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 ________________

A normal venous signal is described as __________ flow

If a patient has normal arterial waveforms shape  but with low velocities in the vessels, which is most likely?

Gray-scale systems typically use ___________ as a means of signal dynamic range reduction.