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Test-retest validation of a cranial deformity index in unilateral coronal craniosynostosis

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  • Emilie Robertson
  • Peter Kwan
  • Gorman Louie
  • Pierre Boulanger
  • Daniel Aalto

Abstract

Unilateral coronal craniosynostosis (UCS) affects many infants resulting in abnormalities affecting the forehead and orbits. As a result, the deformity caused by UCS is very noticeable and there are several surgical treatment options available to normalize the head shape. However, there is a lack of consistently used outcome measures, resulting in difficulty assessing surgical outcomes and on-going debate over optimal treatments. Current techniques to quantify deformity in UCS are cumbersome, provide limited information, or are based on subjective assessments. In this study, a cranial deformity index was developed to quantify abnormality at the frontal bones for UCS that is accessible, user-friendly, and generates objective surface distance measurements. The cranial deformity index is defined as the Euclidean distance at the point of the largest deviation between the deformed skull compared to a reference skull. In addition, the index was successfully used to quantify post-operative changes in a single case of UCS that underwent corrective surgery. The reproducibility of the index was assessed using test-retest reliability and was demonstrated to be highly reproducible (ICC = 0.93). A user-friendly measurement index that is based on open-source software may be a valuable tool for surgical teams. In addition, this information can augment the consultation experience for patients and their families.

Suggested Citation

  • Emilie Robertson & Peter Kwan & Gorman Louie & Pierre Boulanger & Daniel Aalto, 2020. "Test-retest validation of a cranial deformity index in unilateral coronal craniosynostosis," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 23(15), pages 1247-1259, November.
    • Handle: RePEc:taf:gcmbxx:v:23:y:2020:i:15:p:1247-1259
    DOI: 10.1080/10255842.2020.1795143
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