Construction method of human body full-airway model with random characteristics

Abstract

The invention discloses a construction method of a human body full-airway model with random characteristics, and belongs to the field of bio-fluid mechanics. Comprising the steps that a CT image of the upper body of a human body is received, medical image reconstruction and reverse engineering are combined, an upper respiratory tract-bronchial tube model based on the CT image is generated, and the model comprises a mouth model, a nose model, a throat model, a throat model, a trachea model and a bronchial tube model; on the basis of a Weibel idealized model, a bronchial tree model which has random growth characteristics and is based on a CT image is constructed, and the bronchial tree model is formed by reconstructing the tail end of a geometric bronchial tube through the CT image and extending outwards; based on a Weibel idealized model, using a parameterized script to generate a pulmonary airway tree model; and assembling and combining the models of all the parts to generate a human body full-airway model with random characteristics. The bronchial tree with the random growth characteristic is constructed based on the Weibel model, the bronchial tree consistent with the actual airway growth in the CT image is assembled to the corresponding CT reconstruction geometric tail end, and the actual respiratory tract distribution condition and the anatomical structure can be reflected.

Description

technical field [0001] The invention belongs to the field of biological fluid mechanics, and more specifically relates to a method for constructing a human body whole airway model with random characteristics. Background technique [0002] The human airway is a channel for gas exchange between the human pulmonary capillaries and the atmosphere, and is composed of an external thoracic airway and an internal thoracic airway. The external thoracic airway consists of the mouth, nose, pharynx, and larynx, and the internal thoracic airway includes the trachea, bronchi, and pulmonary airways. Gas transport begins through the mouth and nasal cavities, through the ever-dividing pulmonary airways to the surface of the alveoli. The establishment of a mathematical model that can describe the morphological characteristics of the whole respiratory tract will bring great convenience to the simulation and analysis of the gas flow characteristics inside the whole respiratory tract, and help ...

AI Technical Summary

Problems solved by technology

Most of the current airway models based on the Weibel model are generated using a fixed angle, which is difficult to reflect the real anatomical structure and three-dimensional structure of the bronchial tree

At the same time, some ideal models based on the Weibel idealized model directly connect the upper and lower airways at the bifurcation of the airway, and the hard connection without transition will cause a sudden change in the wall shear stress, resulting in a partial flow field that does not match the actual flow, making it difficult to Get more accurate simulation results

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