PurposeThe purpose of this paper is to generate facsimiled rapid prototyping (RP) models for medical analysis that demands an answer about the accuracy of medical models.Design/methodology/approachThe RP technology for anatomical biomodeling is the accurate RP procedure of milling and joining, a method that is used to produce high accurate functional prototypes. To fabricate medical prototypes with RP, there is a need to get appropriate data information. Along that process, image data will be taken by computer‐tomography (CT) images as data basis. The key process is to generate a digital three‐dimensional (3D) model that represents the original object as best as possible. To be able to make a statement about the accuracy of such a model the necessary parameters run along a CT scan are of interest.FindingsA case study using a generated test model is presented in order to show the process accuracy in relation to the chosen scan parameters. The quality of editing CT images for a 3D‐reconstruction as a necessary pre‐process for RP is, to an important degree, based on the used scan parameters.Originality/valueThis paper represents a cutting‐edge analysis that gives answers about the constrictive accuracy that is achievable for medical RP models.
-The complex anatomy of the nasal airways is an anatomy that is difficult to understand from conventional twodimensional anatomy images. The objective of the present study was to establish the methods and parameters necessary to provide three-dimensional triangulated models for Rapid Prototyping. Anatomical data derive from scanned medical images made with computerized tomography. Different data sets of nasal airway structures were segmented and 3D reconstructed. With high-resolution scans, accurate segmentation of the structures was possible. The reconstructed and triangulated models were evaluated in order to determine triangulation parameters that are needed for Rapid Prototyping models. Gaining insight in the interplay of parameters necessary for modeling complex anatomies for Rapid Prototyping enables to provide accurate Rapid Prototyping models for biomedical engineering applications.
Kurzfassung Die Entwicklung von Nutzfahrzeugen ist durch drei Problemstellungen gekennzeichnet. Zum einen ist es notwendig, die an der Wirtschaftlichkeit der Fahrzeuge ausgerichteten Kaufkriterien zu berücksichtigen. Zweitens findet eine Betrachtung der Produktmerkmale hauptsächlich auf Komponenten- bzw. Systemebene statt. Und drittens verkürzen sich die Entwicklungszyklen zunehmend. Hierbei ist eine besondere Vorgehensweise zur Durchführung der Innovationsaktivitäten erforderlich. Technische Neuerungen mit Konzeptbeeinflussung können nur in einem vom Gesamtfahrzeug abhängigen Zeitfenster eingebracht werden, nicht konzeptrelevante Themen allerdings auch in laufende Fahrzeugbaureihen. Ein neuer Prozessansatz zum Management der Innovationsvorhaben unter der Berücksichtigung verschiedener Zeithorizonte wird im Bereich der schweren Nutzfahrzeuge bei DaimlerChrysler erprobt. Dieser integriert die Organisation und Strukturierung der Innovationsthemen sowie die notwendigen Schnittstellen. Das Vorgehen soll im Rahmen dieses Artikels aufgezeigt und erläutert werden.
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