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ARDMS SPI Exam Syllabus Topics:

Topic	Details
Topic 1	Manage Ultrasound Transducers: It delves into 2D array transducer concepts, 3D 4D transducer concepts, and nonimaging transducer concepts.
Topic 2	Provide Clinical Safety & Quality Assurance: This topic covers universal infection control protocols, QA check on ultrasound machine, transducer integrity, ultrasound machine integrity, and statistical parameter concepts.
Topic 3	Perform Ultrasound Examinations: This topic discusses patient care, sonographic ergonomic techniques, echogenicity, reverberation, and potential bioeffects. It also discusses beam steering concepts, panoramic imaging, 3D 4D concepts, and contrast imaging concepts.
Topic 4	Optimize Sonographic Images: The topic focuses on optimization of axial resolution concepts, optimization of lateral resolution concepts, optimization of elevational resolution concepts, optimization of temporal resolution concepts, and magnification techniques.
Topic 5	Apply Doppler Concepts: It discusses Doppler wall filter concepts, Doppler sample gate concepts, y color priority over gray scale concepts, and concepts related to color Doppler map. Furthermore, it discusses concepts to eliminate aliasing, continuous wave Doppler concepts, and color Doppler scale concepts.

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q113-Q118):

NEW QUESTION # 113
Which feature is a characteristic of continuous wave Doppler?

A. Range specificity
B. Aliasing
C. Low thermal index
D. Dedicated transmit and receive crystals

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Continuous wave (CW) Doppler utilizes two separate crystals: one constantly transmitting and one constantly receiving. This setup allows CW Doppler to measure very high velocities without aliasing, but at the cost of losing range specificity (no depth resolution).
According to sonography instrumentation reference:
"Continuous wave Doppler uses two separate elements for continuous transmission and reception of sound waves, allowing for detection of very high velocities but without depth specificity." Therefore, the correct answer is D: Dedicated transmit and receive crysta

NEW QUESTION # 114
Which change improves temporal resolution during color flow imaging?

A. Increase field of view
B. Decrease transmit frequency
C. Decrease packet size
D. Increase line density

Answer: C

Explanation:
Temporal resolution is improved by increasing the frame rate. One way to increase the frame rate is by decreasing the packet size (also known as ensemble length) in color Doppler imaging. The packet size refers to the number of pulses used to determine the Doppler shift at each location. A smaller packet size means fewer pulses are required, which allows for quicker data acquisition and thus a higher frame rate. Increasing the field of view, decreasing transmit frequency, and increasing line density would all decrease the frame rate and thus degrade temporal resolution.
References:
American Registry for Diagnostic Medical Sonography (ARDMS) Sonography Principles and Instrumentation guidelines.

NEW QUESTION # 115
Which transducer was most likely used to create this image?

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

Answer: C

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 # 116
Penetration can be improved by decreasing which setting?

A. Output power
B. Gain
C. Sector width
D. Frequency

Answer: D

Explanation:
In ultrasound imaging, penetration refers to the ability of the ultrasound beam to travel deeper into the tissue. Lower frequency transducers produce sound waves with longer wavelengths, which are less attenuated by the tissues and therefore can penetrate deeper into the body. Conversely, higher frequency transducers produce sound waves with shorter wavelengths that provide better resolution but are more quickly attenuated, resulting in less penetration. Therefore, decreasing the frequency of the transducer improves penetration, allowing for better visualization of deeper structures.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

NEW QUESTION # 117
Which artifact causes a simple cyst to appear to contain debris?

A. Slice thickness
B. Range ambiguity
C. Refraction
D. Enhancement

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Slice thickness (elevational resolution artifact) occurs when the ultrasound beam partially includes surrounding tissue above or below the scan plane, falsely appearing as internal echoes within an otherwise anechoic cyst.
Principles and Instrumentation:
"Slice thickness artifact occurs when off-axis echoes are included in the imaging slice, falsely creating internal echoes in cystic structures."
* Refraction (A) causes displacement.
* Enhancement (B) causes posterior brightening.
* Range ambiguity (D) produces incorrect depth placement.
Therefore, the correct answer is C: Slice thickness.
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NEW QUESTION # 118
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