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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	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 (Q106-Q111):

NEW QUESTION # 106
If the speed of sound in a medium is less than the average speed of sound in soft tissue, where will the echo be placed on an image?

A. Laterally
B. Too shallow
C. Not visualized
D. Too deep

Answer: D

Explanation:
The placement of an echo on an ultrasound image is dependent on the assumption that the speed of sound in soft tissue is 1540 m/s. If the speed of sound in the medium is less than this assumed speed, the ultrasound system will interpret the returning echo as taking longer to return than it actually does. This causes the system to place the echo deeper in the image than its actual position. Therefore, the echo will be displayed "too deep" in the image.
References:
ARDMS Sonography Principles & Instrumentation Guidelines
Kremkau FW. Sonography Principles and Instruments. 9th ed. Philadelphia, PA: Elsevier; 2016.

NEW QUESTION # 107
Which technique averages individual frames together to improve the image?

A. Persistence
B. Coded excitation
C. Harmonic imaging
D. Compression

Answer: A

Explanation:
Persistence is a technique used in ultrasound imaging that averages individual frames together to improve the overall image quality. This process helps to reduce noise and improve the signal-to-noise ratio, leading to clearer and more stable images. By averaging multiple frames, transient artifacts are minimized, and the continuity of structures is better visualized. Persistence is particularly useful in imaging static or slow-moving structures. Reference:
ARDMS Sonography Principles and Instrumentation guidelines
"Ultrasound Physics and Technology: How, Why and When" by M. Evans, C. Archer, and K. Weston

NEW QUESTION # 108
What is a potential negative consequence of using a high wall filter?

A. Too much noise may appear on the image
B. Desired signal may be eliminated
C. Penetration is reduced
D. Aliasing could occur

Answer: B

Explanation:
A high wall filter is used in Doppler ultrasound to eliminate low-frequency signals that may be attributed to vessel wall motion or other low-velocity flows. However, if the wall filter is set too high, it can inadvertently eliminate desired low-frequency Doppler signals that represent real blood flow, particularly in smaller vessels or those with slower flow velocities. This results in a loss of valuable diagnostic information.
References:ARDMS Sonography Principles and Instrumentation (SPI) Review, Doppler Ultrasound section.

NEW QUESTION # 109
Which parameters determine the propagation speed of sound in a medium?

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

Answer: D

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=#E, where#vis the propagation speed,#Eis the elasticity (or modulus of elasticity), and##is the density.
References
* ARDMS Sonography Principles and Instrumentation (SPI) Exam Study Guide
* "Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau

NEW QUESTION # 110
Which unfocused transducer will have the greatest divergence?

A. 6 mm aperture, 4 MHz
B. 4 mm aperture, 4 MHz
C. 6 mm aperture, 6 MHz
D. 4 mm aperture, 6 MHz

Answer: B

Explanation:
Transducer beam divergence is influenced by the aperture size and frequency. A smaller aperture and lower frequency result in greater beam divergence. Among the given options, the transducer with a 4 mm aperture and 4 MHz frequency will have the greatest divergence. This is because the smaller aperture size contributes to a wider beam spread, and the lower frequency also increases the divergence compared to higher frequencies.
Reference:
ARDMS Sonography Principles and Instrumentation guidelines
Kremkau, F. W. (2015). Diagnostic Ultrasound: Principles and Instruments. Elsevier.

NEW QUESTION # 111
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