Personalized assessment of craniosynostosis via statistical shape modeling |
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| Affiliation: | 1. Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, Washington, DC, USA;2. Signal Processing Department, University of Sevilla, Sevilla, Spain;3. Computer Science Department, San Francisco State University, San Francisco, CA, USA;4. Division of Plastic and Reconstructive Surgery, Children’s National Medical Center, Washington, DC, USA;5. Departments of Radiology and Pediatrics, School of Medicine and Health Sciences, George Washington University, Washington, DC, USA;1. Department of Orthodontics (Head: Prof. Dr. Philipp Meyer-Marcotty), University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany;2. Department of Orthodontics (Head: Prof. Dr. Angelika Stellzig-Eisenhauer), University Hospital of Wuerzburg, Pleicherwall 2, 97070, Wuerzburg, Germany;3. Department of Neurosurgery, Section of Pediatric Neurosurgery, University Hospital of Wuerzburg, Germany;4. Department of Oral and Maxillofacial Surgery, University Hospital of Wuerzburg, Germany;1. Erasmus Medical Center, Maxillofacial Surgery, Rotterdam, The Netherlands;2. Great Ormond Street Hospital, London, United Kingdom;3. Medical Physics Department, University College London, London, United Kingdom;4. Queen Victoria Hospital, East Grinstead, United Kingdom;1. Oxford Craniofacial Unit, Oxford University Hospitals NHS Trust, John Radcliffe Hospital, Oxford OX3 9DU, UK;2. Department of Neuroradiology, Oxford University Hospitals NHS Trust, John Radcliffe Hospital, Oxford UK;1. Department of Oral and Maxillofacial Surgery, University Hospital Heidelberg, Heidelberg, Germany;2. Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany |
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| Abstract: | We present a technique for the computational analysis of craniosynostosis from CT images. Our fully automatic methodology uses a statistical shape model to produce diagnostic features tailored to the anatomy of the subject. We propose a computational anatomy approach for measuring shape abnormality in terms of the closest case from a multi-atlas of normal cases. Although other authors have tackled malformation characterization for craniosynostosis in the past, our approach involves several novel contributions (automatic labeling of cranial regions via graph cuts, identification of the closest morphology to a subject using a multi-atlas of normal anatomy, detection of suture fusion, registration using masked regions and diagnosis via classification using quantitative measures of local shape and malformation). Using our automatic technique we obtained for each subject an index of cranial suture fusion, and deformation and curvature discrepancy averages across five cranial bones and six suture regions. Significant differences between normal and craniosynostotic cases were obtained using these characteristics. Machine learning achieved a 92.7% sensitivity and 98.9% specificity for diagnosing craniosynostosis automatically, values comparable to those achieved by trained radiologists. The probability of correctly classifying a new subject is 95.7%. |
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| Keywords: | Craniosynostosis Computational anatomy Shape analysis Computer-assisted diagnosis Graph-cut segmentation |
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