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Web-based Sonography Principles and Instrumentation (SPI) practice test of Exams4sures is accessible from any place. You merely need an active internet connection to take this ARDMS SPI practice exam. Browsers including MS Edge, Internet Explorer, Safari, Opera, Chrome, and Firefox support this Sonography Principles and Instrumentation (SPI) practice exam. Additionally, this Sonography Principles and Instrumentation (SPI) test is supported by operating systems including Android, Mac, iOS, Windows, and Linux.

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q101-Q106):

NEW QUESTION # 101
What is measured with a test object containing closely spaced, highly reflective targets along the direction of beam?

A. Sensitivity
B. Specificity
C. Axial resolution
D. Lateral resolution

Answer: C

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Axial resolution is the system's ability to distinguish two structures located along the direction of the ultrasound beam (parallel to the beam axis). Test objects or phantoms contain closely spaced pins or reflectors along this axis to evaluate axial resolution.
Principles and Instrumentation state:
"Axial resolution is determined by the spatial pulse length and is tested using targets positioned along the beam axis."
* Sensitivity (A) relates to detection of weak echoes.
* Specificity (B) refers to diagnostic accuracy, not phantom testing.
* Lateral resolution (C) is evaluated using side-by-side (perpendicular) targets.
Therefore, the correct answer is D: Axial resolution.
-

NEW QUESTION # 102
Which feature is a characteristic of write magnification?

A. New data acquisition
B. Post-processing
C. Decreased spatial resolution
D. Larger pixel size

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Write magnification acquires new data over the smaller field of view with a higher number of scan lines, improving spatial resolution.
Principles and Instrumentation state:
"Write magnification rescans the selected region with new data acquisition, increasing the number of pixels and improving resolution."
* Post-processing (A) applies to read magnification.
* Larger pixel size (C) would decrease resolution.
* Write magnification improves, not decreases (D), spatial resolution.
Therefore, the correct answer is B: New data acquisition.
-

NEW QUESTION # 103
Which transducer was most likely used to create this image?

A. Curvilinear
B. Endocavity
C. Phased array
D. Linear array

Answer: A

Explanation:
The image shown is typical of an abdominal ultrasound, which commonly utilizes a curvilinear transducer. Curvilinear transducers have a wider field of view at depth, making them ideal for imaging large structures within the abdomen. These transducers emit a curved beam, allowing for better penetration and a broader field of view, which is necessary for comprehensive abdominal examinations. The curvature of the image, the wide field of view, and the depth of penetration all suggest the use of a curvilinear transducer.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

NEW QUESTION # 104
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 spectral Doppler gain.
D. Decrease the Doppler pulse repetition frequency.

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 # 105
What is the function of M-mode?

A. Create 3D images
B. Measure movement
C. Monitor blood flow
D. Visualize internal organs

Answer: B

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 # 106
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