The most utilized of the Doppler criteria for estimation of percentage diameter stenosis is

A normal ultrasound characteristic of the internal carotid artery (ICA) shows which one of the following?

The first major branch of the internal carotid artery with clinical significance is the

The left common iliac vein is usually compressed by which one of the following anatomic vessels?

Perforating veins connect the superficial and deep venous systems. Blood flow in the perforating veins is normally from the ______________ to the _____________.

Adequate pressure applied to compress a vein is achieved when ______

Which of the following is a sign or symptom of pulmonary embolism?

You are scanning a large mass that is composed primarily of fat, Which of the following are you most likely to encounter?

Color flow imaging can change in a vessel due to: ____________________

Angle correction of the Doppler signal is not necessary during a lower extremity venous duplex examination because ________________