Reliable SPI Exam Dumps & Leading Offer in Qualification Exams & ARDMS Sonography Principles and Instrumentation

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The Exam4Labs is a trusted and leading platform that is committed to making the entire ARDMS SPI exam preparation process simple, smart, and quick. To achieve this objective Exam4Labs is offering real, valid, and updated ARDMS SPI Exam Questions. These ARDMS SPI exam dumps are the real SPI exam questions that surely will repeat in the upcoming SPI exam and you can pass the challenging exam.

ARDMS SPI Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	Manage Ultrasound Transducers: It delves into 2D array transducer concepts, 3D 4D transducer concepts, and nonimaging transducer concepts.
Topic 3	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 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	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.

ARDMS Sonography Principles and Instrumentation Sample Questions (Q127-Q132):

NEW QUESTION # 127
Which factor does a string phantom evaluate?

A. Intensity values
B. Slice thickness
C. Flow velocity
D. Two-dimensional resolution

Answer: C

Explanation:
A string phantom is designed to evaluate the accuracy of Doppler ultrasound systems, specifically in measuring flow velocity. It consists of a moving string or filament that mimics blood flow within a vessel. By using this phantom, sonographers can assess how accurately the ultrasound system can detect and measure the speed of the moving target. This helps in calibrating and verifying the performance of Doppler systems, ensuring they provide accurate flow velocity readings in clinical practice.
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 # 128
Which change should be made to lower the mechanical index (MI)?

A. Decreasing output power
B. Lowering transducer frequency
C. Increasing gain
D. Activating tissue harmonics

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Mechanical Index (MI) is proportional to the peak negative pressure and inversely proportional to the square root of frequency. Lowering output power directly decreases the peak pressure, thus reducing MI.
Principles and Instrumentation state:
"Mechanical index decreases with lower output power, reducing the risk of mechanical bioeffects such as cavitation."
* Lowering frequency (A) increases MI.
* Tissue harmonics (B) improves image quality but does not reduce MI directly.
* Increasing gain (D) affects displayed brightness, not acoustic power.
Therefore, the correct answer is C: Decreasing output power.
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NEW QUESTION # 129
According to Poiseuille's law, a change in which parameter would have the greatest influence on blood flow?

A. Length of vessel
B. Pressure gradient
C. Vessel radius
D. Viscosity of the fluid

Answer: C

Explanation:
According to Poiseuille's law, the flow rate of a fluid through a vessel is directly proportional to the fourth power of the vessel's radius. Therefore, a small change in the radius of the vessel has a much larger effect on blood flow compared to changes in pressure gradient, length of the vessel, or viscosity of the fluid.
Reference:
ARDMS Sonography Principles and Instrumentation guidelines
Poiseuille's law in medical physics and hemodynamics literature.

NEW QUESTION # 130
Which type of display process rescans only the region of interest and improves resolution?

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

Answer: C

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.
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 # 131
Which direction is blood flowing in this image?
A close-up of a ultrasound Description automatically generated

A. Right to left
B. Left to right
C. Indeterminate
D. Bidirectional

Answer: B

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In the color Doppler image, the color bar indicates that red represents flow toward the transducer and blue represents flow away from the transducer. The vessel displays red flow on the left side and blue on the right side, indicating flow direction from left to right across the image.
According to sonography instrumentation reference:
"Color Doppler maps flow direction according to the color scale. Flow toward the transducer is coded as red, and away is coded as blue." Therefore, the correct answer is B: Left to right.
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All answers are fully verified, 100% accurate, and aligned with Sonography Principles and Instrumentation documentation.
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NEW QUESTION # 132
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RELIABLE SPI EXAM DUMPS & LEADING OFFER IN QUALIFICATION EXAMS & ARDMS SONOGRAPHY PRINCIPLES AND INSTRUMENTATION

Reliable SPI Exam Dumps & Leading Offer in Qualification Exams & ARDMS Sonography Principles and Instrumentation