Digital subtraction angiography (DSA) is best described as which of the following?

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Multiple Choice

Digital subtraction angiography (DSA) is best described as which of the following?

Explanation:
Digital subtraction angiography relies on removing background structures to reveal blood vessels clearly. By taking images before and after injecting iodinated contrast and subtracting the pre-contrast image from the post-contrast one, bones and other tissues are masked out, leaving a clean view of the arteries. This is an X-ray technique that uses contrast, not ultrasound, and it does not visualize nerves directly or replace contrast with MRI-based methods.

Digital subtraction angiography relies on removing background structures to reveal blood vessels clearly. By taking images before and after injecting iodinated contrast and subtracting the pre-contrast image from the post-contrast one, bones and other tissues are masked out, leaving a clean view of the arteries. This is an X-ray technique that uses contrast, not ultrasound, and it does not visualize nerves directly or replace contrast with MRI-based methods.

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