DSA
Also written as: DSA — Digital Subtraction Angiography
Digital subtraction angiography technique that removes background structures to enhance vessel visualization.
Full Definition
Digital subtraction angiography (DSA) is an advanced fluoroscopic technique used in vascular imaging where a pre-contrast image (mask) is digitally subtracted from contrast-enhanced images to remove overlying bone and soft tissue structures. This process significantly improves visualization of blood vessels by eliminating background interference. DSA is considered the gold standard for many vascular diagnoses and interventional procedures due to its superior spatial and temporal resolution. The technique allows for real-time imaging during procedures and provides the highest quality images for detecting subtle vascular abnormalities.
Usage
Usage note: Always capitalize as DSA when used as abbreviation; spell out on first use in formal reports.
In Context
- "DSA confirmed complete occlusion of the superficial femoral artery." — Interventional radiology report
- "The procedure was performed under DSA guidance with real-time visualization." — Operative note