在局部电磁暴露下评估皮肤模型的空间平均吸收功率密度和峰值温度升高
Jiawen Zheng1, Yu Zhang1, Yinliang Diao1
1College of Electronic Engineering, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou, 510642, China.
Radiation protection dosimetry
|August 16, 2025
概括
将血管纳入电磁剂量计皮肤模型显示,对峰值温度升高的影响很小,在3 GHz时不到8%,对吸收功率密度的影响微不足道.
科学领域:
- 生物物理学的生物物理.
- 计算电磁学 计算机电磁学
- 热建模 热建模 热建模
背景情况:
- 使用多层皮肤模型进行数值剂量测量对于设定暴露限值至关重要.
- 血管系对电磁剂量测量的影响尚未得到充分研究.
研究的目的:
- 研究血管建模对吸收功率密度 (APD) 和皮肤温度升高的影响.
- 开发和整合合成血管模型,用于电磁和热模拟的多层皮肤模型.
主要方法:
- 电磁计算和稳定状态温度上升评估使用佩恩斯生物热传递方程.
- 用和没有血管建模的剂量测量结果在3至30 GHz的频率范围内进行比较.
- 分析不同血管端点直径的影响.
主要成果:
- 血管建模对高峰空间平均APD的影响微不足道.
- 峰值温度上升在3 GHz时受到~8%的影响,在6 GHz以上下降到<3%.
- 血管终点直径的影响是边际的.
结论:
- 血管建模对皮肤剂量测量中的峰值温度上升有适度的影响.
- 血管系统的加入提炼了局部热分布,有助于解剖模型的改进.
- 由于血管建模的当前变化比组织属性变化的变化要小.
相关概念视频
Absorption of Radiation
820
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
820
Radiation: Applications
1.2K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.2K
Biological Effects of Radiation
15.9K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
15.9K
Radiation Pressure: Problem Solving
459
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
459
Pigmentation
2.6K
The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
2.6K


