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Answer+Analysis
1. What is the principle of selective photothermal action?
A. The wavelength of light has the same absorption for all skin structures
B. Light of different wavelengths is absorbed to varying degrees by different skin structures
C. Light cannot penetrate the skin
Answer: B Light of different wavelengths is absorbed to varying degrees by different skin structures
Analysis:The core principle of selective photothermal action is that different wavelengths of light are absorbed to varying degrees by different structures in the skin. For example, light with shorter wavelengths is usually absorbed by surface structures such as melanin in the epidermis, while light with longer wavelengths can penetrate deeper tissues such as hemoglobin in blood vessels. This selective absorption allows treatment to target specific skin problems without damaging surrounding tissues.
2. What does thermal relaxation time (TRT) mainly describe?
A. The organization's ability to absorb light energy
B. The speed at which an organization dissipates heat after absorbing light energy
C. Duration of light pulse
D. The wavelength of light
Answer: B The speed at which an organization dissipates heat after absorbing light energy
Reason:Thermal relaxation time (TRT) describes the rate at which a tissue dissipates heat after absorbing light energy. This is an important parameter as it affects the efficiency of laser and IPL treatments. If TRT is longer, the tissue will maintain heat for a longer period of time, which may lead to enhanced therapeutic effects. If TRT is short, heat will quickly dissipate, affecting the effectiveness of treatment.
3. When spectral selectivity is used in IPL technology to treat which skin problems, wavelengths of 500-600 nanometers are usually used?
A. Stains and pigmentation
B. Vascular issues
C. Skin tightening and collagen stimulation
D. Wrinkles and lines
Answer: A Stains and pigmentation
Analysis:In IPL (Intense Pulsed Light) technology, different wavelengths of light have different effects on different skin problems. For issues of pigmentation and pigmentation, IPL equipment typically selects light wavelengths of 500-600 nanometers. This is because the light energy in this wavelength range is well absorbed by pigments in the skin, such as melanin, which can effectively destroy pigment particles in pigmentation. Through this selective absorption, the pigments in the pigmentation will be broken down and gradually eliminated through natural metabolic processes in the body, thereby achieving the effect of fading pigmentation. This selective absorption principle ensures that the surrounding normal skin is not affected during the treatment process.
4. What unit is energy density measured in intense pulsed light (IPL) therapy?
A. Joules per square centimeter (J/cm ²)
B. Watt per square centimeter (W/cm ²)
C. Illuminance per square centimeter (L/cm ²)
D. Temperature per square centimeter (℃/cm ²)
Answer: A Joules per square centimeter (J/cm ²)
Analysis：Energy density in IPL treatment is measured in joules per square centimeter (J/cm ²). This unit represents the amount of light energy applied per unit area. The energy density directly affects the therapeutic effect and safety. In the principle of photothermal action, the light energy of IPL acts on target tissues in the skin (such as pigment particles or blood vessels) through photothermal conversion, triggering photothermal effect. A higher energy density means more light energy, which deepens the penetration and thermal effects of light on target tissues, helping to more effectively crush pigment particles or guide vascular constriction. However, at the same time, excessive energy density may also cause thermal damage to the skin. Therefore, reasonable adjustment of energy density is the balance between achieving effective treatment and avoiding side effects.
5. What does pulse frequency mainly refer to in intense pulsed light (IPL) therapy?
A. The intensity of a single light pulse
B. Interval time of light pulse emission
C. The number of times light pulses are emitted per unit time
D. The duration of each pulse
Answer: C The number of times light pulses are emitted per unit time
Analysis:Pulse frequency refers to the number of times light pulses are emitted per unit time. In IPL treatment, a higher pulse frequency means more light pulses are emitted per second, which helps to cover a larger area of the skin and improve treatment efficiency. However, this also means that the cooling between each light pulse is shortened, which may lead to the accumulation of excessive heat in the photothermal effect in a short period of time, increasing discomfort. On the contrary, low frequencies give the skin more time to cool down, but may reduce treatment efficiency.
6、What does Beam Mode mainly describe in IPL treatment?
