Digital Subtraction Angiography (DSA) is an advanced imaging technique used to visualize blood vessels in the brain, neck, and other parts of the body with high precision.
It helps neurologists and interventional radiologists diagnose and treat vascular (blood vessel) disorders.
Why is DSA used in Neurology?
DSA is commonly used to detect and evaluate:
- Brain aneurysms
- Arteriovenous malformations (AVMs)
- Stroke (blockages or clots)
- Narrowing of blood vessels (stenosis)
- Vascular tumors
How does DSA work?
- A contrast dye is injected into the blood vessels
- X-ray images are taken
- Background structures (like bones) are digitally removed (“subtracted”)
- This gives a clear view of only the blood vessels
Role in Treatment
DSA is not just diagnostic—it is also used during procedures like:
- Coiling of aneurysms
- Stroke interventions (thrombectomy)
- Stenting of narrowed vessels
