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MR Angiogram-AP projection

MRA of the circle of Willis vessels can be performed without iv contrast enhancement. The technique capitalized on the properties of flowing blood. Vessels appear white on this type of image, and the background tissues are suppressed.

The images are reformatted to demonstrate the anterior and posterior circulation separately.

Identify the following:

1. left internal carotid artery

2. left middle cerebral artery

3. left anterior cerebral artery

4. right anterior cerebral artery

5. right middle cerebral artery

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