Validation of the volumetric measurement of a simulated maxillary alveolar bone defect using cone-beam computed tomography
| Autor: | Grant T McIntyre, D.A. Thomson, Alison Menhinick, Peter A. Mossey, Toby Gillgrass, S. Ivekovic, C.P. Kasaven |
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| Rok vydání: | 2012 |
| Předmět: |
Cone beam computed tomography
Scanner X-ray microtomography business.industry Reproducibility of Results Image processing X-Ray Microtomography Cone-Beam Computed Tomography Skull medicine.anatomical_structure Imaging Three-Dimensional Otorhinolaryngology Maxilla medicine Image Processing Computer-Assisted Humans Imaging science Oral Surgery Nuclear medicine business Dental alveolus |
| Zdroj: | The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association. 50(6) |
| ISSN: | 1545-1569 |
| Popis: | Objective To determine the accuracy of volumetric measurement of a simulated alveolar bone defect using cone-beam computed tomography (CBCT) scans. Design Laboratory-based observational study. Setting University dental teaching hospital. Methods Scans of a dried skull with an artificially created maxillary bone defect. Main Outcome Measures The skull was scanned using an i-CAT CBCT scanner (Imaging Sciences International, Hatfield, PA) at 0.2 mm resolution. The superior and inferior aspects of the void were identified, and the volume was calculated by three-dimensional (3D) computational analysis of the CBCT scan using an algorithm created with MATLAB software (The Mathworks Inc., R2009a, Natick, MA). The skull was then scanned using micro computed tomography (micro-CT) at 0.0934 mm resolution, and the volume of the defect was determined using the Studio Max 2.2 program (Volume Graphics, 2012, Heidelberg, Germany). The process was repeated two additional times, and the volumes were compared using a two-sample t test ( P < .05). To determine the interobserver reproducibility of the identification of the superior and inferior aspects of the defect, the slices chosen to represent these extremities were selected by four separate observers and the data assessed using an F-test ( P < .05). Results The interobserver reproducibility of the identification of the superior and inferior boundaries of the defect was good ( P = .18). The volumes computed from the i-CAT CBCT images were 4.11% lower than those computed from the micro-CT images; however, the difference was not statistically significant ( P = .71). Conclusions 3D volumetric measurement of simulated alveolar bone defects using i-CAT CBCT scans is similar to the volumes determined using micro-CT. |
| Databáze: | OpenAIRE |
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