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[Hardware] SPI Test Duration - 100% Valid Questions Pool

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【Hardware】 SPI Test Duration - 100% Valid Questions Pool

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ARDMS SPI Exam Syllabus Topics:
TopicDetails
Topic 1
  • 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 2
  • 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.
Topic 3
  • 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 4
  • 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 5
  • 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.

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q98-Q103):NEW QUESTION # 98
Which setting improves temporal resolution?
  • A. Increased depth
  • B. Multiple focal zones
  • C. Wide sector size
  • D. Low line density
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Temporal resolution reflects how quickly frames are updated (frame rate). Reducing the number of scan lines per frame (low line density) decreases acquisition time, thus increasing frame rate and improving temporal resolution.
According to sonography instrumentation reference:
"Lower line density allows for faster frame rates, improving temporal resolution at the expense of spatial resolution." Therefore, the correct answer is D: Low line density.

NEW QUESTION # 99
Which system control adjusts amplification of signals as a function of depth?
  • A. Output power
  • B. Time gain compensation
  • C. Transmit focus
  • D. Reject
Answer: B
Explanation:
Time Gain Compensation (TGC), also known as Depth Gain Compensation (DGC), is used to adjust the amplification of ultrasound signals based on their depth. As ultrasound waves travel deeper into the tissue, they become weaker due to attenuation. TGC compensates for this attenuation by progressively increasing the gain for deeper echoes, ensuring that structures at different depths appear with similar brightness on the ultrasound image. This function is critical for creating a uniform image and accurately visualizing deeper anatomical structures.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

NEW QUESTION # 100
Which is a method to reduce noise?
  • A. Increase persistence
  • B. Decrease depth
  • C. Increase frequency
  • D. Decrease beam width
Answer: A
Explanation:
Persistence is a form of temporal averaging where consecutive frames are averaged to reduce random noise, resulting in a smoother image. Increasing persistence effectively reduces noise by averaging out transient noise artifacts while preserving the true signal. This improves image quality, although it may also reduce the temporal resolution, making it less suitable for rapidly moving structures.
Reference:
ARDMS Sonography Principles & Instrumentation Guidelines
Hedrick WR, Hykes DL, Starchman DE. Ultrasound Physics and Instrumentation. 4th ed. Philadelphia, PA: Elsevier Saunders; 2005.

NEW QUESTION # 101
In addition to velocity, which factor affects acoustic impedance?
  • A. Transducer frequency
  • B. Attenuation coefficient
  • 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 # 102
What occurs when the pulse repetition frequency is less than twice the Doppler shift frequency?
  • A. Aliasing
  • B. Propagation speed artifact
  • C. Range ambiguity
  • D. Spectral broadening
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Aliasing happens in Doppler ultrasound when the Doppler shift frequency exceeds half of the pulse repetition frequency (the Nyquist limit). When PRF is too low for the measured Doppler shift, the signal wraps around, producing aliasing.
According to sonography instrumentation reference:
"Aliasing occurs when the Doppler shift frequency exceeds one-half the pulse repetition frequency (Nyquist limit). This results in incorrect display of flow direction and velocity." Therefore, the correct answer is C: Aliasing.
-

NEW QUESTION # 103
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