Optic canal analysis in syndromic craniosynostosis: volumetric and surface area validation study using different measurement modalities

Hariri, Firdaus and Zainudin, Nur Afiqah Aina and Anuar, Ahmad Muizz Shariful and Ibrahim, Norliza and Abdullah, Norli Anida and Aziz, Izhar Abdul and Ramli, Norlisah and Abdul Rahman, Zainal Ariff Abdul (2021) Optic canal analysis in syndromic craniosynostosis: volumetric and surface area validation study using different measurement modalities. Journal of Craniofacial Surgery, 32 (1). pp. 355-359. ISSN 1049-2275, DOI https://doi.org/10.1097/SCS.0000000000006981.

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Abstract

Background: In syndromic craniosynostosis (SC), unlike persistent corneal irritation due to severe exophthalmos and increased intracranial pressure, optic canal (OC) stenosis has been scarcely reported to cause visual impairment. This study aimed to validate the OC volumetric and surface area measurement among SC patients. Methods: Sixteen computed tomography scan of SC patients (8 months-6 years old) were imported to Materialise Interactive Medical Image Control System (MIMICS) and Materialise 3-matics software. Three-dimensional (3D) OC models were fabricated, and linear measurements were obtained. Mathematical formulas were used for calculation of OC volume and surface area from the 3D model. The same measurements were obtained from the software and used as ground truth. Data normality was investigated before statistical analyses were performed. Wilcoxon test was used to validate differences of OC volume and surface area between 3D model and software. Results: The mean values for OC surface area for 3D model and MIMICS software were 103.19 mm(2) and 31.27 mm(2), respectively, whereas the mean for OC volume for 3D model and MIMICS software were 184.37 mm(2) and 147.07 mm(2), respectively. Significant difference was found between OC volume (P = 0.0681) and surface area (P = 0.0002) between 3D model and software. Conclusion: Optic canal in SC is not a perfect conical frustum thus making 3D model measurement and mathematical formula for surface area and volume estimation not ideal. Computer software remains the best modality to gauge dimensional parameter and is useful to elucidates the relationship of OC and eye function as well as aiding intervention in SC patients.

Item Type: Article
Funders: Universiti Malaya [BKS081-2017]
Uncontrolled Keywords: 3D printing; CT scan; Optic canal; Syndromic craniosynostosis
Subjects: R Medicine > RD Surgery
Divisions: Centre for Foundation Studies in Science
Faculty of Dentistry > Dept of Oral & Maxillofacial Surgery
Faculty of Medicine > Biomedical Imaging Department
Depositing User: Ms Zaharah Ramly
Date Deposited: 08 Jul 2022 01:41
Last Modified: 08 Jul 2022 01:41
URI: http://eprints.um.edu.my/id/eprint/34062

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