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Biomedical Ultrasound and Acoustic Imaging

Description: This quiz covers the fundamentals of Biomedical Ultrasound and Acoustic Imaging, including principles, techniques, and applications.
Number of Questions: 15
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Tags: ultrasound acoustic imaging medical imaging biomedical engineering
Attempted 0/15 Correct 0 Score 0

What is the primary mechanism of image formation in ultrasound imaging?

  1. X-ray absorption

  2. Magnetic resonance

  3. Sound wave reflection

  4. Radioactive decay


Correct Option: C
Explanation:

Ultrasound imaging utilizes the reflection of sound waves from different tissues to create images. The reflected waves provide information about the tissue's density and structure.

Which type of ultrasound wave is commonly used in medical imaging?

  1. Continuous wave

  2. Pulsed wave

  3. Doppler wave

  4. Ultrasonic wave


Correct Option: B
Explanation:

Pulsed wave ultrasound is commonly used in medical imaging because it allows for the measurement of blood flow velocity and tissue motion.

What is the term for the rate at which ultrasound waves oscillate?

  1. Frequency

  2. Amplitude

  3. Wavelength

  4. Velocity


Correct Option: A
Explanation:

Frequency refers to the number of oscillations per second of an ultrasound wave. It is measured in Hertz (Hz).

Which property of ultrasound waves determines the depth of penetration into tissue?

  1. Frequency

  2. Amplitude

  3. Wavelength

  4. Velocity


Correct Option: A
Explanation:

Higher frequency ultrasound waves have shorter wavelengths and experience greater attenuation in tissue, resulting in shallower penetration. Lower frequency waves have longer wavelengths and penetrate deeper.

What is the term for the scattering of ultrasound waves by small particles in tissue?

  1. Refraction

  2. Diffraction

  3. Rayleigh scattering

  4. Mie scattering


Correct Option: C
Explanation:

Rayleigh scattering occurs when ultrasound waves interact with particles that are much smaller than the wavelength of the wave. This scattering contributes to the formation of ultrasound images.

Which imaging mode in ultrasound utilizes the Doppler effect to measure blood flow velocity?

  1. B-mode

  2. M-mode

  3. Doppler mode

  4. Color Doppler mode


Correct Option: C
Explanation:

Doppler mode uses the Doppler effect to measure the velocity of moving objects, such as blood flow. It is commonly used in ultrasound imaging to assess blood flow patterns.

What is the term for the formation of three-dimensional ultrasound images?

  1. 3D ultrasound

  2. 4D ultrasound

  3. Real-time ultrasound

  4. Transducer ultrasound


Correct Option: A
Explanation:

3D ultrasound involves the acquisition and processing of multiple two-dimensional ultrasound images to create a three-dimensional representation of the anatomy.

Which type of ultrasound transducer is commonly used for abdominal imaging?

  1. Linear array transducer

  2. Curved array transducer

  3. Phased array transducer

  4. Sector array transducer


Correct Option: B
Explanation:

Curved array transducers are often used for abdominal imaging due to their ability to provide a wider field of view and better image quality.

What is the term for the use of ultrasound waves to generate heat in tissue for therapeutic purposes?

  1. Ultrasound therapy

  2. High-intensity focused ultrasound (HIFU)

  3. Ultrasound ablation

  4. Ultrasound lithotripsy


Correct Option: B
Explanation:

High-intensity focused ultrasound (HIFU) involves the use of high-energy ultrasound waves to generate heat and destroy targeted tissue.

Which imaging modality combines ultrasound and magnetic resonance imaging (MRI) to provide complementary information?

  1. Ultrasound-guided MRI

  2. Magnetic resonance ultrasound imaging (MRUI)

  3. Ultrasound-enhanced MRI

  4. MRI-guided ultrasound


Correct Option: A
Explanation:

Ultrasound-guided MRI involves the use of ultrasound images to guide the acquisition of MRI scans, allowing for more precise targeting and improved image quality.

What is the term for the use of ultrasound waves to break up kidney stones?

  1. Ultrasound therapy

  2. High-intensity focused ultrasound (HIFU)

  3. Ultrasound ablation

  4. Ultrasound lithotripsy


Correct Option: D
Explanation:

Ultrasound lithotripsy involves the use of ultrasound waves to break down kidney stones into smaller fragments that can be passed more easily.

Which imaging mode in ultrasound displays a cross-sectional view of the body?

  1. B-mode

  2. M-mode

  3. Doppler mode

  4. Color Doppler mode


Correct Option: A
Explanation:

B-mode ultrasound is the most common imaging mode and provides a two-dimensional cross-sectional view of the body.

What is the term for the use of ultrasound waves to visualize blood flow patterns in real-time?

  1. Ultrasound therapy

  2. High-intensity focused ultrasound (HIFU)

  3. Ultrasound ablation

  4. Color Doppler imaging


Correct Option: D
Explanation:

Color Doppler imaging is a technique that uses color to represent the direction and velocity of blood flow in real-time.

Which imaging mode in ultrasound displays the motion of a structure over time?

  1. B-mode

  2. M-mode

  3. Doppler mode

  4. Color Doppler mode


Correct Option: B
Explanation:

M-mode ultrasound displays the motion of a structure over time, such as the heart valves or a fetal heartbeat.

What is the term for the use of ultrasound waves to guide the insertion of needles or catheters during medical procedures?

  1. Ultrasound therapy

  2. High-intensity focused ultrasound (HIFU)

  3. Ultrasound ablation

  4. Ultrasound-guided intervention


Correct Option: D
Explanation:

Ultrasound-guided intervention involves the use of ultrasound images to guide the insertion of needles or catheters during medical procedures, such as biopsies or injections.

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