digital subtraction angiography
Also written as: DSA — digital subtraction angiography
Advanced fluoroscopic imaging technique that digitally removes background structures to enhance visualization of contrast-filled blood vessels.
Full Definition
Digital subtraction angiography (DSA) is a sophisticated fluoroscopic imaging technique that uses computer processing to subtract pre-contrast images from post-contrast images, effectively removing background bone and soft tissue structures. This digital enhancement dramatically improves visualization of vascular anatomy and pathology by displaying only the contrast-filled vessels. DSA remains the gold standard for vascular imaging in many applications, providing excellent spatial and temporal resolution for planning interventional procedures and assessing treatment outcomes.
Usage
Usage note: DSA commonly used in established vascular contexts; spell out on first reference.
In Context
- "Digital subtraction angiography demonstrated complete occlusion of the popliteal artery." — Interventional radiology report
- "Post-intervention digital subtraction angiography confirmed restoration of normal flow." — Procedure completion note