DAVIES SPI: II. Physical Principles (20%
of ARDMS) Exam 2026 Questions and
Answers
You have increased the transmit power while performing a pelvic ultrasound
examination. This action increases which of the following?
A. Penetration
B. Acoustic power
C. Image brightness
D. Voltage applied to the transducer elements
E. All of the above - Correct answer-E. All of the above
Attenuation of the sound beam increases with increasing:
A. Path length
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,B. Absorption
C. Frequency
D. Scattering and reflection
E. All of the above - Correct answer-E. All of the above
<The attenuation coefficient is the degree of attenuation for each centimeter of
sound propagation. Anything that increases attenuation will increase the
attenuation coefficient>
Which prefix equals 10^(-3)?
A. Micro
B. Milli
C. Mega
D. Centi
E. None of the above - Correct answer-B. Milli
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,<Micro is 10^(-6), mega is 10^6, and centi is 10^(-2)>
You are imaging with a 5 MHz linear array transducer. What sound parameter stays
constant as the beam propagates through the tissue?
A. Frequency
B. Intensity
C. Amplitude
D. Wavelength
E. None of the above - Correct answer-E. None of the above
<As sound propagates through tissue, high frequencies are attenuated more rapidly
than low frequencies. This results in a shifting toward the lower frequencies in the
transmitted bandwidth with increasing depth. The intensity and amplitude of the
beam decrease as a result of attenuation. The wavelength is altered with the
downshifting of the overall frequency bandwidth>
The time that it takes for one pulse to occur is known as the:
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, A. Duty factor
B. Spatial pulse length
C. Wavelength
D. Pulse repetition frequency
E. Pulse duration - Correct answer-E. Pulse duration
Which statement about the two pulse trains displayed below is true? Each
represents a signal vs time.
A. A has a lower frequency than B
B. B has a longer period than A
C. A has a shorter wavelength than B
D. A has a better axial resolution than B
E. A has a shorter spatial pulse length than B
Image A: radio waves
Image B: gamma rays - Correct answer-A. A has a lower frequency than B
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of ARDMS) Exam 2026 Questions and
Answers
You have increased the transmit power while performing a pelvic ultrasound
examination. This action increases which of the following?
A. Penetration
B. Acoustic power
C. Image brightness
D. Voltage applied to the transducer elements
E. All of the above - Correct answer-E. All of the above
Attenuation of the sound beam increases with increasing:
A. Path length
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,B. Absorption
C. Frequency
D. Scattering and reflection
E. All of the above - Correct answer-E. All of the above
<The attenuation coefficient is the degree of attenuation for each centimeter of
sound propagation. Anything that increases attenuation will increase the
attenuation coefficient>
Which prefix equals 10^(-3)?
A. Micro
B. Milli
C. Mega
D. Centi
E. None of the above - Correct answer-B. Milli
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
,<Micro is 10^(-6), mega is 10^6, and centi is 10^(-2)>
You are imaging with a 5 MHz linear array transducer. What sound parameter stays
constant as the beam propagates through the tissue?
A. Frequency
B. Intensity
C. Amplitude
D. Wavelength
E. None of the above - Correct answer-E. None of the above
<As sound propagates through tissue, high frequencies are attenuated more rapidly
than low frequencies. This results in a shifting toward the lower frequencies in the
transmitted bandwidth with increasing depth. The intensity and amplitude of the
beam decrease as a result of attenuation. The wavelength is altered with the
downshifting of the overall frequency bandwidth>
The time that it takes for one pulse to occur is known as the:
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
, A. Duty factor
B. Spatial pulse length
C. Wavelength
D. Pulse repetition frequency
E. Pulse duration - Correct answer-E. Pulse duration
Which statement about the two pulse trains displayed below is true? Each
represents a signal vs time.
A. A has a lower frequency than B
B. B has a longer period than A
C. A has a shorter wavelength than B
D. A has a better axial resolution than B
E. A has a shorter spatial pulse length than B
Image A: radio waves
Image B: gamma rays - Correct answer-A. A has a lower frequency than B
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