ARDMS SPI EXAM DUMPS - PASS YOUR EXAM IN FIRST ATTEMPT [2025]

ARDMS SPI Exam Dumps - Pass Your Exam In First Attempt [2025]

ARDMS SPI Exam Dumps - Pass Your Exam In First Attempt [2025]

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q81-Q86):

NEW QUESTION # 81
Which adjustment would reduce the noise in the Doppler waveform in this image?

  • A. Decreasing Doppler gain
  • B. Increasing the gate size
  • C. Decreasing velocity scale
  • D. Increasing sweep speed

Answer: A

Explanation:
Noise in the Doppler waveform can often be attributed to excessive gain settings. Decreasing the Doppler gain reduces the amplification of both the signal and the noise, thus providing a clearer and more accurate Doppler waveform. Excessive gain can cause speckling and clutter, which obscure the true Doppler signals. By reducing the gain, the noise level is minimized, resulting in a cleaner Doppler signal representation.
Reference:
ARDMS Sonography Principles & Instrumentation Guidelines
Hagen-Ansert SL. Textbook of Diagnostic Ultrasonography. 8th ed. St. Louis, MO: Mosby; 2017.


NEW QUESTION # 82
Which adjustment is needed to optimize the waveform below?

  • A. Lower baseline
  • B. Decrease gain
  • C. Increase wall filter
  • D. Increase pulse repetition frequency

Answer: A

Explanation:
The waveform in the image shows spectral Doppler signals that are pushed against the upper limit of the display, indicating that the baseline is too high. Lowering the baseline allows for a better visual representation of the entire Doppler signal within the available display range. This adjustment prevents the waveform from being cut off and helps in accurately interpreting the blood flow characteristics.
Reference:
ARDMS Sonography Principles & Instrumentation Guidelines
Kremkau FW. Sonography Principles and Instruments. 9th ed. Philadelphia, PA: Elsevier; 2016.


NEW QUESTION # 83
Which target group in this image of a tissue-mimicking phantom is used for gray-scale evaluation?

  • A. Option A
  • B. Option C
  • C. Option B
  • D. Option D

Answer: B

Explanation:
Gray-scale evaluation in a tissue-mimicking phantom involves assessing the uniformity and accuracy of the gray-scale representation of the tissues.
Option C typically contains structures designed to test the machine's ability to accurately depict varying levels of echogenicity, which is essential for proper gray-scale evaluation.
This area will have a range of echo intensities that help in determining the contrast resolution and the ability of the system to distinguish between different tissue types based on their gray-scale values. Reference:
ARDMS Sonography Principles and Instrumentation guidelines on tissue-mimicking phantoms and image quality evaluation.


NEW QUESTION # 84
Which factor influences color flow imaging frame rate?

  • A. Filter selection
  • B. Variance map selection
  • C. Dynamic range
  • D. Line density

Answer: D

Explanation:
The frame rate in color flow imaging is influenced by several factors, one of the most significant being line density. Line density refers to the number of ultrasound lines used to create an image. Increasing line density improves spatial resolution but requires more time to acquire each frame, thereby reducing the frame rate. Other factors such as filter selection, dynamic range, and variance map selection can affect the quality of the color flow image, but they do not have as direct an impact on frame rate as line density does.
Reference: ARDMS Sonography Principles and Instrumentation, Chapter on Color Doppler Imaging.


NEW QUESTION # 85
Which control should a sonographer use to change contrast resolution?

  • A. Dynamic range
  • B. Reject
  • C. Output power
  • D. Gain

Answer: A

Explanation:
Reject: This control eliminates low-level noise and weak signals, affecting image quality but not primarily used for contrast resolution.
Output Power: This adjusts the intensity of the transmitted ultrasound waves but does not directly change contrast resolution.
Gain: This control amplifies all signals equally, affecting brightness but not specifically the contrast resolution.
Dynamic Range: Adjusting the dynamic range changes the range of grayscale that the ultrasound system displays, which directly affects the contrast resolution by altering how many shades of gray are visible between the black and white extremes.
Reference:
"Understanding Ultrasound Physics" by Sidney K. Edelman
ARDMS Sonography Principles and Instrumentation study materials


NEW QUESTION # 86
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