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Digital Subtraction Angiography (DSA)
Digital Subtraction Angiography (DSA)
Provides an image of the blood vessels in the brain to detect a problem with blood flow. The procedure involves inserting a catheter (a small, thin tube) into an artery in the leg and passing it up to the blood vessels in the brain. A contrast dye is injected through the catheter and X-ray images are taken of the blood vessels.