摘要
目的:研究一种颈总动脉超声图像内中膜边界识别跟踪方法,为采用更为简便的方法提取内中膜边界提供基础。方法:规定一个代价函数,从前导程序给定的初始定位点出发,向两侧逐列延伸,在每一像素列上计算代价函数的值,寻找代价函数最小值的点的集合,直至满足程序规定的终止条件后,代价函数的计算过程终止。程序记录下代价函数最小值的所有点的坐标和灰度值。结果:在临床采集的图像中可以跟踪得到内中膜边界点集合并在输出图形中显示,程序后台存储了点集合的坐标及相应灰度数据。结论:该方法可以在较为清晰的超声图像中实现颈总动脉内中膜边界跟踪。
Objective： Give a method for tracing boundary of inner-medium membrane in the ultrasonic image of common carotid artery. Methods： Giving a cost function before the programme begins to search the pixel point set whose cost function have the minimum value. The searching process starts from an initial anchor point given by the precedent programme. The calculation of cost function on each pixel point column on both sides of the initial anchor point will not stop until the terminal conditions are fulfilled. The programme will record the coordinates and pixel values of all the points with the minimum cost function value obtained from the calculation. Results： It can trace the boundary of inner-medium membrane in the CCA image from a clinical exam and can export the processed image with highlighted area. There is a daemon that records the coordinates and pixel values of the point set. Conclusion： This method can trace the boundary of inner-medium membrane in the CCA ultrasonic image when the CCA image is distinct.
出处
《中国医学装备》
2015年第11期24-27,共4页
China Medical Equipment
基金
上海市科委重点科技攻关项目(10441901800)"基于彩色多普勒超声影像的脑血液循环系统状态的计算机辅助诊断治疗监视系统的研制"
关键词
内中膜
边界跟踪
代价函数
超声图像
Inner-medium membrane
Boundary tracing
Cost function
Ultrasonic image
