中文摘要：

目的实时三维超声是心脏血流动力学研究的重要手段。以前靠人工寻找最佳观察切面,难度较大;现提出新方法使计算机自动选取。方法将三维超声心动仪得到的体数据进行绘制显示后进行各种切面的提取绘制操作。由于个人电脑上带图形处理器的显卡发展,该研究在普通的个人电脑上实现了复杂的三维动态心脏图像显示。并利用改进的互信息法对最优切面提取进行了论证。结果采用了C/C＋＋语言编程,使用OpenGL三维图形库进行了绘制,并采用了Cg语言编写GPU（Graphics Processing Unit）进行了硬件加速,快速的实现了三维超声心动图最优切面自动选取的功能。结论此方法能以较高的准确率及较快的绘制速度满足医生在临床中的要求。

英文摘要：

Objective Real-time three-dimensional echocardiography （RT3DE） is an important method for heart hemodynamics research. Traditionally the whole research process has to divide to the following two phases： firstly render the heart full-volume data from RT3DE and then find the optimal cutting planes of it with manual operation. Such procedure not only spent too much time but also difficultly to handle. Now, the new method could be used to implement the extraction on personal computer automatically. Methods With the help of the video card with graphic processing unit, we reconstruct the 3D image of the heart based on personal computer and demonstrate the improved entropy for the optimal cross section selection with correlation coefficient method. Results We have completed the whole process in C/C＋＋, with the help of OpenGL Library. We also add some segment into the program to speed up the hardware with Cg language on GPU （Graphics Processing Unit）. Conclusion This new method could satisfy the doctor＇s clinical need with the better veracity and higher cartography speed.