Spi Questions And Verified Answers Latest Update 2025
Terms in this set (74)
What effect does Frequency Frequency compounding improves signal to noise ratio, spatial
compounding have on an image? resolution, and image quality. It also reduces speckle and
clutter artifacts.
Increasing the frequency improves Axial resolution, lateral resolution, and beam width improve
_______________________ , with increasing frequency.
______, and _.
Increasing line density will improve detail resolution the most
Increasing will improve detail
resolution on the lateral sides of the image. By using more scan lines, the
the most on the lateral sides of the image is created from more reflected
image. information that allows for improved detail.
M-mode eval offers better temporal resolution than 2D
Which of the following correctly
imaging. It is used to assess fast moving structures and eval
describes m-mode?
timing of events in cardiac cycle. Also uses very high sampling
rate
What portion of the TGC curve The slope of the curve should be straight and with a gradual
is the deepest region attenuation increase in amplification until the knee. The knee of a TGC curve
compensation can occur? is the deepest region attenuation
compensation can occur. The far zone is the area of maximum amplification.
You are using a 5MHz Xducer to Remain constant. The media in which the wave is traveling
perform a pulsed wave Doppler through determines the propagation speed of the sound wave.
on the carotid Changes in frequency have no effect on the speed. The same
arteries. You change to a 7.5MHz vessels (media) evaluated with the transducers of different
continuous wave Doppler Xducer frequency, therefore the speed of the wave will remain constant.
to evaluate blood flow. How will The method of ultrasound wave transmission also has no effect
this affect on the propagation speed.
the propagation speed in the
soft tissue of the neck?
A decrease in the imaging depth.. If the PRP decreases, the PRF
Decreasing the pulse repetition will increase which means shorter pulses are emitted more
period leads to: quickly. The shorter pulses will travel a
shorter distance than the pulses emitted from a lower PRF. The
imaging depth will decrease with a decrease in PRP.
, 6dB will decrease the original power by 25%.
If the output power setting is at
A reduction in power of 3dB indicated a decrease of 50% original
100% and this indicates 0dB,
power. Every 3dB that the power decreases will decrease the
decreasing the power by:
power by another 50%. 110%x0.5=50% then 50%x0.5=25%
When you change the PRF, this this adjusts the # of pulses emitted per second.
adjusts:
Binary numbers are used to determine echo placement on the
In a 4 bit memory, the binary image. In a 4 bit system, They are calculated exponentially as
number 1110 indicates which of follows: 8 4 2 1
the following numbers related 1110
to location of the display of Every time a one is located "under" the binary number, It Is
the echo on the screen? added to the total. If a zero is present "under" the binary
number, it is not added to the total. The different numbers
calculated are used to place the echo on the display 8+4+2+0=14
Which of the following best 4D imaging displays 3D images in real time.
describes the difference between
3D ultrasound imaging and 4D
imaging?
If an ellipse is used to document circumference
the =cm
circumference of a structure,
area=cm^2
what unit will be used to report volume=cm^3
the measurement?
What is the best way to increase Decreasing Xducer frequency will increase beam penetration.
beam penetration?
Demodulation is only necessary To prepare the signal for a CRT or TV monitor.
when:
If the sonographer increases the decrease.
size of the field of view, the frame
rate will _______
The gray scale map is adjusted to a Applying pre-processing.
new
map just prior to freezing the
image. This is an example of?
Terms in this set (74)
What effect does Frequency Frequency compounding improves signal to noise ratio, spatial
compounding have on an image? resolution, and image quality. It also reduces speckle and
clutter artifacts.
Increasing the frequency improves Axial resolution, lateral resolution, and beam width improve
_______________________ , with increasing frequency.
______, and _.
Increasing line density will improve detail resolution the most
Increasing will improve detail
resolution on the lateral sides of the image. By using more scan lines, the
the most on the lateral sides of the image is created from more reflected
image. information that allows for improved detail.
M-mode eval offers better temporal resolution than 2D
Which of the following correctly
imaging. It is used to assess fast moving structures and eval
describes m-mode?
timing of events in cardiac cycle. Also uses very high sampling
rate
What portion of the TGC curve The slope of the curve should be straight and with a gradual
is the deepest region attenuation increase in amplification until the knee. The knee of a TGC curve
compensation can occur? is the deepest region attenuation
compensation can occur. The far zone is the area of maximum amplification.
You are using a 5MHz Xducer to Remain constant. The media in which the wave is traveling
perform a pulsed wave Doppler through determines the propagation speed of the sound wave.
on the carotid Changes in frequency have no effect on the speed. The same
arteries. You change to a 7.5MHz vessels (media) evaluated with the transducers of different
continuous wave Doppler Xducer frequency, therefore the speed of the wave will remain constant.
to evaluate blood flow. How will The method of ultrasound wave transmission also has no effect
this affect on the propagation speed.
the propagation speed in the
soft tissue of the neck?
A decrease in the imaging depth.. If the PRP decreases, the PRF
Decreasing the pulse repetition will increase which means shorter pulses are emitted more
period leads to: quickly. The shorter pulses will travel a
shorter distance than the pulses emitted from a lower PRF. The
imaging depth will decrease with a decrease in PRP.
, 6dB will decrease the original power by 25%.
If the output power setting is at
A reduction in power of 3dB indicated a decrease of 50% original
100% and this indicates 0dB,
power. Every 3dB that the power decreases will decrease the
decreasing the power by:
power by another 50%. 110%x0.5=50% then 50%x0.5=25%
When you change the PRF, this this adjusts the # of pulses emitted per second.
adjusts:
Binary numbers are used to determine echo placement on the
In a 4 bit memory, the binary image. In a 4 bit system, They are calculated exponentially as
number 1110 indicates which of follows: 8 4 2 1
the following numbers related 1110
to location of the display of Every time a one is located "under" the binary number, It Is
the echo on the screen? added to the total. If a zero is present "under" the binary
number, it is not added to the total. The different numbers
calculated are used to place the echo on the display 8+4+2+0=14
Which of the following best 4D imaging displays 3D images in real time.
describes the difference between
3D ultrasound imaging and 4D
imaging?
If an ellipse is used to document circumference
the =cm
circumference of a structure,
area=cm^2
what unit will be used to report volume=cm^3
the measurement?
What is the best way to increase Decreasing Xducer frequency will increase beam penetration.
beam penetration?
Demodulation is only necessary To prepare the signal for a CRT or TV monitor.
when:
If the sonographer increases the decrease.
size of the field of view, the frame
rate will _______
The gray scale map is adjusted to a Applying pre-processing.
new
map just prior to freezing the
image. This is an example of?
