Parametric modeling method for ascending aorta, aortic arch and three branches of ascending aorta and aortic arch

Abstract

The invention discloses a parametric modeling method for ascending aorta, an aortic arch and three branches of the ascending aorta and the aortic arch, and belongs to the field of biological 3D printing modeling. The method comprises the following steps: firstly, acquiring a CT medical image of a patient, importing data into image analysis software, and adjusting various display parameters; employing a thresholding function and a region growing function of software, and drawing a target blood vessel section of the patient and a peripheral constraint organ tissue mask in combination with manualcorrection; dividing peripheral organs and tissues of the artery of the patient into sternum, thoracic vertebra, superior vena cava, trachea and pulmonary artery stem, and generating a three-dimensional model of a target blood vessel section and peripheral constraint organs and tissues. According to the method, the applicability of the implantable aorta is improved, the service life of the implantable aorta is prolonged, the geometric model of the target blood vessel section can be adjusted by adjusting multiple sets of specific parameters, blood flow design is personalized, the degree of freedom is high, and the reduction degree is high.

Description

technical field [0001] The invention belongs to the field of biological 3D printing modeling, and relates to a parametric modeling method of ascending aorta, aortic arch and three branches thereof based on anatomical features. Background technique [0002] The aorta is the main artery of the systemic circulation. As the largest blood vessel in the human body, it undertakes the function of transporting blood to all parts of the body. Aortic diseases can be roughly divided into three types: congenital malformation, acquired physical damage and deterioration, and aortic inflammation leading to damage. In terms of treatment, there are often drug interventions, stent-assisted therapy, and in severe cases, partial aortic replacement is required. There are limited autologous blood vessels available for replacement, and the artificial blood vessels on the market can guarantee biocompatibility to a certain extent, but there are still defects such as poor morphological fit and diffic...

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Problems solved by technology

However, its defects are also obvious. Since it is only for the restoration of the patient's body aorta, there is no way to adjust the size and relative positional relationship of its various parts. Only the restoration has been achieved, but there is no way to optimize the design.

[0004] Another type of rough parametric modeling of the aorta based on some basic data, such as "A Parametric Model for Studying the Aorta Hemodynamics by means of the Computational Fluid Dynamics" by M.Cilla and M.Casales [J]. Journal of The research of Biomechanics,2020:109691., because it is oriented to the fluid analysis of a specific parameter, only three parameters, the diameter of the aortic entrance, the width of the aortic arch and the angle between the aortic arch and the descending aorta, are involved in the modeling. Does not take into account the complexity of the aortic arch itself and the surrounding constraints

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