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Session: Surgery & Intervention
Session starts: Friday 27 January, 14:00
Presentation starts: 14:45
Room: Room 531

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Abdullah Thabit (Erasmus MC)
ohamed Benmahdjoub (Erasmus MC)
Marie-lise van Veelen (Erasmus MC)
Wiro Niessen (Erasmus MC)
Eppo Wolvius (Erasmus MC)
Theo van Walsum (Erasmus MC)

Abstract:
Purpose: In minimally invasive spring-assisted craniectomy, surgeons plan the surgery by manually locating the cranial sutures. However, this approach is prone to error. Augmented reality (AR) could be used to visualize the cranial sutures and assist in the surgery planning. The purpose of this work is to develop an AR-based system to visualize cranial sutures, and to assess the accuracy and usability of using AR-based navigation for surgical guidance in minimally invasive spring-assisted craniectomy. Methods: An AR system was developed that consists of an electromagnetic (EM) tracking system linked with a Microsoft HoloLens. The system was used to conduct a phantom study with two skull phantoms. For each phantom, five sutures were annotated and visualized on the skull surface. Twelve participants assessed the system. For each participant, model alignment using six anatomical landmarks was performed, followed by the participant delineation of the visualized sutures. At the end, the participants filled a System Usability Scale (SUS) questionnaire. For evaluation, a model alignment using ten registration landmarks was performed and the delineated sutures were digitized and compared to the CT-annotated sutures. Furthermore, the time spent during the delineation task was assessed. Results: For a total of 120 delineated sutures, the distance of the annotated sutures to the planning reference was 2.4 ± 1.2 mm. The average delineation time per suture was 13 ± 5 s. For the system usability questionnaire, an average SUS score of 73 was obtained. Conclusion: The developed AR-system has good accuracy (average 2.4 mm distance) and could be used in the OR.