Class 9 Quiz Review

what direction should the sonographer steer the color box?

• to the left

• to the right

• not to be steered

If you increase the doppler angle during an exam, what would be the expected result?

• doppler shift would decrease

• doppler shift would increase

• flow velocity would change direction

• speed of sound would decreqase

The pocket size or ensemble length in color doppler refers to the number of:

• pulses per second

• color gain

• scan lines per frame

• pulses per scan lines

You have obtained a color doppler image on the CCA. If the received frequency is greater than the transmitted frequency, which of the following will occur?

• the color in the vessel will represent flow away from the transducer

• there will be no color in the vessel due to doppler shift occurring

• the color in the vessel will represent blood flow moving toward the transducer

• the color in the vessel would be red

Which direction is the blood flowing in this vessel?

• right to left (a)

• left to right (b)

• both a and b (c)

• unable to determine (d)

Which action can be used to improve temporal resolution in the image?

• increase color box depth

• decrease color box width

• increase depth of 2D image

• steer box the other way

With color imaging with priority control, which gray scale echo strength will demonstrate color?

• inverts the color in the color map

• gives the technologist the control over where to place the sample volume

• adjusts the packet size

• selects which gray scale echo strength will demonstrate color

T/F: The variance color maps demonstrate a change in hues colors from left to right and top to bottom.

• True

• False

If the cosine of the angle is increased, then the doppler shift frequency is:

• increased

• decreased

• both

• stays the same

What could the sonographer do to increase the color in the vessel above?

• decrease scale function

• lower the wall filter

• increase color gain

• all of the above