Wyniki wyszukiwania - BazTech

1

Methods of reconstructing complex multi-structural anatomical objects with RP techniques

Kudasik T., Miechowicz S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2016

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Vol. 64, nr 2

315--323

EN

This article presents reconstruction methods applied to a (geometrically and physically) complex structural object with the use of RP and RT techniques. The methods are innovative due to their hybrid - multi-model and multi-material - approach to reconstruction, as well as the application of multiple technologies. An experimental analysis was conducted to verify the feasibility of rapid prototyping (RP) techniques in the reconstruction of complex internal structures using materials of diverse properties. Some RP techniques offer the possibility of discriminating between diverse objects through the use of different colours. Such models are well-suited for diagnostic purposes, for better visualisation of complex clinical problems, pathological alterations, etc. Nevertheless, they fail to fully reflect physical and mechanical properties of objects, which renders them useful in experimental analysis only to a limited extent. Their basic drawback is that they merely reflect geometrical features of the examined object. The methods discussed in the present article enable modelling multi-object structures in a single process based on the PolyJet Matrix technology and materials of different physical properties by means of a hybrid method. The article also describes the process of modelling complex anatomical structures of soft tissues and bones using models of the maxilla and the mandible as examples. The study is based on data acquired through standard computed tomography (CT). In addition, the article addresses selected aspects of CT acquisition, generation of numerical models composed of several anatomical structures (objects) and fabricating physical multi-object models.

2

Modele medyczne do badań doświadczalnych

Miechowicz S., Kudasik T., Markowska O.

Pomiary Automatyka Kontrola

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2014

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R. 60, nr 4

203--206

PL

W artykule przedstawiono zagadnienia związane z wykorzystaniem modeli medycznych wykonanych technikami szybkiego prototypowania do badań doświadczalnych metodą elastooptyczną. Przeprowadzono analizę porównawczą przydatności wybranych materiałów w badaniach elastooptycznych metodą światła przechodzącego. Przedstawiono przykładowe wyniki analizy doświadczalnej wybranych modeli struktur anatomicznych. Potwierdzono przydatność wybranych metod modelowania medycznego w zastosowaniach eksperymentalnych.

EN

For the analysis of complex medical issues, besides numerical methods, one can simultaneously make use of experimental tests to verify the obtained results. In the case of an experimental test it is necessary to make physical models and to carry out verifying tests on them. The physical model of the examined object can be fabricated with Rapid Prototyping technology from 3D-CAD virtual model. The Physical Rapid Prototyping model enables identifying the medical problem more efficiently and reconstructing the pathological changes clearly for experimental tests. Based on the medical model of real anatomical structures it is possible to manufacture experimental models that reconstruct complex inner structures very precisely. It allows avoiding simplified assumptions to experimental analysis. The photoelastic method can be used to verify the numerical analysis of the stress distribution in spatial models. The experimental research can be performed on real objects or their models. The photoelastic method is mainly used in cases where the stress distribution needs to be tested in those object areas that are difficult to access or the inner areas of structures. Some aspects of application of Rapid Prototyping (RP) methods to photoelastic tests are presented in this paper. The comparative analysis of the usefulness of available RP resin models applied to photoelastic experiment is performed. The process of preparation of an experimental model for the photoelastic method is described. The usefulness of the chosen RP resins for experimental tests is confirmed.

3

Stereolitography - the choice for medical modelling

Marciniec A., Miechowicz S.

Acta of Bioengineering and Biomechanics

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2004

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Vol. 6, nr 1

13-23

EN

Rapid development of manufacturing technology allows producing complex, physical 3D models based on a very accurate medical data. The aim of Rapid Prototyping (RP) is to reproduce most exactly "3D reality" within a solid, physical model. This paper presents the meaning of medical modelling, the process of manufacturing with the selected RP method (stereolitography), advantages of medi cal modelling to doctors and patients. It also reviews briefly the most common Rapid Prototyping methods.