Exam 4 Review

What is the process that converts negative half cycles into positive half cycles?

• rectification

• compression

• amplification

• jamming out to Ace of Base for a while afternoon to lift your mood

Which direction is the blood flowing in this image?

• right to left

• left to right

• cannot be determined

• both

What is an advantage of continuous wave doppler?

• it can display 2D image with a spectral doppler graph

• It has a wide bandwidth

• It has a range resolution

• It can display high velocities without aliasing

What are the factors that will introduce resistance to blood flow?

• Viscosity

• Friction

• Inertia

• All of the Above

Pousielle's equation is used to predict _____ in straight long lines.

• Volume flow rate

• blood velocities

• plaque buildup

• the point at which turbulence occurs

• none of the above e

Using a higher persistence level will make the image appear:

• clearer

• sharper

• smoother

• with better temporal resolution

Multiple focal zones are typically used to image:

• structures that are moving rapidly

• structures that lie deep in the body

• structures that are heterogenous

• structures that have little movement

Which of the following is not a characteristic of turbulent blood flow?

• noisy

• parabolic flow pattern

• RBCs moving in all directions

• Random and Chaotic

• All of the above

What is the equation for Nyquest Limit?

• NL = PRF/2

• F= c /2x PE thickness

• NL = c/f

• NL = PRP/2

What provides potential energy in the cardiovascular system?

• distal arteries

• blood flowing through the vessel

• beating heart

• venous system