ARDMS SPI EXAM LATEST REAL
EXAM 150 QUESTIONS AND
CORRECT ANSWERS | A GRADE |
BRAND NEW VERSION
Core Domains
Physical Principles
Ultrasound Transducers
Pulse-Echo Instrumentation and Imaging Principles
Doppler Principles and Hemodynamics
Image Artifacts
Quality Assurance
Bioeffects and Safety
Image Optimization and New Technology
Introduction
The ARDMS Sonography Principles and Instrumentation examination is
a foundational certification test required for all ARDMS specialty
credentials. This assessment evaluates knowledge of ultrasound physics,
transducer operation, pulse-echo instrumentation, Doppler principles,
hemodynamics, image artifacts, bioeffects, safety, and quality assurance.
Questions are presented in multiple-choice and scenario-based formats
emphasizing real-world application and clinical decision-making.
Candidates must demonstrate understanding of sound wave propagation,
acoustic parameters, beam formation, and optimization techniques. The
exam consists of one hundred ten multiple-choice questions
administered over two hours, with a minimum scaled score of five
hundred fifty-five required to pass.
,SECTION ONE: QUESTIONS 1–150
1. Which of the following best describes the relationship between
frequency and period?
A. They are directly related
B. They are inversely related
C. They are unrelated
D. They are equal in value
B. They are inversely related
RATIONALE: Frequency and period are reciprocals of each other.
As frequency increases, the period decreases proportionally, and vice
versa.
2. What is the propagation speed of sound in soft tissue?
A. 1,000 m/s
B. 1,540 m/s
C. 3,500 m/s
D. 408 m/s
B. 1,540 m/s
RATIONALE: The average propagation speed of ultrasound in soft
tissue is 1,540 meters per second, or 1.54 millimeters per microsecond.
,3. Which acoustic parameter is determined by both the sound source
and the medium?
A. Frequency
B. Period
C. Wavelength
D. Amplitude
C. Wavelength
RATIONALE: Wavelength is determined by both the frequency of
the sound source and the propagation speed of the medium. Frequency
and period are determined only by the source.
4. What is the unit of measurement for acoustic impedance?
A. Decibels
B. Rayls
C. Watts per square centimeter
D. Pascals
B. Rayls
RATIONALE: Acoustic impedance is measured in Rayls. It is
calculated as the product of density and propagation speed.
5. If the stiffness of a medium increases, what happens to the
propagation speed of sound through that medium?
A. It decreases
, B. It remains unchanged
C. It increases
D. It becomes zero
C. It increases
RATIONALE: Propagation speed is directly related to the stiffness
of the medium. As stiffness increases, the speed of sound through the
medium increases.
6. Which of the following correctly describes a longitudinal wave?
A. Particle motion is perpendicular to wave direction
B. Particle motion is parallel to wave direction
C. There is no particle motion
D. Particles move in a circular pattern
B. Particle motion is parallel to wave direction
RATIONALE: In a longitudinal wave, particles of the medium
vibrate in the same direction that the wave propagates. Ultrasound waves
are longitudinal waves.
7. What is the duty factor of continuous wave ultrasound?
A. 0 percent
B. 50 percent
C. 100 percent
D. 25 percent
EXAM 150 QUESTIONS AND
CORRECT ANSWERS | A GRADE |
BRAND NEW VERSION
Core Domains
Physical Principles
Ultrasound Transducers
Pulse-Echo Instrumentation and Imaging Principles
Doppler Principles and Hemodynamics
Image Artifacts
Quality Assurance
Bioeffects and Safety
Image Optimization and New Technology
Introduction
The ARDMS Sonography Principles and Instrumentation examination is
a foundational certification test required for all ARDMS specialty
credentials. This assessment evaluates knowledge of ultrasound physics,
transducer operation, pulse-echo instrumentation, Doppler principles,
hemodynamics, image artifacts, bioeffects, safety, and quality assurance.
Questions are presented in multiple-choice and scenario-based formats
emphasizing real-world application and clinical decision-making.
Candidates must demonstrate understanding of sound wave propagation,
acoustic parameters, beam formation, and optimization techniques. The
exam consists of one hundred ten multiple-choice questions
administered over two hours, with a minimum scaled score of five
hundred fifty-five required to pass.
,SECTION ONE: QUESTIONS 1–150
1. Which of the following best describes the relationship between
frequency and period?
A. They are directly related
B. They are inversely related
C. They are unrelated
D. They are equal in value
B. They are inversely related
RATIONALE: Frequency and period are reciprocals of each other.
As frequency increases, the period decreases proportionally, and vice
versa.
2. What is the propagation speed of sound in soft tissue?
A. 1,000 m/s
B. 1,540 m/s
C. 3,500 m/s
D. 408 m/s
B. 1,540 m/s
RATIONALE: The average propagation speed of ultrasound in soft
tissue is 1,540 meters per second, or 1.54 millimeters per microsecond.
,3. Which acoustic parameter is determined by both the sound source
and the medium?
A. Frequency
B. Period
C. Wavelength
D. Amplitude
C. Wavelength
RATIONALE: Wavelength is determined by both the frequency of
the sound source and the propagation speed of the medium. Frequency
and period are determined only by the source.
4. What is the unit of measurement for acoustic impedance?
A. Decibels
B. Rayls
C. Watts per square centimeter
D. Pascals
B. Rayls
RATIONALE: Acoustic impedance is measured in Rayls. It is
calculated as the product of density and propagation speed.
5. If the stiffness of a medium increases, what happens to the
propagation speed of sound through that medium?
A. It decreases
, B. It remains unchanged
C. It increases
D. It becomes zero
C. It increases
RATIONALE: Propagation speed is directly related to the stiffness
of the medium. As stiffness increases, the speed of sound through the
medium increases.
6. Which of the following correctly describes a longitudinal wave?
A. Particle motion is perpendicular to wave direction
B. Particle motion is parallel to wave direction
C. There is no particle motion
D. Particles move in a circular pattern
B. Particle motion is parallel to wave direction
RATIONALE: In a longitudinal wave, particles of the medium
vibrate in the same direction that the wave propagates. Ultrasound waves
are longitudinal waves.
7. What is the duty factor of continuous wave ultrasound?
A. 0 percent
B. 50 percent
C. 100 percent
D. 25 percent
