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Developing a tool to measure objectively the rib hump from an instantaneous 3D scanning in a full upright position. Results of 50 scoliosis before and after plaster cas

Authors
Journal
Scoliosis
1748-7161
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Volume
5
Identifiers
DOI: 10.1186/1748-7161-5-s1-o13
Keywords
  • Oral Presentation
Disciplines
  • Medicine

Abstract

Developing a tool to measure objectively the rib hump from an instantaneous 3D scanning in a full upright position. Results of 50 scoliosis before and after plaster cas ORAL PRESENTATION Open Access Developing a tool to measure objectively the rib hump from an instantaneous 3D scanning in a full upright position. Results of 50 scoliosis before and after plaster cas Jean Claude de Mauroy*, Julien David, Pascal Genevois, Frédéric Barral, Jean Jacques Lalain From 7th International Conference on Conservative Management of Spinal Deformities Montreal, Canada. 20-22 May 2010 Introduction Comprehensive evaluation of the morphology of the spine and of the whole body is essential in order to cor- rectly manage patients suffering from progressive idio- pathic scoliosis. The Adams test implies a forward bending of the trunk and radiological examinations are performed in an upright position. The aim of this study is to explore the possibility to obtain a clinical measure of the rib hump in an upright position like the Cobb angle. Orten scanning system is a full 3D instantaneous measurement device in an upright position, working with structured light projection. Initially developed to avoid the plaster cast moulding, this system gives a full 3D digital representation of scoliosis. [1] The software offers many versatile and flexible solutions needed to study the patient 3D model. Material and methods The data from AAOP file are transcribed on an Excel spreadsheet. The cylindrical coordinates are transformed into Cartesian coordinates (X, Y, Z). The model is viewed through two graphs, one reproducing the 3D model and the other to view points of a selected horizontal section. Each horizontal plane contains 90 points. We create a fourth axis Y′ with the same origin than Y, but defining with Y a variable and controlled alpha angle by a counter “alpha position”. The coordi- nates of points according to this new axis are deter- mined by: Y′p = Yp cos (alpha) + Zp sin (alpha). Looking back along the

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