A. Intensity of light beam
B. The distribution of light beams
C. The color of the beam of light
D. The wavelength of the light beam
Answer:B. The distribution of light beams
Analysis:In intense pulsed light (IPL) therapy, beam pattern refers to the distribution characteristics of the beam in the treatment area. This can include uniform distribution patterns, point distribution patterns, etc. Uniform distribution mode means that the light beam is evenly distributed throughout the entire treatment area to ensure that the light energy can fully cover the target area. The point distribution pattern concentrates the light beam on a specific small range to treat local problems in a targeted manner. Therefore, the choice of beam mode directly affects the treatment effect and comfort.
7、How does the cooling system help reduce skin thermal damage during IPL treatment?
A. By increasing the energy of the light source
B. By reducing the emission frequency of the light source
C. By lowering the surface temperature of the skin
D. By heating the surface of the skin
Answer: C. By lowering the surface temperature of the skin
Analysis:IPLDuring the process of intense pulsed light therapy, the conversion of light energy generates a large amount of heat, which may lead to thermal damage to the skin. The function of the cooling system is to reduce the temperature of the skin surface and minimize the impact of this heat on the skin. Specifically, the cooling system can be realized in many ways, such as air flow, liquid cooling or cooling gel. These methods help to keep the skin temperature within a safe range, thus reducing the possible side effects of redness, swelling, burning and dryness during the treatment process. Therefore, the cooling system can not only improve the comfort of treatment, but also reduce potential skin damage.
During IPL (intense pulsed light) treatment, the conversion of light energy generates a large amount of heat, which may lead to thermal damage to the skin. The function of the cooling system is to reduce the temperature of the skin surface and minimize the impact of this heat on the skin. Specifically, the cooling system can be realized in many ways, such as air flow, liquid cooling or cooling gel. These methods help to keep the skin temperature within a safe range, thus reducing the possible side effects of redness, swelling, burning and dryness during the treatment process. Therefore, the cooling system can not only improve the comfort of treatment, but also reduce potential skin damage.
8. What is the main role of filter in IPL treatment?
A. Increase the intensity of light
B. Selective filtering of light of specific wavelengths
C. Change the color of light
D. Increase treatment time
Answer:B. Selective filtering of light of specific wavelengths
Analysis:IPL (Intense Pulsed Light) therapy relies on light of different wavelengths acting on different tissues in the skin. The function of a filter is to filter out unwanted wavelengths and only allow specific wavelengths to pass through, thereby achieving the best therapeutic effect. For example, when dealing with pigmentation issues, the filter selectively filters out other wavelengths to ensure that only wavelengths that help to disperse pigments pass through. This selective filtering not only improves the accuracy of treatment, but also reduces the impact on surrounding healthy tissues, making it a key component in ensuring treatment effectiveness and reducing side effects.
9. What is one of the factors affecting the size of the light spot?
A. Light source brightness
B. Skin type
C. Number of treatments
D. Types of drugs
Answer:B. Skin type
Analysis:Science Popularization · Realism | Explanation of Key Terms for Intense Pulsed Light The choice of spot size is closely related to skin type, as different skin types have different absorption and response to light. For example, light colored skin may have stronger absorption of light energy, while dark colored skin requires different spot settings to avoid excessive absorption. The size of the light spot directly affects the distribution of light energy and the therapeutic effect. Doctors need to choose the appropriate size of the light spot based on the patient's skin characteristics to ensure the effectiveness and safety of the treatment. Changes in skin type may require adjustments to the spot settings to avoid unnecessary side effects or inadequate treatment. Therefore, when choosing the size of the light spot, skin type is an important consideration factor.
10. What is the basic concept of treatment depth?
A. Brightness of pigmentation and pigmentation light
B. The distance and depth at which light penetrates the skin
C. The color of light
D. The frequency of light
Answer:B.The distance and depth at which light penetrates the skin
Analysis:The depth of treatment is a core concept in phototherapy, which directly affects the therapeutic effect. Specifically, treatment depth refers to the depth at which light enters the skin surface and reaches the target tissue. The ability of light to penetrate is crucial in different skin problems. For example, when dealing with surface pigmentation or spots, it is necessary to use short wavelength light that can effectively act at shallower levels. For issues such as vascular dilation in the dermis, long wavelength light is needed to ensure that energy can penetrate deeper into the skin tissue. Therefore, understanding the depth of treatment is crucial for developing effective treatment plans.
