Advantages of Digital Subtraction Angiography During Nerve Block

advantages of digital subtraction angiography during nerve block

conclusions the advantages of dsa in fluoroscopy-guided transforaminal epidural block and nerve block are identification of the degree of appropriate contrast flow (epidural and nerve root sleeve) and the intravascular administration without overlapping radiodense structures. introduction most pain physicians know that fluoroscopy might improve the safety, accuracy, and efficacy of nerve block;...

Advantages of Digital Subtraction Angiography During Nerve Block

INTRODUCTION Most pain physicians know that fluoroscopy might improve the safety, accuracy, and efficacy of nerve block; however, it is difficult to distinguish the previously administered contrast medium from the injecting contrast medium, and to identify accurate contrast medium diffusion flow in a case of existing radiodensities such as cement and screw. Digital subtraction angiography (DSA)...

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.

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...