Three-Dimensional Digital Subtraction Angiography
Three-Dimensional Digital Subtraction Angiography
复制标题
三维数字减影血管造影
DOI：
--
复制
发表时间：
1982
影响因子：
10.6
通讯作者：
M. Han
中科院分区：
文献类型：
--
作者：
H. Kim;B. Min;T. Lee;Sung J. Lee;C. W. Lee;Jae H. Park;M. Han
采用染色边缘跟踪算法确定数字减影双翼血管造影前后和侧位两幅图像的对应点。在狗的实验和临床观察中，这种对应关系被用于重建大脑动脉的三维图像。通过对比斜视图实测图像和计算重建图像，对该方法进行了验证。在目前的研究中，我们开发了三种新的算法。第一种算法是利用在两个投影视图中运动边缘处的对比介质密度显示相同的变化模式来确定相应的染料边缘点。这种染料边缘密度的移动模式是使用对两个连续帧的染料密度进行互相关匹配的方法来计算的。第二种算法是简化透视变换，第三种算法是利用互补法定位小容器上的近似点来识别对应点。该方法可用于利用染料边缘位移和三维距离数据计算血流速度。
A dye-edge tracking algorithm was used to determine the corresponding points in the two images (anterior-posterior and lateral) of the digital subtraction biplane angiography. This correspondence was used to reconstruct three-dimensional images of cerebral arteries in a dog experiment and a clinical observation. The method was tested by comparing the measured image of oblique view to the computed reconstructed image. For the present study, we have developed three new algorithms. The first algorithm is to determine the corresponding dye-edge points using the fact that the density of contrast media at the moving edge shows the same changing pattern in the two projection views. This moving pattern of dye-edge density is computed using a matching method of cross correlation for the two sequential frames' dye density. The second algorithm is for simplified perspective transformation, and the third is to identify the corresponding points using a complementary method for locating the approximate points on the small vessels. The present method can be applied to compute the velocity of blood flow using the dye-edge displacement and the three-dimensional distance data.