Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/14035
Título: Wall expansion assessment of an intracranial aneurysm model by a 3D digital image correlation system measurement
Autor: Rodrigues, R.O.
Pinho, D.
Bento, D.
Lima, R.
Ribeiro, J.E.
Palavras-chave: Aneurysm assessment
FEA
3D Digital image correlation
Validation
Data: 2016
Citação: Rodrigues, R.O.; Pinho, D.; Bento, D.; Lima, R. Ribeiro, J.E. (2016) - Wall expansion assessment of an intracranial aneurysm model by a 3D digital image correlation system measurement. Measurement: Journal of the International Measurement Confederation. ISSN 0263-2241. 88, p.262-270
Resumo: Intracranial aneurysm is a local dilatation of an intracranial artery with high risk of rupture and death. Although it is generally accepted that the weakening of the arterial wall is the main cause for the rupture of an aneurysm, it still no consensus about the reasons for its creation, expansion and rupture. In particular, what is the role played by the blood flow in these phenomena. In this way, the aim of this work is the in vitro mechanical assessment of the wall expansion, namely the displacements, deformations and strains occurring in a saccular intracranial aneurysm model, when subjected to different flow rates. To obtain new insights into the mechanisms involved in the aneurysm rupture, a 3D-VicTM Digital Image Correlation System was used and validated with a finite element analysis. The wall expansion results have revealed that the displacements, deformations and principal strains are directly related to the internal pressure caused by the fluid on the wall of the aneurism. These findings were especially observed in the weakened areas of the aneurysm model, where the wall was thinner. Furthermore, the technique used in this study has shown to be a potential method to validate numerical simulations of aneurysms, allowing the future performance of more complex and realistic haemodynamic studies.
Peer review: yes
URI: http://hdl.handle.net/10198/14035
ISSN: 0263-2241
Aparece nas colecções:DTM - Artigos em Revistas Indexados ao ISI/Scopus

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