OVERVIEW OF ULTRASOUND TECHNOLOGY AND

PDF Download

OVERVIEW OF ULTRASOUND TECHNOLOGY AND

TECHNIQUES EXAM QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -59 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Ultrasound Generators

Answer:

Devices developed in the 1950s for ultrasound production.

Question 2: Ultrasound Pulse

Answer:

Ultrasound wave bursts; typically 2-10 MHz.

Question 3: Audible Sound

Answer:

Sound frequencies between 16 Hz to 20,000 Hz.

Question 4: B-Mode

Answer:

Creates two-dimensional images from reflected echoes.

Question 5: Impedance Matching Layer

Answer:

Enhances transmission of ultrasound into the body.

Question 6: Acoustic Enhancement

Answer:

Increased echoes behind weakly attenuating structures.

Question 7: Piezoelectric Crystals

Answer:

Materials that generate ultrasound waves from electrical signals.

Question 8: Temporal Resolution

Answer:

Ability to display events over time.

Question 9: Refraction

Answer:

Bending of ultrasound waves at interfaces.

Question 10: Velocity

Answer:

Speed of sound; frequency times wavelength.

Question 11: Acoustic Lens

Answer:

Focuses ultrasound beam to improve resolution.

Question 12: Backing/Damping Material

Answer:

Reduces pulse length and eliminates vibrations.

Question 13: Wide Bandwidth

Answer:

Transducer with a range of frequencies.

Question 14: Beam Width

Answer:

Dimension of the ultrasound beam.

Question 15: Narrow Bandwidth

Answer:

Transducer with limited frequency range.

Question 16: Doppler Effect

Answer:

Frequency change due to relative motion between source and observer.

Question 17: Spatial Resolution

Answer:

Ability to distinguish small structures.

Question 18: Lateral Resolution

Answer:

Resolution perpendicular to the beam.

Question 19: Colour Doppler

Answer:

Visualizes flow velocities using color coding.

Question 20: Acoustic Impedance

Answer:

Resistance of a substance to sound wave propagation.

Question 21: Scattering

Answer:

Ultrasound waves deflected by small structures.

Question 22: Edge Shadowing

Answer:

Shadowing at the edges of structures.

Question 23: Grating Lobes

Answer:

Artifacts caused by transducer design.

Question 24: Far Field

Answer:

Region further from the transducer.

Question 25: Reflection

Answer:

Echoes returning from tissue interfaces.

Question 26: Mirror Image Artifact

Answer:

False echoes due to reflection at interfaces.

Question 27: Equipment-Generated Artifact

Answer:

Errors from incorrect equipment use.

Question 28: Real-Time Imaging

Answer:

Displays movement as it occurs using ultrasound.

Question 29: Transducer

Answer:

Device converting electrical energy to ultrasound waves.