心外膜标测系统图形显示软件的设计

The Design of Graphic Software in Epicardial Mapping System

心外膜标测是一种精确测量和观察分析心脏电活动的方法,辅以直观的实时显示图能为外科及内科医生提供一条准确迅速的判断指标．介绍了基于VC++的64导心外膜Mapping标测系统的软件设计与实现,包括特征点提取算法、多导同步心电监测、等值线图的绘制等．并着重介绍了其中的等值线图绘制的两种方法:一是对网格数据实施等值线追踪后,连接各等值点,再加注数值标记即可;二是对网格化的数据按照一定的规则,直接对各分块填充不同的颜色,配上颜色尺度条便可表征不同的数据．

Isopleth graphic is a denotation of discrete data, widely used in many fields of engineering and technology such as water conservancy, civil engineering, geological engineering, petroleum reconnaissance etc. Epicardial mapping is a method of observing, detecting and analyzing cardiac electropotential signals with precision. Doctors can clearly acquire information of blood-supply in the ischemia myoeardium through real-time potential map or activation map during the bridging operation of coronary artery. In this paper, we describe the design of Graphic-display software based on VC ＋ ＋ 64 epicardial mapping system, which includes the algorithm for keypoint-distilling, multi-channel ECG signals detecting, drawing of the isoline etc; and the two methods of the isoline＇ s drawing are introduced emphatically： one is based on grid data and contour line tracing is necessary, then join each separate point and mark the data; the other is also based on grid data but contour line tracing is unnecessary, which just needs partiting the filed and filling the small blocks with diverse colors.