https://scholars.lib.ntu.edu.tw/handle/123456789/559879
標題: | An innovative numerical approach to resolve the pulse wave velocity in a healthy thoracic aorta model | 作者: | Yang A.-S. Wen C.-Y. Tseng L.-Y. Chiang C.-C. WEN-YIH TSENG HSI-YU YU |
公開日期: | 2014 | 出版社: | Informa Healthcare | 卷: | 17 | 期: | 5 | 起(迄)頁: | 461-473 | 來源出版物: | Computer Methods in Biomechanics and Biomedical Engineering | 摘要: | Aortic dissection and atherosclerosis are highly fatal diseases. The development of both diseases is closely associated with highly complex haemodynamics. Thus, in predicting the onset of cardiac disease, it is desirable to obtain a detailed understanding of the flowfield characteristics in the human cardiovascular circulatory system. Accordingly, in this study, a numerical model of a normal human thoracic aorta is constructed using the geometry information obtained from a phase-contrast magnetic resonance imaging (PC-MRI) technique. The interaction between the blood flow and the vessel wall dynamics is then investigated using a coupled fluid-structure interaction (FSI) analysis. The simulations focus specifically on the flowfield characteristics and pulse wave velocity (PWV) of the blood flow. Instead of using a conventional PC-MRI method to measure PWV, we present an innovative application of using the FSI approach to numerically resolve PWV for the assessment of wall compliance in a thoracic aorta model. The estimated PWV for a normal thoracic aorta agrees well with the results obtained via PC-MRI measurement. In addition, simulations which consider the FSI effect yield a lower predicted value of the wall shear stress at certain locations in the cardiac cycle than models which assume a rigid vessel wall. Consequently, the model provides a suitable basis for the future development of more sophisticated methods capable of performing the computer-aided analysis of aortic blood flows. ? 2012 ? 2012 Taylor & Francis. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896502409&doi=10.1080%2f10255842.2012.691476&partnerID=40&md5=ab550d144f9b315011f6f257fd3faf49 https://scholars.lib.ntu.edu.tw/handle/123456789/559879 |
ISSN: | 1025-5842 | DOI: | 10.1080/10255842.2012.691476 | SDG/關鍵字: | Acoustic wave velocity; Computer aided analysis; Computer simulation; Flow fields; Fluid structure interaction; Hemodynamics; Aortic dissections; Cardiovascular circulatory system; Geometry information; Haemodynamics; Numerical approaches; Phase contrast magnetic resonance imaging; Pulse wave velocity; Thoracic aorta; Blood vessels; adult; analysis; arterial wall thickness; article; blood flow velocity; computer model; fluid structure interaction analysis; geometry; human; male; normal human; nuclear magnetic resonance imaging; prediction; priority journal; pulse wave; shear stress; simulation; theoretical model; thoracic aorta; Adult; Aorta, Thoracic; Compliance; Hemodynamics; Humans; Magnetic Resonance Imaging; Male; Models, Anatomic; Pulse Wave Analysis |
顯示於: | 醫學系 |
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