DAVIES SPI FINAL PAPER EXAM QUESTIONS ACCURATE ANSWERS FULL SOLUTION
Question:
The thermal index indicates:
Answer:
Estimated temperature increase in tissue
Question:
You are performing a sonographic exam and notice that the TI reading is 1. What does this indicate?
Answer:
The output level is high enough that the temperature could increase as much as 1 degree Celsius if
the transducer were held stationary
Question:
A shadow depicted by a renal stone is primarily a result of the following sound-tissue interaction:
Answer:
Reflection
Question:
If sound waves of 3MHz, 5MHz, and 10MHz are transmitted through the same section of anatomy,
reflections from which frequency would reach the transducer first?
Answer:
Reflections from all 3 frequencies would have nearly identical transmit times
,Question:
What type of sound travels through a vacuum?
Answer:
Sound cannot travel through a vacuum
Question:
The maximum cyclical change in a quantity is known as:
Answer:
Amplitude
Question:
Two benefits of tissue harmonic imaging:
Answer:
Grating lobe artifacts are reduced and lateral resolution is improved
Question:
Wavelength depends on what two factors:
Answer:
Propagation speed and frequency
Question:
What sound parameter is determined only by the medium?
Answer:
Propagation speed
Question:
,Snell's Law describes:
Answer:
The angle of sound transmission at an interface between media having different propagation speeds
Question:
What sonographic application has the lowest FDA approved SPTA values?
Answer:
Ophthalmic
Question:
Which of the following human tissues has the highest rate of attenuation of an ultrasound wave?
Answer:
Lung
Question:
What can you improve by changing the grayscale map?
Answer:
Contrast resolution
Question:
What describes an analog signal?
Answer:
CONTINUOUS variation of the signal is possible
Question:
What system control converts the numbers stored in memory to proportional voltages that control
the brightness on a CRT monitor?
, Answer:
Digital to Analog converter
Question:
What physical concept allows us to determine the location of an interface by measuring the elapsed
time between the transmitted pulsed ultrasound wave and the detected echo from that interface?
Answer:
Echo RANGING
Question:
When adjusting the PRF you are changing what?
Answer:
The number of pulses per second
Question:
Which artifact is related to the sound beam traveling through a structure with low attenuation?
Answer:
Enhancement Enhancement occurs distal to a structure that has less attenuation of the sound beam
compared to the surrounding tissue. Hence, there is more signal beyond it and the reflections have
greater amplitude, resulting in a brighter image.
Question:
What part of the color map represents the highest POSITIVE doppler shift?
Answer:
The color(s) at the very top of the color map
Question:
Question:
The thermal index indicates:
Answer:
Estimated temperature increase in tissue
Question:
You are performing a sonographic exam and notice that the TI reading is 1. What does this indicate?
Answer:
The output level is high enough that the temperature could increase as much as 1 degree Celsius if
the transducer were held stationary
Question:
A shadow depicted by a renal stone is primarily a result of the following sound-tissue interaction:
Answer:
Reflection
Question:
If sound waves of 3MHz, 5MHz, and 10MHz are transmitted through the same section of anatomy,
reflections from which frequency would reach the transducer first?
Answer:
Reflections from all 3 frequencies would have nearly identical transmit times
,Question:
What type of sound travels through a vacuum?
Answer:
Sound cannot travel through a vacuum
Question:
The maximum cyclical change in a quantity is known as:
Answer:
Amplitude
Question:
Two benefits of tissue harmonic imaging:
Answer:
Grating lobe artifacts are reduced and lateral resolution is improved
Question:
Wavelength depends on what two factors:
Answer:
Propagation speed and frequency
Question:
What sound parameter is determined only by the medium?
Answer:
Propagation speed
Question:
,Snell's Law describes:
Answer:
The angle of sound transmission at an interface between media having different propagation speeds
Question:
What sonographic application has the lowest FDA approved SPTA values?
Answer:
Ophthalmic
Question:
Which of the following human tissues has the highest rate of attenuation of an ultrasound wave?
Answer:
Lung
Question:
What can you improve by changing the grayscale map?
Answer:
Contrast resolution
Question:
What describes an analog signal?
Answer:
CONTINUOUS variation of the signal is possible
Question:
What system control converts the numbers stored in memory to proportional voltages that control
the brightness on a CRT monitor?
, Answer:
Digital to Analog converter
Question:
What physical concept allows us to determine the location of an interface by measuring the elapsed
time between the transmitted pulsed ultrasound wave and the detected echo from that interface?
Answer:
Echo RANGING
Question:
When adjusting the PRF you are changing what?
Answer:
The number of pulses per second
Question:
Which artifact is related to the sound beam traveling through a structure with low attenuation?
Answer:
Enhancement Enhancement occurs distal to a structure that has less attenuation of the sound beam
compared to the surrounding tissue. Hence, there is more signal beyond it and the reflections have
greater amplitude, resulting in a brighter image.
Question:
What part of the color map represents the highest POSITIVE doppler shift?
Answer:
The color(s) at the very top of the color map
Question:
