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Well-Prepared Clearer SPI Explanation–Fantastic Valid Exam Dumps for SPI: Sonography Principles and Instrumentation
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ARDMS SPI Exam Syllabus Topics:
Topic
Details
Topic 1
- 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 2
- 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 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
- Manage Ultrasound Transducers: It delves into 2D array transducer concepts, 3D
- 4D transducer concepts, and nonimaging transducer 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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Fast, Hands-On SPI Exam-Preparation Questions
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ARDMS Sonography Principles and Instrumentation Sample Questions (Q10-Q15):
NEW QUESTION # 10
Which target group in this image of a tissue-mimicking phantom is used to evaluate axial resolution?
- A. Option B
- B. Option D
- C. Option A
- D. Option C
Answer: A
Explanation:
In the given image of a tissue-mimicking phantom, Option B (yellow box) is used to evaluate axial resolution. Axial resolution refers to the ability of the ultrasound system to distinguish between two structures that are close to each other along the path of the ultrasound beam (i.e., parallel to the beam). The targets in Option B are typically aligned in such a way to test the system's capacity to differentiate between structures that are situated closely together along the beam's axis. Reference:
ARDMS Sonography Principles and Instrumentation guidelines
"Sonography: Principles and Instruments" by Joan P. Baker and Marveen Craig
NEW QUESTION # 11
Which statement characterizes the primary difference between image A and image B?
A close-up of a medical scan Description automatically generated
- A. Image A demonstrates a wider scale of contrast.
- B. Image A demonstrates a shallower field of view.
- C. Image A demonstrates a lower overall gain setting.
- D. Image A demonstrates a better axial resolution.
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In image A, the structures appear darker with less overall brightness compared to image B. This indicates that the overall gain (receiver amplification) is set lower in image A, resulting in a dimmer image. Gain controls how much the returning echoes are amplified after detection.
According to Principles and Instrumentation:
"Overall gain amplifies all returning echoes equally. A lower gain setting results in a darker image, while higher gain brightens the display."
* Axial resolution (A) is primarily dependent on frequency and pulse length, not visible here.
* Field of view (C) appears similar between both images.
* Contrast scale (D) refers to dynamic range, not directly indicated here.
Therefore, the correct answer is B: Image A demonstrates a lower overall gain setting.
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NEW QUESTION # 12
Which of these modes has the highest duty factor?
- A. Continuous wave Doppler
- B. Gray-scale
- C. Color flow Doppler
- D. Pulsed wave Doppler
Answer: A
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.
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 # 13
Which outcome is an advantage of more pulses in an ensemble length?
- A. Reduced ghosting artifact
- B. Increased accuracy of velocity measurement
- C. Increased line density
- D. Improved temporal resolution
Answer: B
Explanation:
Ensemble length, also known as packet size or Doppler packet, refers to the number of pulses used to calculate each Doppler measurement. Increasing the number of pulses in an ensemble length improves the accuracy of velocity measurements by providing more data points for the Doppler shift analysis. This leads to better estimation of mean velocities and reduces the variability of the measurements, although it may slightly decrease temporal resolution due to the longer time required to acquire the data.
ARDMS Sonography Principles and Instrumentation guidelines
Edelman, S. K. (2017). Understanding Ultrasound Physics.
NEW QUESTION # 14
What happens to the Doppler shift when the angle is changed from 30 to 60 degrees?
- A. Decreases
- B. Increases
- C. Loss of Doppler signal
- D. No significant change
Answer: A
Explanation:
The Doppler shift is directly related to the cosine of the angle between the ultrasound beam and the direction of blood flow. As the angle increases from 30 degrees to 60 degrees, the cosine of the angle decreases (cosine of 30 degrees is approximately 0.87, while cosine of 60 degrees is 0.5). Since the Doppler shift is proportional to the cosine of the angle, increasing the angle results in a decreased Doppler shift. This means the measured blood flow velocities will appear lower at a 60-degree angle compared to a 30-degree angle.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS). Sonography Principles and Instrumentation (SPI) Examination Review Guide.
NEW QUESTION # 15
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