Using SVD and analyzing wavelets for the analysis and the segmentation of digital subtraction angiography images

The authors introduce the singular value decomposition transform and present an application to intraframe, interframe and intersequence analysis for two image sequences resulting from a binocular angiographic system. It is shown that the second singular value follows the heart´s cyclic behavior, which allows two angiographic sequences to be postsynchronized without electrocardiogram signal recording. Pyramid wavelet transforms and their application to digital subtraction angiography images are addressed. A novel analyzing wavelet acting like a matched filter is discussed