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ARDMS SPI Exam Questions | Reduce Your Fear in Final Exam

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Quiz 2025 Unparalleled ARDMS SPI: Sonography Principles and Instrumentation Latest Braindumps Ebook

TestPDF offers an extensive collection of SPI practice questions in PDF format. This ARDMS SPI Exam Questions pdf file format is simple to use and can be accessed on any device, including a desktop, tablet, laptop, Mac, or smartphone. No matter where you are, you can learn on the go. The PDF version of the Sonography Principles and Instrumentation (SPI) exam questions is also easily printable, allowing you to keep physical copies of the Sonography Principles and Instrumentation (SPI) questions dumps with you at all times.

ARDMS Sonography Principles and Instrumentation Sample Questions (Q57-Q62):

NEW QUESTION # 57
Which artifact results from decreased attenuation?

A. Ringdown
B. Enhancement
C. Comet tail
D. Reverberation

Answer: B

Explanation:
Enhancement is an artifact that results from decreased attenuation. When an ultrasound wave travels through a medium with lower attenuation compared to surrounding tissues, it loses less energy. Consequently, the structures located deeper than the low-attenuation medium appear brighter on the ultrasound image. This artifact is commonly observed behind fluid-filled structures, such as cysts or the urinary bladder, where the sound waves encounter minimal resistance and thus less attenuation. Reference:
ARDMS Sonography Principles and Instrumentation guidelines
"Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau

NEW QUESTION # 58
Which adjustment resolves spectral Doppler aliasing?

A. Decrease transducer frequency
B. Increase sweep speed
C. Decrease velocity scale
D. Increase time gain compensation

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Reducing transducer frequency lowers the Doppler shift for a given velocity (since Doppler shift is directly proportional to frequency), which helps avoid aliasing when high velocities are present.
According to sonography instrumentation reference:
"Lowering the transducer frequency decreases Doppler shift, reducing the likelihood of aliasing." Therefore, the correct answer is C: Decrease transducer frequency.

NEW QUESTION # 59
Which factor improves axial resolution?

A. Shorter wavelength
B. Increased aperture size
C. Wider beam
D. Greater depth of field

Answer: A

Explanation:
Axial resolution refers to the ability of an ultrasound system to distinguish between two structures that are close to each other along the path of the ultrasound beam. It is primarily determined by the spatial pulse length, which is the product of the wavelength and the number of cycles in a pulse. Shorter wavelengths result in shorter spatial pulse lengths, thereby improving axial resolution. This is because shorter wavelengths (which correspond to higher frequencies) allow for better differentiation between closely spaced structures along the beam's axis.
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

NEW QUESTION # 60
During a color Doppler scan, which angle to flow would most likely result in no color being visualized?

A. 45 degreesC 88 degrees
B. 175 degrees
C. 3 degrees

Answer: B

Explanation:
* Color Doppler imaging is most effective when the angle between the ultrasound beam and the flow of blood is small.
* At an angle of 88 degrees, the flow of blood is nearly perpendicular to the ultrasound beam.
* When the angle is close to 90 degrees, the Doppler shift (frequency change) approaches zero, resulting in little to no color being visualized on the Doppler image.
* Thus, to obtain a color signal, the angle should be optimized to be as close to 0 degrees as possible, with 60 degrees being the practical limit for accurate Doppler measurements.References:
* ARDMS Sonography Principles and Instrumentation guidelines on Doppler angle and its effect on Doppler imaging.

NEW QUESTION # 61
Which resolution capability is most affected by spatial pulse length?

A. Elevational
B. Temporal
C. Axial
D. Lateral

Answer: C

Explanation:
* Axial resolution refers to the ability to distinguish two structures that are close to each other along the path of the ultrasound beam.
* Spatial pulse length (SPL) is the distance over which one pulse occurs, and it directly affects axial resolution.
* Shorter SPL improves axial resolution because it allows better differentiation of closely spaced structures.
* The axial resolution is improved by increasing the frequency of the transducer, which shortens the wavelength and hence the SPL.References:
* ARDMS Sonography Principles and Instrumentation guidelines on resolution parameters and their impact on image quality.

NEW QUESTION # 62
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