Image registration for digital subtraction angiography
Image registration for digital subtraction angiography
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DOI：
10.1023/a:1008074100927
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发表时间：
1999-04-01
影响因子：
19.5
通讯作者：
Viergever, MA
中科院分区：
文献类型：
--
作者：
Meijering, EHW;Zuiderveld, KJ;Viergever, MA
在临床实践中，数字减影血管造影术（DSA）是一种用于人体血管可视化的强大技术。图像的诊断相关性通常由于伪影而降低，伪影是由于患者运动导致序列中连续图像的未对准而产生的。为了提高减影图像的质量，已经提出了几种配准技术。然而，由于所需的计算时间，它从来没有导致足够快的算法，以便在临床应用中的集成是可接受的。本文提出了一种新的血管造影图像配准方法。它涉及基于边缘的控制点的选择，对于该控制点，通过模板匹配来计算位移，并且通过插值来从该控制点构造完整的位移向量场。根据所计算的位移矢量场的图像的最终变形由图形硬件实时执行。在多个临床数据集上的实验结果表明，该算法是有效的，非常快。
In clinical practice, Digital Subtraction Angiography (DSA) is a powerful technique for the visualization of blood vessels in the human body. The diagnostic relevance of the images is often reduced by artifacts which arise from the misalignment of successive images in the sequence, due to patient motion. In order to improve the quality of the subtraction images, several registration techniques have been proposed. However, because of the required computation times, it has never led to algorithms that are fast enough so as to be acceptable for integration in clinical applications. In this paper, a new approach to the registration of digital angiographic images is proposed. It involves an edge-based selection of control points for which the displacement is computed by means of template matching, and from which the complete displacement vector field is constructed by means of interpolation. The final warping of the images according to the calculated displacement vector field is performed real-time by graphics hardware. Experimental results with several clinical data sets show that the proposed algorithm is both effective and very fast.