DSA
Also written as: DSA — Digital Subtraction Angiography
Digital subtraction angiography; an imaging technique that enhances vessel visualization by subtracting background structures.
Full Definition
Digital subtraction angiography (DSA) is an advanced fluoroscopic imaging technique that enhances visualization of blood vessels by digitally subtracting pre-contrast images from post-contrast images, effectively removing background bone and soft tissue structures. This process results in clear images showing only the contrast-filled vessels. DSA provides superior temporal and spatial resolution compared to other angiographic techniques and remains the gold standard for evaluating complex vascular anatomy, planning interventional procedures, and assessing treatment outcomes. The technique is essential for cerebrovascular imaging, complex aortic pathology, and precise measurement of vascular dimensions.
Usage
Usage note: Considered the gold standard for vascular imaging; spell out on first use.
In Context
- "DSA revealed a small cerebral aneurysm not visible on CTA." — Neuroradiology report
- "The endovascular procedure was performed under DSA guidance." — Interventional radiology procedure note