digital subtraction angiography
Advanced imaging technique that uses computer processing to enhance visualization of blood vessels.
Full Definition
Digital subtraction angiography (DSA) is a specialized radiographic technique that uses computer processing to subtract background tissues from contrast-enhanced vascular images, producing high-resolution visualization of blood vessel anatomy and pathology. This gold-standard imaging modality involves injection of contrast material into vessels while acquiring sequential digital images, with computer subtraction eliminating non-vascular structures. In vascular medicine reports, DSA findings provide definitive anatomical details crucial for diagnosis and treatment planning, requiring precise documentation of vessel caliber, flow patterns, and pathological findings.
Usage
Usage note: Commonly abbreviated as DSA; distinguish from other angiographic techniques in clinical context.
In Context
- "Digital subtraction angiography revealed 90% stenosis of the left internal carotid artery." — Diagnostic imaging report
- "DSA guidance enabled precise placement of the covered stent across the thoracic aortic lesion." — Interventional procedure documentation