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ARDMS SPI Review High-Quality Questions & Expert Answers to Boost Your Exam Success
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ARDMS SPI Review High-Quality Questions & Expert Answers to Boost Your Exam Success
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ARDMS SPI Review High-Quality Questions &Expert Answers to Boost Your Exam Success
Materials used for the matching layer of a transducer must have an impedance
between the impedance levels of the:
• A) Skin and air
• B) Skin and muscle
• C) Skin and PE element
• D) PE element and bone
Correct Answer: C) Skin and PE element
Rationale: The matching layer is designed to minimize impedance differences between the
transducer's piezoelectric (PE) element and the skin, allowing for efficient transmission of
sound waves into the body.
2. Which of the following abnormalities would lead to an increase in the Reynolds
number?
• A) Aneurysm
• B) Vasoconstriction
• C) Stenosis of the vessel
• D) Thrombosis
Correct Answer: C) Stenosis of the vessel
Rationale: Reynolds number increases with turbulent flow, which is often caused by vessel
narrowing (stenosis), leading to chaotic blood flow.
3. If a 3.5 MHz wave is transmitted through the media listed below, the longest
wavelength will be seen in the wave moving through:
• A) Air
• B) Water
• C) Bone
, • D) Muscle
Correct Answer: C) Bone
Rationale: The speed of sound is highest in bone, resulting in a longer wavelength. Longer
wavelengths are directly related to faster propagation speeds.
4. If you are using a transducer with a 100 microsecond pulse repetition period, a
Doppler shift greater than ____________ will lead to aliasing on the display.
• A) 1 kHz
• B) 3 kHz
• C) 5 kHz
• D) 7 kHz
Correct Answer: C) 5 kHz
Rationale: Aliasing occurs when the Doppler shift exceeds the Nyquist limit, which in this
case is half of the pulse repetition frequency (PRF), or 5 kHz.
5. Which of the following persistence levels should be used to optimize color Doppler
imaging of cardiac structures?
• A) High
• B) Medium
• C) Low
• D) None
Correct Answer: C) Low
Rationale: Low persistence allows for better temporal resolution, which is critical in
cardiac imaging where rapid motion occurs.
6. Which of the following artifacts cannot be corrected by increasing the wall filter
setting?
• A) Clutter artifact
• B) Flash artifact
, • C) Aliasing artifact
• D) Noise artifact
Correct Answer: C) Aliasing artifact
Rationale: Aliasing is caused by exceeding the Nyquist limit and cannot be corrected by
adjusting the wall filter; instead, lowering the Doppler frequency or increasing the PRF is
required.
7. What changes occur to the ultrasound beam when timed pulses are emitted from
the edge elements to the center elements of the phased transducer?
• A) Beam steering
• B) Beam broadening
• C) Electronic focusing
• D) None
Correct Answer: C) Electronic focusing
Rationale: Emitting pulses from the edges to the center elements creates an electronic
focusing effect, which helps to focus the beam on a specific point.
8. Which of the following correctly describes Power Doppler?
• A) Color display is dependent on angle
• B) Color display is not angle dependent
• C) Has higher frame rates than Color Doppler
• D) Limited to superficial structures
Correct Answer: B) Color display is not angle dependent
Rationale: Power Doppler displays flow intensity based on amplitude, making it less
sensitive to the angle of insonation compared to conventional Color Doppler.
9. Which of the following lists the normal range of intensities used in diagnostic
Doppler ultrasound?
• A) 1-10 mW/cm²
, • B) 10-100 mW/cm²
• C) 0.2-400 mW/cm²
• D) 100-500 mW/cm²
Correct Answer: C) 0.2-400 mW/cm²
Rationale: Doppler ultrasound uses intensities within the range of 0.2-400 mW/cm²,
depending on the type of diagnostic application.
10. Snell's law describes what acoustic principle?
• A) Reflection
• B) Refraction
• C) Diffusion
• D) Absorption
Correct Answer: B) Refraction
Rationale: Snell’s law describes the bending of sound waves as they pass through media
with different propagation speeds, which is known as refraction.
11. If a 7 MHz wave is transmitted through the media listed below, the shortest
wavelength will be seen in the wave moving through:
• A) Air
• B) Bone
• C) Water
• D) Muscle
Correct Answer: A) Air
Rationale: The speed of sound is slowest in air, which results in the shortest wavelength
for a given frequency.
12. Which system component is not needed when an LCD monitor is used?
• A) Analog-to-digital converter
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