Diagnostic ultrasound | Assessment Questions With Answers and
detailed Rationales
Question 1.
Define ultrasound imaging
Correct Answer: A cross-sectional imaging method based on sound waves
reflected off tissue interfaces
Question 2.
Can PTs pursue certification as MSK sono- graphers?
Correct Answer: Yes
Question 3.
Are CT, MRI and X-rays usually read as static or dynamic images?
Correct Answer: Usually read as static images
Question 4.
How is diagnostic ultrasound imaging unique?
Correct Answer: It's a dynamic imaging modality, meaning you can see changes
in real time
Question 5.
What is the common frequency for the sound waves used in ultrasound imaging?
Correct Answer: Sound waves with a frequency over 20,000 Hx
Question 6.
What are the categories of ultrasound? (2)
Correct Answer: Therapeutic (tx via heating) Diagnostic (imaging via reflections)
Question 7.
What are some of the pieces of equipment needed to perform diagnostic ultrasound? (4)
Correct Answer: Pulser Ultrasound transducer Scan converter Monitor
Question 8.
What does a pulser perform for diagnostic imaging? At what frequency?
Correct Answer: Produces waves of electrical energy in the frequency from 2-15
MHz (base frequency)
, Question 9.
What occurs between the bundles of waves given by a pulser? How often are the waves
emitted?
Correct Answer: Silence between bundles Sound waves emitted only 1% of exam
time
Question 10.
What does an ultrasound transducer perform? What does it do to tissues?
Correct Answer: Converts electricity from pulser to sound energy Delivers the
US to the tissues
Question 11.
How does an ultrasound transducer work?
Correct Answer: Receives reflected waves, converts reflected waves back to
electrical signals
Question 12.
How are the crystals within an ultrasound transducer arranged?
Correct Answer: Contains an array of crystals that are linear or curvilinear
Question 13.
What is the function of the scan converter and monitor? (3)
Correct Answer: It's a computer that changes incoming signal from analog to
digital matrix, allowing it to be displayed as an image Amplifies signal,
decreases noise Monitors display images
Question 14.
What does the reverse piezoelectric part of the transducer do? Piezoelectric?
Correct Answer: Reverse piezoelectric: Sound production, electricity to sound
Piezoelectric: Receives data, sound to electricity
Question 15.
What are the factors that determine the penetration of ultrasound? (3)
Correct Answer: Frequency Wavelength Quality of tissue interfaces
Question 16.
What are the potential interactions between ultrasound and tissues? (4 things)
Correct Answer: Absorption Reflection Refraction Scatter
detailed Rationales
Question 1.
Define ultrasound imaging
Correct Answer: A cross-sectional imaging method based on sound waves
reflected off tissue interfaces
Question 2.
Can PTs pursue certification as MSK sono- graphers?
Correct Answer: Yes
Question 3.
Are CT, MRI and X-rays usually read as static or dynamic images?
Correct Answer: Usually read as static images
Question 4.
How is diagnostic ultrasound imaging unique?
Correct Answer: It's a dynamic imaging modality, meaning you can see changes
in real time
Question 5.
What is the common frequency for the sound waves used in ultrasound imaging?
Correct Answer: Sound waves with a frequency over 20,000 Hx
Question 6.
What are the categories of ultrasound? (2)
Correct Answer: Therapeutic (tx via heating) Diagnostic (imaging via reflections)
Question 7.
What are some of the pieces of equipment needed to perform diagnostic ultrasound? (4)
Correct Answer: Pulser Ultrasound transducer Scan converter Monitor
Question 8.
What does a pulser perform for diagnostic imaging? At what frequency?
Correct Answer: Produces waves of electrical energy in the frequency from 2-15
MHz (base frequency)
, Question 9.
What occurs between the bundles of waves given by a pulser? How often are the waves
emitted?
Correct Answer: Silence between bundles Sound waves emitted only 1% of exam
time
Question 10.
What does an ultrasound transducer perform? What does it do to tissues?
Correct Answer: Converts electricity from pulser to sound energy Delivers the
US to the tissues
Question 11.
How does an ultrasound transducer work?
Correct Answer: Receives reflected waves, converts reflected waves back to
electrical signals
Question 12.
How are the crystals within an ultrasound transducer arranged?
Correct Answer: Contains an array of crystals that are linear or curvilinear
Question 13.
What is the function of the scan converter and monitor? (3)
Correct Answer: It's a computer that changes incoming signal from analog to
digital matrix, allowing it to be displayed as an image Amplifies signal,
decreases noise Monitors display images
Question 14.
What does the reverse piezoelectric part of the transducer do? Piezoelectric?
Correct Answer: Reverse piezoelectric: Sound production, electricity to sound
Piezoelectric: Receives data, sound to electricity
Question 15.
What are the factors that determine the penetration of ultrasound? (3)
Correct Answer: Frequency Wavelength Quality of tissue interfaces
Question 16.
What are the potential interactions between ultrasound and tissues? (4 things)
Correct Answer: Absorption Reflection Refraction Scatter
