Normally what happens to venous flow in the legs during inspiration
What is decreases?
100
The Doppler effect is presented as a_________ when the source and the receiver are_______.
What is frequency shift, and in motion to each other?
100
Which technique is used to perform spectral analysis on color Doppler data.
What is auto correlation?
100
Which of the following determines the spatial resolution of a display.
- number of pixels
- number of lines on the display
- number of bits per pixel
- spatial pulse length
What is number of lines on the display?
100
Which of the following provides the basis for informed consent.
- notice
- a contract
- autonomy
- beneficence
What is autonomy?
200
What is the hydrostatic pressure at all locations within the arterial circulation.
What is 0 mmHg?
200
Doppler shift produces information about.
What is velocity?
200
What technique is used to perform spectral analysis on pulsed Doppler data.
What is fast fourier transform?
200
Which artifact produces an image with an incorrect number of reflectors.
- propagation speed error
- multipath
- enhancement
- side lobes
What is side lobes?
200
Which one of these terms is not associated with informed consent.
- describing reasonable alternatives
- the patient's acceptance
- evaluation of the patient's understanding
- justice
What is justice?
300
What is the arterial pressure at the knee of the supine patient.
What is 140 mmHg?
300
What is the difference between speed and velocity.
What is speed has only magnitude, velocity has magnitude and direction?
300
Which of the following terms is synonymous with spectral broadening.
What is turbulent flow?
300
Which artifact is unrelated to the dimensions of an ultrasound pulse.
- lateral resolution
- depth resolution
- slice thickness
- refraction
What is refraction?
300
True or false. Informed consent must always be obtained from the patient.
What is false?
400
What is the arterial pressure in the carotid artery of the neck of the supine patient.
What is 140 mmHg?
400
The phenomenon where high velocities appear in the opposite direction is called.
What is aliasing?
400
Which of the following is an advantage of a large packet size.
- less aliasing
- increased frame rate
- improved lateral resolution
- increased Doppler accuracy
What is increased Doppler accuracy?
400
What standard is best used in a quality assurance program.
- subjective
- expert
- objective
- legislative
What is objective?
400
The study of the characteristics, attributes, and quantities of a substance that includes bioeffects .
What is dosimetry?
500
All of the following occur during expiration except.
What is abdominal pressure increases?
500
The frequency at which aliasing occurs is.
What is nyquist limit?
500
Why are dedicated continuous wave Doppler transducers so sensitive.
- absence of the matching layer
- increased electrical conductance
- absence of backing material
- inclusion of demodulator
What is absence of backing material?
500
At what interval should quality assurance evaluations be performed.
- weekly
- daily
- routinely
- periodically
What is routinely?
500
True or false. There are no bioeffects associated with ultrasound.