Quiz 3 *contents from wk3 & wk4

Question 1

If you are assessing a superficial vessel, you will use a ________ frequency transducer.

Answer 1

high

Question 2

What should be done to this image to improve the color fill within this vessel?

Answer 2

My Ans: try to keep the vessel straight across the screen and open up the closed end if possible

steer the color box and adjust color scale low then increase color gain

Question 3

Increasing the color box size will increase the frame rate.
T or F ?

Answer 3

F

Question 4

For the most accurate velocities in spectral Doppler imaging, we always want the ultrasound beam _______ to the vessel wall.

Answer 4

0 degree

Question 5

The sample gate determines:
1. The Doppler audio and spectral display
2. How much of the flow through a vessel cross section will contribute to the Doppler measurement
3. The size of the spectral waveform
4. The rate per minute

Answer 5

2. How much of the flow through a vessel cross section will contribute to the Doppler measurement

Question 6

What does each letter in “PACS” stand for?

Answer 6

picture archival communication system

Question 7

Which ultrasound probe is used to perform most vascular ultrasound exams?

Answer 7

linear array probe

Question 8

Which control allows a sonographer to control the height of the waveform on a spectral display?

1. Doppler gain
2. Doppler sweep speed
3. Doppler scale
4. Wall filter

Answer 8

3. Doppler scale

Question 9

The best 2D/B-mode image quality is obtained when the ultrasound beam intersects the arterial walls at the following angle:

Answer 9

90 degree

Question 10

Frequency shifts are only produced by the flow/movement of blood within a vessel.

T or F ?

Answer 10

F
* it requires more than the blood ddflow i.e. cosine angle, propagation speed

Question 11

!!! flag question
If you have an image with a Doppler angle of 80 degrees, and the same image with a Doppler angle of 45 degrees, which image (80 degrees or 45 degrees) will have a higher and more inaccurate estimated velocity?

Answer 11

The image with a 80 degree angle

Question 12

Aliasing can be useful in identifying elevated velocities with color Doppler imaging.

T or F ?

Answer 12

T

Question 13

Ocular symptoms suggest disease in the ___________ carotid system.

1. ipsilateral
2. contralateral
3. proximal
4. entire

Answer 13

1. ipsilateral

Question 14

What would you do with the transducer to improve the color flow within this vessel?

Answer 14

My Ans:
steer the color box or adjust the transducer to show the vessel diagnally in the screen (left up)

Question 15

Which direction is this color box steered?

Answer 15

left

Question 16

The lighter/brighter the color within the vessel, the _______ the flow of the blood.

Answer 16

faster

Question 17

What phase of the cardiac cycle does the initial sharp upstroke in an arterial waveform correspond with?

Answer 17

systole

Question 18

Which type of Doppler is used when a sonographer wishes to perform precise assessments of a specific vessel?

Answer 18

pulsed-wave Doppler

Question 19

What type of Doppler does not provide directional information?

Answer 19

Power Doppler

Question 20

When a significant stenosis is present, what would you expect to see when utilizing Color Doppler?

1. A narrowing of color fill with an area of distal turbulence
2. A very dark shade of color distal to the stenosis
3. An area of proximal turbulence
4. No color flow within the vessel

Answer 20

1. A narrowing of color fill with an area of distal turbulence