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Most Probable Real Exam Questions in SPI Sonography Principles and Instrumentation PDF Dumps Format

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q72-Q77):

NEW QUESTION # 72
Which characteristic of ultrasound transmission is directly proportional to an increase in frequency?

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
As frequency increases, attenuation (energy loss due to absorption, scattering, and reflection) also increases. This limits penetration but improves resolution for superficial structures.
According to sonography instrumentation reference:
"Attenuation increases directly with frequency, limiting penetration but enhancing resolution in superficial imaging." Therefore, the correct answer is C: Attenuation.
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NEW QUESTION # 73
Which action would increase the frame rate?

Answer: B

Explanation:
The frame rate in ultrasound imaging is influenced by several factors, including the number of focal zones. Each focal zone requires additional transmission and reception cycles, thus decreasing the frame rate. By decreasing the number of focal zones, the system requires fewer cycles per frame, which increases the frame rate. This enhances the temporal resolution, making it easier to capture fast-moving structures in real-time imaging.
Reference:
ARDMS Sonography Principles & Instrumentation Guidelines
Hagen-Ansert SL. Textbook of Diagnostic Ultrasonography. 8th ed. St. Louis, MO: Mosby; 2017.


NEW QUESTION # 74
Which parameters determine the propagation speed of sound in a medium?

Answer: A

Explanation:
The propagation speed of sound in a medium is determined by the medium's elasticity and density. Elasticity refers to the ability of the medium to return to its original shape after deformation, while density is the mass per unit volume of the medium. The speed of sound increases with higher elasticity and decreases with higher density. This relationship is described by the equation ????=????????v=ρE, where ????v is the propagation speed, ????E is the elasticity (or modulus of elasticity), and ????ρ is the density.
Reference
ARDMS Sonography Principles and Instrumentation (SPI) Exam Study Guide
"Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau


NEW QUESTION # 75
What is assessed with power Doppler?

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Power Doppler detects the strength (amplitude) of returning Doppler signals, which reflects the presence of flow regardless of direction or velocity. It is more sensitive to low-velocity flow and is less angle-dependent than conventional color Doppler.
Principles and Instrumentation state:
"Power Doppler displays the amplitude of Doppler shifts, representing the presence of flow. It does not display direction or velocity." Laminar flow (A) and velocity (C) are not specifically measured by power Doppler.
Viscosity (D) cannot be assessed by Doppler ultrasound.
Therefore, the correct answer is B: Presence of flow.
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NEW QUESTION # 76
Which target group in this image of a tissue-mimicking phantom is used to evaluate axial resolution?

Answer: B

Explanation:
In the given image of a tissue-mimicking phantom, Option B (yellow box) is used to evaluate axial resolution. Axial resolution refers to the ability of the ultrasound system to distinguish between two structures that are close to each other along the path of the ultrasound beam (i.e., parallel to the beam). The targets in Option B are typically aligned in such a way to test the system's capacity to differentiate between structures that are situated closely together along the beam's axis. Reference:
ARDMS Sonography Principles and Instrumentation guidelines
"Sonography: Principles and Instruments" by Joan P. Baker and Marveen Craig


NEW QUESTION # 77
......

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