Accuracy of Linear Measurements Made on Cone Beam Computed Tomography Scans at Different Magnifications
| Autor: | Aisan Ghaznavi, Dara Ghaznavi, Solmaz Valizadeh, Zahra Vasegh, Muna Al-Shuhayeb |
|---|---|
| Rok vydání: | 2019 |
| Zdroj: | Journal of Contemporary Medical Sciences. 5:274-278 |
| ISSN: | 2413-0516 2415-1629 |
| DOI: | 10.22317/jcms.v5i5.684 |
| Popis: | Objective: This study aimed to evaluate the accuracy of linear measurements made on CBCT (New Tom VGi) scans with different image magnifications. Methods: Forty-two titanium pins were inserted into seven dry sheep mandibles. Lengths of the pins were measured using a digital caliper with 0.01 mm readability, and the mandibles were radiographed using a CBCT unit. After reconstruction of CBCT images, three experienced radiologists measured the length and diameter of titanium pins at100%, 200% and 400% magnifications. Accuracy of measurements was analyzed using descriptive statistics and one-way analysis of variance (ANOVA) P0.05). The mean differences of linear measurements from the actual diameters of pins were 0.2206 mm, 0.2063 mm and 0.1984 mm at 100%, 200% and 400% magnifications, respectively (P>0.05). Inter observer reliability of pin length measurements was estimated to be0.285, 0.707 and 0.479 at 100%, 200% and 400%magnifications, respectively. Inter observer reliability of pin diameter measurements was 0 .078, 0.469 and 0.587 at 100%, 200% and 400%magnifications, respectively. Conclusion: Based on the results, image magnification does not affect the accuracy of linear measurements made on CBCT scans. Inter observer reliability of pin length measurements was good at 200% magnification, while it was below the acceptable range at other magnifications. For measurement of pin diameters, this index was below the acceptable range at all magnifications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|