DSA
Also written as: DSA — Digital Subtraction Angiography
Digital subtraction angiography, an imaging technique that digitally removes background structures to visualize blood vessels.
Full Definition
Digital subtraction angiography (DSA) is an advanced fluoroscopic imaging technique that uses computer processing to subtract or remove background anatomical structures from contrast-enhanced images, leaving only the blood vessels visible. The procedure involves taking images before and after contrast injection, then digitally subtracting the pre-contrast image from the post-contrast image. This technique provides high-resolution visualization of vascular anatomy and pathology with reduced background interference. DSA is considered the gold standard for many vascular diagnostic procedures and interventional planning, particularly in neurovascular and peripheral vascular applications.
Usage
Usage note: Always capitalize as DSA when abbreviated.
In Context
- "DSA confirmed the presence of a cerebral aneurysm requiring endovascular treatment." — Neuroradiology report
- "The patient underwent DSA to evaluate suspected renal artery stenosis." — Interventional procedure note