URR Other Imaging (Intracranial)

Question 1

considered gold standard for arterial eval?

Answer 1

angiography

Question 2

uses iodinated contrast to eval lumen characteristics of vessels?

Answer 2

angiography

Question 3

the seldinger technique during angiography used to insert the catheter into where?

Answer 3

CFA, brachial A is alternate access point

Question 4

what happens during angiography?

Answer 4

-catheter is advanced through the Ao to the CA for CA and circle of willis eval and to the subclavian and for ventrobrasila and circle of willis eval
-contrast opacifies the vessel lumen in norm vessels
-areas of absence of contrast indicates narrowing/obstruction
-used to estimate diameter stenosis and can be compared with US info

Question 5

what is the preferred method for fibromuscular dysplasia?

Answer 5

angiography

Question 6

limitations for angiogaphy?

Answer 6

-invasive
-contrast allergen
-single plane eval
-can only estimate diameter stenosis not location
-no flow velocity
-no turbulent flow

Question 7

-images in multiple planes
-quantifies blood flow, evals bones and tissues
-tends to overestimate stenosis
-no doppler flow

Answer 7

Magnetic Resonance Angio (MRA0)

Question 8

-evals cerebral infarcts, aneurysms, AV mals, and hemorrage
-only one plane images
-new tech uses 3D reconstruction of carotids
-no doppler flow

Answer 8

computed tomography angio (CTA)