Phase-Based Nonrigid Deformation for Digital Subtraction Angiography

MR Digital Subtraction Angiography

Analysis of Subtraction Methods in 3D Contrast-Enhanced MR Digital Subtraction Angiography Yuexi Huang Master of Science 2001 Department of Medical Biophysics University of Toronto 3D Contrast-enhanced MR angiography is promising as a replacement to catheter-based x-ray angiography due to its non-invasive nature. However, the image quality of MR angiography is still inferior to that of x-ray an...

Digital subtraction angiography.

Nonrigid Image Registration in Digital Subtraction Angiography Using Multilevel B-Spline

We address the problem of motion artifact reduction in digital subtraction angiography (DSA) using image registration techniques. Most of registration algorithms proposed for application in DSA, have been designed for peripheral and cerebral angiography images in which we mainly deal with global rigid motions. These algorithms did not yield good results when applied to coronary angiography imag...

Motion compensated digital subtraction angiography

Digital subtraction angiography, whether based on traditional X-ray or MR, su ers from patient motion artifacts. Until now, the usual remedy is to pixel shift by hand, or in some cases performing a global pixel shift semi-automatically. This is time consuming, and cannot handle rotations or local varying deformations over the image. We have developed a fully automatic algorithm that provides fo...

Low-cost digital subtraction angiography.

Intravenous angiography was an important diagnostic tool earlier in th is century [1] , however, the technique had many drawbacks . Film timing was critical, the volume of contrast material was high , and the contrast resolution was often poor. When safer techniques for direct arteriography were developed, intravenous angiography was abandoned . Computed digital image processing has brought a r...