【摘要】 根据对颈动脉斑块几何形状、组织特征及声学特性的分析,提出基于FIELD II颈动脉斑块血管的超声仿真方法,并利用MATLAB中的图形用户界面设计开发超声仿真系统。以基于元球的隐式曲面造型技术对斑块血管进行三维几何建模,以空间位置伽马随机分布的散射点对其进行组织建模,超声仿真并建立仿真系统。对系统仿真的超声图像进行统计分析,与模型预设值及临床B超图像进行比较,结果充分验证了本文仿真方法及仿真系统的有效性。更多还原

【Abstract】 A method of ultrasonic simulation based on the FIELD II software platform for carotid artery plaque was proposed according to the analysis for geometrical shape,tissue characteristics and acoustic properties of carotid artery plaques in clinic,and then a simulation system was developed by using the MATLAB graphical user interface(GUI).In the simulation and development,a three-dimensional geometric model of blood vessel with plaques was set up by using the metaball implicit surface technique,and a tissue model was established based on the scatterers with spatial position of gamma random distribution.Comparison of the statistical and geometrical characteristics from simulated ultrasound B-mode images with those based on clinical ones and preset values,the results fully demonstrated the effectiveness of the simulation methods and system.更多还原