AVIES SPI REVIEW EXAM STUDY GUIDE 2026 COMPLETE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS RECENT VERSION

AVIES SPI REVIEW EXAM STUDY GUIDE 2026
COMPLETE QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS <RECENT
VERSION>


AVIES SPI REVIEW EXAM STUDY GUIDE 2026
Section 1: Ultrasound Principles and Pulse-Echo Instrumentation
1. What is the primary principle behind diagnostic ultrasound imaging?
a) Radiation emission from tissues
b) Magnetic resonance of protons
c) Reflection of sound waves from tissue interfaces
d) Absorption of X-rays by different tissues
Answer: c) Reflection of sound waves from tissue interfaces
2. Which of the following best defines a piezoelectric material?
a) A material that changes temperature when voltage is applied.
b) A material that produces a voltage when deformed by pressure, and vice-versa.
c) A material that is highly conductive to electricity.
d) A material that emits light when sound waves hit it.
Answer: b) A material that produces a voltage when deformed by pressure,
and vice-versa.
3. What is the typical operating frequency range for diagnostic ultrasound?
a) 1 Hz - 20,000 Hz
b) 2 MHz - 15 MHz
c) 1 kHz - 100 kHz
d) 20 MHz - 100 MHz
Answer: b) 2 MHz - 15 MHz
4. The pulser within an ultrasound system is primarily responsible for:
a) Receiving the returning echoes.
b) Amplifying weak signals.
c) Determining the output frequency of the transducer.

,d) Generating the electrical voltage that drives the transducer.
Answer: d) Generating the electrical voltage that drives the transducer.
5. What component of the ultrasound system performs the function of time-
gain compensation (TGC)?
a) The Pulser
b) The Receiver
c) The Transducer
d) The Display
Answer: b) The Receiver
6. The primary purpose of the receiver's amplifier is to:
a) Decrease the dynamic range of the signals.
b) Increase the amplitude of all returning echo voltages.
c) Convert the analog signals to digital.
d) Filter out noise based on frequency.
Answer: b) Increase the amplitude of all returning echo voltages.
7. Which receiver function corrects for the attenuation of sound waves as they
travel deeper into tissue?
a) Demodulation
b) Rejection
c) Compression
d) Time Gain Compensation (TGC)
Answer: d) Time Gain Compensation (TGC)
8. The process of smoothing out the "bumpy" appearance of an echo signal in
the receiver is called:
a) Rejection
b) Demodulation
c) Amplification
d) Compression
Answer: b) Demodulation
9. What is the function of the scan converter in a digital ultrasound system?
a) To power the transducer.

, b) To process the Doppler signals.
c) To store image data and convert it from a scan format to a video format for
display.
d) To filter out harmonic frequencies.
Answer: c) To store image data and convert it from a scan format to a video
format for display.
10. Which display mode presents depth on the y-axis and echo amplitude on
the x-axis?
a) A-Mode
b) B-Mode
c) M-Mode
d) Color Doppler Mode
Answer: a) A-Mode


Section 2: Transducers and Beam Formation
11. The thickness of the piezoelectric crystal is most directly related to what
property of the ultrasound beam?
a) Beam Width
b) Operating Frequency
c) Focal Depth
d) Frame Rate
Answer: b) Operating Frequency
12. What is the primary purpose of the matching layer on a transducer?
a) To protect the crystal from damage.
b) To electrically insulate the patient.
c) To reduce the acoustic impedance difference between the crystal and the skin.
d) To focus the ultrasound beam.
Answer: c) To reduce the acoustic impedance difference between the crystal
and the skin.
13. The region from the transducer face to the focal point is called the:
a) Far Zone