202 Clinical sciences

Abstract:

AIM: 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. MATERIALS AND 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 0.137mm and for CBCT were 0.282, 0.225, 0.165, 0.386 and 0.206mm for the i-CAT, Accuitomo, NewTom, Scanora and Galileos, respectively. CONCLUSION: The results show that the accuracy of CBCT 3D surface model reconstructions is somewhat lower but acceptable comparing to MSCT from the gold standard.