Golestan University of Medical Sciences Repository

Accuracy of linear measurement using cone-beam computed tomography at different reconstruction angles

Nikneshan, S. and Aval, S.H. and Bakhshalian, N. and Shahab, S. and Mohammadpour, M. and Sarikhani, S. (2014) Accuracy of linear measurement using cone-beam computed tomography at different reconstruction angles. Imaging Science in Dentistry, 44 (4). pp. 257-262. ISSN 22337822 (ISSN)

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Abstract

Purpose: This study was performed to evaluate the effect of changing the orientation of a reconstructed image on the accuracy of linear measurements using cone-beam computed tomography (CBCT). Materials and Methods: Forty-two titanium pins were inserted in seven dry sheep mandibles. The length of these pins was measured using a digital caliper with readability of 0.01 mm. Mandibles were radiographed using a CBCT device. When the CBCT images were reconstructed, the orientation of slices was adjusted to parallel (i.e., 0°), +10°, +12°, -12°, and -10° with respect to the occlusal plane. The length of the pins was measured by three radiologists, and the accuracy of these measurements was reported using descriptive statistics and one-way analysis of variance (ANOVA); p<0.05 was considered statistically significant. Results: The differences in radiographic measurements ranged from -0.64 to +0.06 at the orientation of -12°, -0.66 to -0.11 at -10°, -0.51 to +0.19 at 0°, -0.64 to +0.08 at +10°, and -0.64 to +0.1 at +12°. The mean absolute values of the errors were greater at negative orientations than at the parallel position or at positive orientations. The observers underestimated most of the variables by 0.5-0.1 mm (83.6%). In the second set of observations, the reproducibility at all orientations was greater than 0.9. Conclusion: Changing the slice orientation in the range of -12°to +12°reduced the accuracy of linear measurements obtained using CBCT. However, the error value was smaller than 0.5 mm and was, therefore, clinically acceptable. © 2014 by Korean Academy of Oral and Maxillofacial Radiology.

Item Type: Article
Additional Information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Imaging Sci. Dent. [Field not mapped to EPrints] AD - Department of Dental and Maxillofacial Radiology, School of Dentistry, Shahid Beheshti University of Medical SciencesTehran, Iran [Field not mapped to EPrints] AD - Department of Advanced Periodontology, School of Dentistry, University of Southern CaliforniaLos Angeles, United States [Field not mapped to EPrints] AD - Department of Dental and Maxillofacial Radiology, School of Dentistry, Shahed University of Medical SciencesTehran, Iran [Field not mapped to EPrints] AD - Department of Dental and Maxillofacial Radiology, School of Dentistry, Qazvin University of Medical SciencesQazvin, Iran [Field not mapped to EPrints] AD - Department of Dental and Maxillofacial Radiology, School of Dentistry, Golestan University of Medical SciencesGolestan, Iran [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled Keywords: Cone-beam computed tomography, Dental implants, Dimensional measurement accuracy
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
موارد کلی
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 14 Apr 2015 09:24
Last Modified: 09 May 2015 04:13
URI: http://eprints.goums.ac.ir/id/eprint/1792

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