Digital Subtraction Angiography (DSA) - Invasive Tests
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What is a mask?
An image of the same area before the contrast.
What does DSA do?
It is a type of fluoroscopy used to clearly see blood vessels in a bony or dense soft tissue.
How are images produced?
Using contrast medium by subtracting "pre-contrast image" aka MASK. In order to see blood vessels better, a mask is used.
