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ARDMS SPI Mock Exam Expertly Crafted Questions & Detailed Explanations for Guaranteed Success
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ARDMS SPI Mock Exam Expertly Crafted Questions & Detailed Explanations for Guaranteed Success
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ARDMS SPI Mock Exam Expertly Crafted Questions& Detailed Explanations for Guaranteed Success
What percentage of the time is a typical pulsed ultrasound system capable of
receiving echoes?
• A) 10%
• B) 50%
• C) 90%
• D) 99.9%
Correct Answer: D) 99.9%
Rationale: Pulsed ultrasound systems spend the vast majority of the time receiving echoes
rather than transmitting sound pulses.
2. If the frequency doubles, what happens to the wavelength?
• A) Doubles
• B) Stays the same
• C) Decreases by half
• D) Increases by half
Correct Answer: C) Decreases by half
Rationale: Wavelength is inversely proportional to frequency, so when frequency doubles,
the wavelength is halved.
3. Which of the following does not display a sector format?
• A) Linear-sequenced array
• B) Electronic-phased array
• C) Mechanical rotating wheel
• D) Mechanical wobbler
,Correct Answer: A) Linear-sequenced array
Rationale: The linear-sequenced array transducer produces a rectangular image, not a
sector format like the other transducers listed.
4. Z = ρV represents the formula for:
• A) Frequency
• B) Intensity
• C) Impedance
• D) Wavelength
Correct Answer: C) Impedance
Rationale: Impedance (Z) is calculated by multiplying the density (ρ) of a medium by the
velocity (V) of sound through it.
5. Which of the following is most commonly used in ultrasound transducers?
• A) Lead zirconate titanate (PZT)
• B) Barium sulfate
• C) Metaniobate
• D) Quartz
Correct Answer: A) Lead zirconate titanate (PZT)
Rationale: PZT is the most commonly used piezoelectric material in ultrasound
transducers.
6. Transmit-delay focusing in a linear array transducer will:
• A) Improve axial resolution
• B) Improve lateral resolution
• C) Decrease frame rate
• D) Increase pulse duration
,Correct Answer: B) Improve lateral resolution
Rationale: Transmit-delay focusing improves lateral resolution by focusing the sound
beam at specific depths.
7. For real-time systems, which of the following is not related to the other?
• A) Frame rate
• B) Lines per frame
• C) Pulse repetition frequency
• D) Frequency
Correct Answer: D) Frequency
Rationale: Frame rate, lines per frame, and pulse repetition frequency (PRF) are all related
to real-time imaging, but transducer frequency is not directly related to these parameters.
8. The pulse repetition frequency is:
• A) The number of cycles per second
• B) The time it takes for one pulse to return
• C) The number of pulses emitted per second
• D) The depth of the imaging field
Correct Answer: C) The number of pulses emitted per second
Rationale: Pulse repetition frequency (PRF) is the number of pulses the transducer emits
per second.
9. Which of the following is not a role of the pulser?
• A) Driving the transducer
• B) Telling the receiver when ultrasound pulses are produced
• C) Telling memory when ultrasound pulses are produced
• D) Beam steering
, Correct Answer: D) Beam steering
Rationale: Beam steering is typically controlled by the beam former, not the pulser.
10. Demodulation is a process of:
• A) Increasing the frequency of the transmitted signal
• B) Converting the voltage delivered to the receiver from one form to another
• C) Adjusting the pulse duration
• D) Changing the beam direction
Correct Answer: B) Converting the voltage delivered to the receiver from one form to
another
Rationale: Demodulation involves converting the modulated signal back into a form
suitable for display, typically by extracting the signal's envelope.
11. Which of the following are not operator adjustable?
• A) Compensation & rejection
• B) Amplification & compensation
• C) Demodulation & compression
• D) Rejection & amplification
Correct Answer: C) Demodulation & compression
Rationale: Demodulation and compression are system processes that occur automatically
and are not adjustable by the operator.
12. Which of the following varies with distance from the transducer?
• A) Lateral resolution
• B) Frequency
• C) Axial resolution
• D) Spatial pulse length
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