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[Hardware] Valid SPI Test Prep - SPI Valid Practice Questions

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【Hardware】 Valid SPI Test Prep - SPI Valid Practice Questions

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ARDMS SPI Exam Syllabus Topics:
TopicDetails
Topic 1
  • Perform Ultrasound Examinations: This section of the exam measures skills of Sonographers and covers how to conduct ultrasound procedures while ensuring patient safety and diagnostic accuracy. It includes understanding of imaging protocols, ergonomics, patient care, and the interaction between sound and tissue. Candidates are expected to demonstrate abilities to manage patient encounters, apply 3D
  • 4D and contrast imaging concepts, identify and correct artifacts, and follow confidentiality and privacy standards throughout the scanning process.
Topic 2
  • Optimize Sonographic Images: This section of the exam measures skills of Diagnostic Medical Sonographers and assesses their ability to enhance image quality using advanced optimization techniques. It includes understanding axial, lateral, elevational, and temporal resolution, as well as manipulating gain, depth, magnification, and dynamic range. Examinees are expected to apply harmonic imaging, spatial compounding, and gray-scale techniques to produce clear, accurate diagnostic images.
Topic 3
  • Manage Ultrasound Transducers: This section of the exam measures skills of Ultrasound Technicians and focuses on the management and proper use of different types of transducers. It evaluates knowledge of transducer components, frequency selection, and application of various 2D, 3D, 4D, and nonimaging transducer concepts. Candidates must show they can choose the appropriate transducer for specific examinations and make necessary frequency adjustments to ensure image quality.
Topic 4
  • Provide Clinical Safety and Quality Assurance: This section of the exam measures skills of Clinical Ultrasound Supervisors and focuses on maintaining safety and quality standards in ultrasound practice. It includes infection control protocols, transducer and machine integrity checks, and quality assurance testing using tissue-mimicking phantoms. The section also requires familiarity with statistical parameters like sensitivity and specificity to evaluate diagnostic performance and ensure consistent, reliable imaging outcomes.
Topic 5
  • Apply Doppler Concepts: This section of the exam measures skills of Vascular Sonographers and evaluates understanding and application of Doppler ultrasound principles. It includes knowledge of Doppler angle, flow dynamics, and color and spectral Doppler imaging. The section also covers eliminating aliasing, interpreting waveforms, applying continuous and pulsed wave Doppler, and optimizing Doppler gain and scale to accurately measure blood flow and velocity within vessels.

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q90-Q95):NEW QUESTION # 90
What method can be used to resolve aliasing artifact?
  • A. Using a higher frequency transducer
  • B. Decreasing the pulse repetition frequency
  • C. Using continuous wave Doppler ultrasound
  • D. Adjusting the output power
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Continuous wave (CW) Doppler can measure very high velocities without aliasing because it does not have a Nyquist limit like pulsed-wave Doppler.
Principles and Instrumentation state:
"Aliasing is eliminated in continuous wave Doppler since it does not rely on sampling and has no upper velocity limit."
* Output power (A) affects signal strength, not aliasing.
* Higher frequency (B) increases aliasing susceptibility.
* Decreasing PRF (C) actually worsens aliasing.
Therefore, the correct answer is D: Using continuous wave Doppler ultrasound.
-

NEW QUESTION # 91
What is the function of M-mode?
  • A. Measure movement
  • B. Create 3D images
  • C. Monitor blood flow
  • D. Visualize internal organs
Answer: A
Explanation:
M-mode (Motion mode) is used in ultrasound to measure and display the movement of structures over time.
This mode is particularly useful in cardiac imaging to assess the motion of heart walls and valves.
M-mode provides a one-dimensional view of the motion of tissues and is often used in conjunction with 2D imaging for a comprehensive assessment.
It is essential in evaluating the dynamic function of organs, especially in cardiology, where precise measurements of cardiac structures' movement are crucial. Reference:
ARDMS Sonography Principles and Instrumentation guidelines on modes of ultrasound imaging and their clinical applications.

NEW QUESTION # 92
Which component of a contrast agent causes a marked mismatch in impedance between the agent and blood?
  • A. Gas
  • B. Solid
  • C. Serous liquid
  • D. Viscous liquid
Answer: A
Explanation:
Contrast agents used in ultrasound imaging typically consist of microbubbles filled with gas. The significant mismatch in acoustic impedance between the gas in the microbubbles and the surrounding blood creates strong reflectors of the ultrasound waves, enhancing the echogenicity of blood and improving the visibility of blood flow and tissue perfusion. The high contrast provided by the gas-filled microbubbles makes them particularly effective as ultrasound contrast agents.
Reference:
ARDMS Sonography Principles & Instrumentation Guidelines
Kremkau FW. Sonography Principles and Instruments. 9th ed. Philadelphia, PA: Elsevier; 2016.

NEW QUESTION # 93
In addition to velocity, which factor affects acoustic impedance?
  • A. Attenuation coefficient
  • B. Transducer frequency
  • C. Tissue density
  • D. Penetration depth
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Acoustic impedance (Z) is determined by the product of tissue density (#) and propagation speed (c), expressed as:
Z = # × c
According to Principles and Instrumentation:
"Acoustic impedance is a property of the tissue, determined by its density and the speed of sound through it."
* Penetration depth (A) does not affect impedance directly.
* Attenuation coefficient (B) affects signal loss, not impedance.
* Transducer frequency (D) is independent of tissue impedance.
Therefore, the correct answer is C: Tissue density.
-

NEW QUESTION # 94
Which pulsed-wave Doppler adjustment would be appropriate to correct the aliasing seen in this image?

  • A. Increase the Doppler pulse repetition frequency.
  • B. Increase the spectral Doppler gain.
  • C. Decrease the Doppler pulse repetition frequency.
  • D. Decrease the spectral Doppler gain.
Answer: A
Explanation:
Aliasing in pulsed-wave Doppler occurs when the sampled Doppler frequency exceeds the Nyquist limit, which is half of the pulse repetition frequency (PRF). This results in an incorrect representation of the blood flow velocities, causing the waveform to wrap around and appear on the opposite side of the baseline. To correct aliasing, the PRF should be increased, which raises the Nyquist limit and allows for accurate measurement of higher velocities without aliasing. Increasing the PRF effectively reduces the likelihood of aliasing artifacts in the Doppler signal.
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

NEW QUESTION # 95
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