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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

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 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

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

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q186-Q191):

NEW QUESTION # 186
Which statement describes the purpose of using a spectral Doppler wall filter?

A. To widen the area in which the Doppler shift is sampled
B. To eliminate the lower velocity signals
C. To clean up the audio signals
D. To eliminate the higher velocity signals

Answer: B

Explanation:
The purpose of using a spectral Doppler wall filter is to eliminate lower velocity signals. Wall filters are designed to remove low-frequency Doppler shifts caused by the motion of the vessel walls or surrounding tissues, which are generally of no diagnostic value. By eliminating these lower velocity signals, the wall filter helps to clean up the Doppler signal and reduce clutter, allowing for a clearer and more accurate display of blood flow velocities.
References
* ARDMS Sonography Principles and Instrumentation (SPI) Exam Study Guide
* "Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau

NEW QUESTION # 187
Which parameters determine the propagation speed of sound in a medium?

A. Amplitude and impedance
B. Elasticity and density
C. Intensity and density
D. Frequency and impedance

Answer: B

Explanation:
The propagation speed of sound in a medium is determined by the medium's elasticity and density. Elasticity refers to the ability of the medium to return to its original shape after deformation, while density is the mass per unit volume of the medium. The speed of sound increases with higher elasticity and decreases with higher density. This relationship is described by the equation=v=PE, where v is the propagation speed, E is the elasticity (or modulus of elasticity), and p is the density.
Reference:
ARDMS Sonography Principles and Instrumentation (SPI) Exam Study Guide
"Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau

NEW QUESTION # 188
How is an ultrasound image affected if several adjacent crystals of a linear array transducer are damaged?

A. Erratic beam steering and focusing
B. Horizontal zone of dropout
C. Vertical dark zone directly below the damaged elements
D. Loss of entire image

Answer: C

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In linear array transducers, each element controls a vertical portion of the image. If adjacent elements fail, the result is a vertical dropout corresponding directly below the damaged crystals.
According to sonography instrumentation reference:
"Damage to specific elements in a linear array transducer results in vertical dropout directly beneath the malfunctioning crystals." Therefore, the correct answer is A: Vertical dark zone directly below the damaged elements.
-

NEW QUESTION # 189
What is ensemble length (packet size)?

A. Amplitude of pulses along the scan line
B. Velocity of pulses along the scan line
C. Length of pulses per scan line
D. Number of pulses along a scan line

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Ensemble length, also known as packet size, refers to the number of ultrasound pulses sent along each scan line when performing color Doppler or power Doppler imaging. Increasing the ensemble length allows for more accurate velocity estimation and improved sensitivity to low flow but comes at the expense of decreased frame rate.
Official sonography instrumentation reference states:
"Ensemble length refers to the number of pulses per scan line used in color Doppler imaging. A larger ensemble improves sensitivity to slow flow and provides more accurate frequency (velocity) estimates but reduces temporal resolution." Thus, the correct answer is B: Number of pulses along a scan line.
-

NEW QUESTION # 190
The calipers in this image measure which performance characteristic of a system?

A. Lateral resolution
B. Axial resolution
C. Dynamic range
D. Depth measurement accuracy

Answer: D

Explanation:
The calipers shown in the image are used to measure the depth of structures within the ultrasound image. This performance characteristic, known as depth measurement accuracy, assesses how accurately the ultrasound system can measure the distance from the transducer to a specific point within the body. Accurate depth measurements are crucial for diagnostic purposes, ensuring that anatomical and pathological structures are correctly identified and evaluated.
Reference:
American Registry for Diagnostic Medical Sonography (ARDMS) Sonography Principles and Instrumentation study materials.
Textbook of Diagnostic Sonography by Hagen-Ansert, S. L. (latest edition).

NEW QUESTION # 191
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