SPI New Real Test & Trustworthy SPI Dumps

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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	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 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	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 5	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.

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ARDMS Sonography Principles and Instrumentation Sample Questions (Q21-Q26):

NEW QUESTION # 21
What is the relationship between overall gain and image brightness?

A. The higher the overall gain, the brighter the image
B. There is no relationship between overall gain and image brightness
C. The lower the overall gain, the brighter the image
D. The higher the overall gain, the darker the image

Answer: A

Explanation:
Overall gain in ultrasound refers to the amplification of all the received echo signals. Increasing the overall gain amplifies the signals, making the entire image brighter. Conversely, decreasing the overall gain reduces the signal amplification, resulting in a darker image. Overall gain adjustment affects the entire image uniformly, unlike time gain compensation (TGC), which adjusts the gain at different depths independently.
Reference:
ARDMS Sonography Principles and Instrumentation (SPI) Exam Study Guide
"Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau

NEW QUESTION # 22
If the pulse repetition frequency is 3 kHz, what is the maximum Doppler shift that can be detected without aliasing?

A. 1.5 kHz
B. 9.0 kHz
C. 3.0 kHz
D. 6.0 kHz

Answer: A

Explanation:
The maximum Doppler shift that can be detected without aliasing is determined by the Nyquist limit, which is half of the pulse repetition frequency (PRF). If the PRF is 3 kHz, the Nyquist limit is 32=1.523kHzz=1.5kHz. Therefore, the maximum Doppler shift that can be detected without aliasing is 1.5 kHz. Aliasing occurs when the Doppler shift exceeds this limit, causing an incorrect representation of the velocity.
Reference: ARDMS Sonography Principles and Instrumentation, Chapter on Doppler Principles.

NEW QUESTION # 23
What is a potential negative consequence of using a high wall filter?

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

Answer: A

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.
Reference: ARDMS Sonography Principles and Instrumentation (SPI) Review, Doppler Ultrasound section.

NEW QUESTION # 24
Which parameters determine the propagation speed of sound in a medium?

A. Intensity and density
B. Amplitude and impedance
C. Frequency and impedance
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=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 # 25
Which feature is a characteristic of continuous wave Doppler?

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

Answer: B

Explanation:
Continuous wave Doppler uses two crystals - one for transmitting and one for receiving ultrasound waves continuously. This allows for the measurement of high velocities without aliasing, a common limitation in pulsed wave Doppler. However, continuous wave Doppler does not have range specificity, meaning it cannot precisely determine the depth from which the Doppler signal is returning.
Reference: ARDMS Sonography Principles and Instrumentation, Chapter on Doppler Ultrasound.

NEW QUESTION # 26
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SPI NEW REAL TEST & TRUSTWORTHY SPI DUMPS

SPI New Real Test & Trustworthy SPI Dumps