Electromagnetic properties of tissue in the optical region
Electromagnetic properties of tissue in the optical region
复制标题
光学区域组织的电磁特性
DOI：
10.1117/12.715202
复制
发表时间：
2007
影响因子：
38.3
通讯作者：
W. