Diagnostic value of digital subtraction angiography in small intestinal bleeding

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.

Optimized radiographic spectra for small animal digital subtraction angiography.

The increasing use of small animals in basic research has spurred interest in new imaging methodologies. Digital subtraction angiography (DSA) offers a particularly appealing approach to functional imaging in the small animal. This study examines the optimal x-ray, molybdenum (Mo) or tungsten (W) target sources, and technique to produce the highest quality small animal functional subtraction an...

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...