Cerebrovascular Anatomy

Question 1

Normal CCA

Answer 1

2D and color doppler evaluation is necessary to determine atherosclerosis formation and areas of flow disturbance.

Question 2

The CCA waveform demonstrates a combination of the

Answer 2

ECA and ICA flow characteristics. High resistance peaked waveform similar to ECA but mild amount of diastolic flow present which is an IVA flow characteristic.

Question 3

Normal ECA

Answer 3

The ECA is usually the smaller, more anterior of the two CCA branches. Color Doppler evaluation can help identify visible extracranial branches that are an ECA characteristic.

Question 4

ECA flow is usually

Answer 4

high resistance due to the vascular beds it supplies. There is also less diastolic flow than in the CCA and ICA.

Question 5

Normal ICA Proximal

Answer 5

The ICA is usually the larger, more posterior of the two CCA branches. Color Doppler evaluation can help identify visible extracranial branches that are an ECA characteristic.

Question 6

ICA flow is usually

Answer 6

low resistance due to the vascular bed (brain) it supplies. there is also more diastolic flow than in the CCA and ECA.

Question 7

Normal Vertebral Artery and Vein

Answer 7

The vertebral arteries should always demonstrate antegrade flow. Always be mindful of your color map settings when evaluating flow direction.