从CT数据到带纤维走向的全心脏有限元模型的建立

doi:10.3969/j.issn.0258-8021.2020.02.07

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Abstract Cardiac computer model is a powerful tool for studying cardiac physiological/pathological function and treating patients with arrhythmias. The finite element model of the heart is the basis for building various heart models. Establishing personalized cardiac computer models from patients' clinical image data provides great convenience for clinical diagnosis and treatment. This paper developed a method for establishing a full-heart finite element model from human chest CT imaging data. It included following two steps: 1, establishment of a cardiac anatomical surface model by MIMICS based on chest CT images; 2, repairing the surface model with HyperMesh to obtain a finite element model of the heart entity. As the direction of myocardial fiber is closely related to the electrical/mechanical activity of the heart, after the reconstruction of cardiac anatomy from image data, we specifically investigated the addition of the myocardial fiber orientation. First, using the rule-based approach to add the direction of ventricular muscle fibers. Afterwards, based on rule-based approach, using structural tensor analysis to do the smoothing filtering. By this way, the atrial muscle fiber orientation was obtained. In order to verify the correctness of adding myocardial fibers, the fiber orientation of the special part in the heart was investigated. The angle between the direction of the myocardial fibers and the OX axis of the Bachmann′s bundle, the posterior left atrium, the superior posterior left atrium, and the interatrial groove was 4.97°±4.84° (Mean±Standard deviation), 111.99°±3.72°, 178.89°±3.73°, and 86.48°±4.01° respectively, consistent with myocardial fiber observations reported in the literature. The method proposed could construct a finite element model of the heart from the cardiac image data, which included myocardial fiber.

Key words： cardiac finite-element model myocardial fiber orientation structure tensor analysis rule-based approach

Received: 16 May 2018

PACS:

R318

Corresponding Authors: ^*E-mail: xiaomeiwu@fudan.edu.cn

About author:: ^#Member,Chinese Society of Biomedical Engineering

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	Articles by authors
	Qian Li
	Wang Jianfei
	Jin Lian
	Song Biao
	Huang Yanqi
	Zhu Honglei
	Yan Shengjie
	Wu Xiaomei

Cite this article:

Qian Li,Wang Jianfei,Jin Lian, et al. The Establishment of a Heart Model: From CT Data to Finite Element Model with Fiber Orientation[J]. Chinese Journal of Biomedical Engineering, 2020, 39(2): 180-189.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2020.02.07 OR http://cjbme.csbme.org/EN/Y2020/V39/I2/180

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