The best resolution of an image occurs at the ________________ which would be set at or just posterior to the structure being imaged. 

What is vein wall coaptation indicative of?

What structure is located within the white double arrow?

Valves are more numerous in the _______ venous system than in the _______ venous system.

Bilateral brachial arm pressures should not differ by  ___________.

For a stenosis to be hemodynamically significant, it must cause which of the following?

Which pressure should be used to calculate the bilateral ABI’s?

What is a normal resting cardiac output value for the left ventricle?

What is the estimated oxygen saturation level in the pulmonary arteries?

At about the 4th lumbar vertebra, near the level of the umbilicus, the abdominal aorta divides into which right and left vessels?