Free Sonography Principles & Instrumentation Questions and Answers

Question 1

Which phantom from the list below does sonographic quality assurance?

Accepted Answer

Tissue equivalent phantom

Answer

Tissue equivalent phantoms are specifically designed to mimic the acoustic properties of human tissue, such such as speed of sound, attenuation, and scattering. This allows for comprehensive evaluation of an ultrasound system's performance, including axial and lateral resolution, penetration, and image uniformity. Therefore, they are essential tools for sonographic quality assurance programs.

Question 2

The speed of sound for tissue comparable phantoms should be equal to:

Accepted Answer

1,540 m/s

Answer

The average speed of sound in soft human tissue is approximately 1,540 meters per second (or 1.54 mm/µs). For phantoms to accurately simulate human tissue and allow for proper calibration and quality assurance of ultrasound equipment, their speed of sound must match this value. This ensures that the ultrasound system's distance measurements and image reconstruction are accurate.

Question 3

Which of the following is an ergonomic device built into sonographic equipment for the sonographer's musculoskeletal safety?

Accepted Answer

Monitor articulation

Answer

Monitor articulation allows sonographers to adjust the display screen's height, tilt, and swivel to their individual needs and scanning position. This ergonomic feature helps reduce neck, back, and eye strain by promoting a neutral posture during examinations. By minimizing physical discomfort and awkward positions, it directly contributes to musculoskeletal safety and helps prevent work-related injuries.

Question 4

A pulsed sound wave is best described by the following acoustic parameter:

Accepted Answer

Duty factor

Answer

The duty factor is the fraction of time that the pulsed ultrasound system is actively transmitting sound. It is a dimensionless number representing the ratio of pulse duration to the pulse repetition period. Since a pulsed wave involves intermittent periods of transmission and listening, the duty factor is a key acoustic parameter that specifically characterizes its intermittent nature.

Question 5

The maximum sound speed is found in:

Accepted Answer

Bone

Answer

The speed of sound is highest in denser and stiffer media. Among the options provided, bone is the densest and stiffest tissue in the human body. This allows sound waves to propagate through it much faster than through softer tissues like liver, blood, or fat, where the speed of sound is significantly lower.

ARDMS SPI - ARDMS Sonography Principles and Instrumentation Practice Test

ARDMS SPI - ARDMS Sonography Principles and Instrumentation Practice Test

Free Sonography Principles & Instrumentation Questions and Answers