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ARDMS SPI Exam Syllabus Topics:

Topic
Details

Topic 1

• 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.

Topic 2

• 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 3

• Manage Ultrasound Transducers: It delves into 2D array transducer concepts, 3D
• 4D transducer concepts, and nonimaging transducer concepts.

Topic 4

• 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 5

• 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.

 

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q111-Q116):

NEW QUESTION # 111
Which color control was adjusted in color bar A to produce color bar B?

• A. Invert
• B. Scale
• C. Map
• D. Baseline

Answer: B

Explanation:
The color bar on a Doppler ultrasound display indicates the range of velocities that the system can detect and display. In color bar A, the scale is set to a higher maximum velocity (64 cm/s), while in color bar B, the scale is set to a lower maximum velocity (16 cm/s). Adjusting the scale (or velocity range) changes the upper and lower limits of the velocities displayed, which affects the sensitivity of the Doppler system to detect flow velocities. Lowering the scale allows for better visualization of lower velocities, but it may also increase the likelihood of aliasing for higher velocities.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

 

NEW QUESTION # 112
Which type of display process rescans only the region of interest and improves resolution?

• A. Write magnification
• B. Spatial compounding
• C. Read magnification
• D. Frequency compounding

Answer: A

Explanation:
Write magnification, or pre-processing zoom, involves rescanning the region of interest (ROI) with more scan lines, thus acquiring new data for that specific area. This process increases the spatial resolution of the image in the magnified area because it gathers more detailed data by adjusting the scan parameters, resulting in improved image quality. This is different from read magnification (post-processing zoom), which simply enlarges the existing image data without increasing resolution.
References:
ARDMS Sonography Principles & Instrumentation Guidelines
Hedrick WR, Hykes DL, Starchman DE.Ultrasound Physics and Instrumentation. 4th ed. Philadelphia, PA:
Elsevier Saunders; 2005.

 

NEW QUESTION # 113
What is true regarding the display for color Doppler?

• A. A positive shift is always above the baseline
• B. A negative shift always requires using a lower wall filter
• C. A negative shift is always venous flow
• D. A positive shift is always red

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In color Doppler, frequency shifts can be displayed either above or below the baseline in spectral Doppler. In spectral Doppler, a positive shift is displayed above the baseline by default (unless inverted). In color Doppler, red/blue assignments depend on color map orientation.
Principles and Instrumentation state:
"A positive Doppler shift (flow toward the transducer) is displayed above the baseline in spectral Doppler."
* Red color (B) does not always correspond to positive shift; it depends on color map.
* Negative shift (C) does not always indicate venous flow.
* Wall filter settings (D) affect low-velocity signals, not shift direction.
Therefore, the correct answer is A: A positive shift is always above the baseline.
-

 

NEW QUESTION # 114
Which control determines the amount of amplification occurring in the receiver?

• A. Overall gain
• B. Output power
• C. Persistence
• D. Dynamic range

Answer: A

Explanation:
Overall gain controls the amplification of all the received ultrasound signals uniformly. This adjustment affects the brightness of the entire image by increasing or decreasing the amplification of the echoes returning from all depths. It is a primary control for adjusting image brightness. The overall gain should be set to an appropriate level to ensure that the ultrasound image is neither too bright (over-gained) nor too dark (under-gained), allowing for optimal visualization of the anatomical structures.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.

 

NEW QUESTION # 115
Which of these modes has the highest duty factor?

• A. Pulsed wave Doppler
• B. Gray-scale
• C. Continuous wave Doppler
• D. Color flow Doppler

Answer: C

Explanation:
The duty factor is the fraction of time that the ultrasound system is actively transmitting a signal. Continuous wave (CW) Doppler has the highest duty factor because it continuously transmits and receives ultrasound waves. Unlike pulsed wave Doppler, which alternates between sending and receiving signals, CW Doppler does not have a listening period, resulting in a duty factor of nearly 100%. Therefore, CW Doppler has the highest duty factor among the modes listed.
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 # 116
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