DSA
Also written as: DSA — Digital Subtraction Angiography
Imaging technique that subtracts pre-contrast images from contrast-enhanced images to highlight vascular structures.
Full Definition
Digital Subtraction Angiography is a sophisticated imaging technique that enhances vascular visualization by digitally subtracting pre-contrast mask images from contrast-enhanced images. This process eliminates background structures, leaving only the contrast-filled vessels clearly visible. In cardiovascular radiology, DSA provides superior image quality for coronary angiography, peripheral vascular studies, and interventional procedures. The technique requires precise patient positioning and breath-holding to prevent motion artifacts that could compromise image quality. DSA has become the gold standard for diagnostic and therapeutic vascular imaging.
Usage
Usage note: Distinguish from other angiographic techniques in procedural documentation.
In Context
- "DSA imaging revealed excellent opacification of the coronary tree without motion artifacts." — Angiography report
- "The DSA sequence demonstrated improved vessel contrast compared to conventional angiography." — Technical imaging note