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Biomedical Optics and Laser Applications

Description: This quiz covers the fundamentals of Biomedical Optics and Laser Applications, including laser-tissue interactions, optical imaging techniques, and therapeutic applications of lasers.
Number of Questions: 15
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Tags: biomedical optics laser applications laser-tissue interactions optical imaging laser therapy
Attempted 0/15 Correct 0 Score 0

Which laser wavelength is commonly used for laser skin resurfacing?

  1. 1064 nm

  2. 532 nm

  3. 800 nm

  4. 1550 nm


Correct Option: A
Explanation:

1064 nm wavelength is commonly used for laser skin resurfacing due to its deep penetration and minimal absorption by melanin, making it suitable for treating a variety of skin conditions.

What is the primary mechanism of laser-tissue interaction in laser ablation?

  1. Photocoagulation

  2. Photodisruption

  3. Photovaporization

  4. Photoionization


Correct Option: C
Explanation:

Photovaporization is the primary mechanism of laser-tissue interaction in laser ablation, where the laser energy is absorbed by the tissue, causing rapid vaporization and tissue removal.

Which optical imaging technique utilizes near-infrared light to visualize blood vessels?

  1. Optical Coherence Tomography (OCT)

  2. Confocal Microscopy

  3. Fluorescence Microscopy

  4. Angiography


Correct Option: D
Explanation:

Angiography is an optical imaging technique that uses near-infrared light to visualize blood vessels by injecting a contrast agent into the bloodstream.

What is the principle behind laser-induced fluorescence spectroscopy?

  1. Absorption of laser light by molecules

  2. Emission of laser light by molecules

  3. Scattering of laser light by molecules

  4. Reflection of laser light by molecules


Correct Option: B
Explanation:

Laser-induced fluorescence spectroscopy relies on the emission of laser light by molecules when they return to their ground state after absorbing laser energy.

Which laser type is commonly used in laser lithotripsy for kidney stone removal?

  1. Nd:YAG laser

  2. CO2 laser

  3. Excimer laser

  4. Argon laser


Correct Option: A
Explanation:

Nd:YAG laser is commonly used in laser lithotripsy due to its ability to generate high-energy pulses that can fragment kidney stones without damaging surrounding tissue.

What is the primary mechanism of laser-induced tissue welding?

  1. Coagulation

  2. Vaporization

  3. Melting

  4. Ablation


Correct Option: C
Explanation:

Laser-induced tissue welding involves melting the edges of the tissue to be joined, allowing them to fuse together upon cooling.

Which laser wavelength is commonly used for laser hair removal?

  1. 755 nm

  2. 1064 nm

  3. 532 nm

  4. 800 nm


Correct Option: D
Explanation:

800 nm wavelength is commonly used for laser hair removal due to its ability to target melanin in hair follicles while minimizing damage to surrounding skin.

What is the term for the process of using lasers to seal blood vessels during surgery?

  1. Laser coagulation

  2. Laser welding

  3. Laser ablation

  4. Laser vaporization


Correct Option: A
Explanation:

Laser coagulation involves using lasers to heat and seal blood vessels, preventing bleeding during surgery.

Which laser type is commonly used in laser eye surgery?

  1. Excimer laser

  2. Nd:YAG laser

  3. CO2 laser

  4. Argon laser


Correct Option: A
Explanation:

Excimer lasers are commonly used in laser eye surgery due to their ability to precisely ablate corneal tissue, reshaping it to correct vision problems.

What is the principle behind laser-induced interstitial thermal therapy (LITT)?

  1. Heating tissue using laser energy

  2. Cooling tissue using laser energy

  3. Ablating tissue using laser energy

  4. Vaporizing tissue using laser energy


Correct Option: A
Explanation:

LITT involves using laser energy to heat tissue interstitially, causing cell death and tissue ablation.

Which laser type is commonly used in laser dentistry?

  1. CO2 laser

  2. Nd:YAG laser

  3. Er:YAG laser

  4. Excimer laser


Correct Option: C
Explanation:

Er:YAG lasers are commonly used in laser dentistry due to their ability to precisely ablate dental tissue and their minimal thermal damage to surrounding tissues.

What is the primary mechanism of laser-induced tissue coagulation?

  1. Vaporization

  2. Melting

  3. Photocoagulation

  4. Ablation


Correct Option: C
Explanation:

Laser-induced tissue coagulation involves the use of lasers to heat and denature tissue proteins, causing coagulation and tissue destruction.

Which laser wavelength is commonly used for laser prostate surgery?

  1. 532 nm

  2. 800 nm

  3. 1064 nm

  4. 1550 nm


Correct Option: C
Explanation:

1064 nm wavelength is commonly used for laser prostate surgery due to its ability to penetrate tissue deeply and its minimal absorption by blood, allowing for precise tissue ablation.

What is the term for the process of using lasers to remove tattoos?

  1. Laser tattoo removal

  2. Laser skin resurfacing

  3. Laser hair removal

  4. Laser lithotripsy


Correct Option: A
Explanation:

Laser tattoo removal involves using lasers to break down tattoo pigments into smaller particles that can be removed by the body's immune system.

Which laser type is commonly used in laser cancer therapy?

  1. Nd:YAG laser

  2. CO2 laser

  3. Argon laser

  4. Dye laser


Correct Option: D
Explanation:

Dye lasers are commonly used in laser cancer therapy due to their ability to generate tunable wavelengths that can target specific chromophores in cancer cells.

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