Guido de Jong1, Manon Tolhuisen2, Jene Meulstee3, Ferdi van der Heijden4, Erik van Lindert2, Wilfred Borstlap3, Thomas Maal3, Hans Delye2. 1. Department of Neurosurgery, RadboudUMC, Nijmegen, The Netherlands; MIRA Institute for BMT and TM, Enschede, The Netherlands. Electronic address: guido.dejong@radboudumc.nl. 2. Department of Neurosurgery, RadboudUMC, Nijmegen, The Netherlands. 3. Department of Oral and Maxillofacial Surgery, RadboudUMC, Nijmegen, The Netherlands. 4. MIRA Institute for BMT and TM, Enschede, The Netherlands.
Abstract
INTRODUCTION: Radiation-free 3D post-operative sequential follow-up in craniosynostosis is hindered by the lack of consistent markers restricting evaluation to subjective comparison. However, using the computed cranial focal point (CCFP), it is possible to perform correct sequential image superposition and objective evaluation. We used this technique for mean volume and shape change evaluation of the head utilizing 3D photos after endoscopically assisted trigonocephaly surgery. METHODS: We performed a mean head shape and volume evaluation on age grouped 3D photos (n = 86) of children who underwent endoscopically assisted strip craniectomy with helmet therapy. We used CT-scans of healthy children as reference. We performed a mean shape evolution analysis and calculated the anterior fossa to total volume ratio (A/T-ratio). The volume- and A/T-ratio pattern were compared with the reference group. RESULTS: The mean anterior fossa volume evolved from 336 ml (33.4% A/T-ratio) pre-surgery to 664 ml (36.0% A/T-ratio) at 37-48 months post-surgery. Both groups have a near similar volume- and A/T-ratio pattern over time. The first 18 months show a predominant growth around the resected metopic suture. Between 18 and 24 months we observed mostly anterior orbital rim growth. From 24 months till 36-48 months the head grows predominantly at the temporal area. The least outward growth was observed at the temporal bones. CONCLUSION: Using a novel technique we were able to objectively evaluate head shape and volume using stereophotogrammetry after endoscopically assisted strip craniectomy. The A/T-ratio and volume growth pattern of endoscopically treated patients is near identical to that of the normal reference group.
INTRODUCTION: Radiation-free 3D post-operative sequential follow-up in craniosynostosis is hindered by the lack of consistent markers restricting evaluation to subjective comparison. However, using the computed cranial focal point (CCFP), it is possible to perform correct sequential image superposition and objective evaluation. We used this technique for mean volume and shape change evaluation of the head utilizing 3D photos after endoscopically assisted trigonocephaly surgery. METHODS: We performed a mean head shape and volume evaluation on age grouped 3D photos (n = 86) of children who underwent endoscopically assisted strip craniectomy with helmet therapy. We used CT-scans of healthy children as reference. We performed a mean shape evolution analysis and calculated the anterior fossa to total volume ratio (A/T-ratio). The volume- and A/T-ratio pattern were compared with the reference group. RESULTS: The mean anterior fossa volume evolved from 336 ml (33.4% A/T-ratio) pre-surgery to 664 ml (36.0% A/T-ratio) at 37-48 months post-surgery. Both groups have a near similar volume- and A/T-ratio pattern over time. The first 18 months show a predominant growth around the resected metopic suture. Between 18 and 24 months we observed mostly anterior orbital rim growth. From 24 months till 36-48 months the head grows predominantly at the temporal area. The least outward growth was observed at the temporal bones. CONCLUSION: Using a novel technique we were able to objectively evaluate head shape and volume using stereophotogrammetry after endoscopically assisted strip craniectomy. The A/T-ratio and volume growth pattern of endoscopically treated patients is near identical to that of the normal reference group.
Authors: Guido de Jong; Elmar Bijlsma; Jene Meulstee; Myrte Wennen; Erik van Lindert; Thomas Maal; René Aquarius; Hans Delye Journal: Sci Rep Date: 2020-09-18 Impact factor: 4.379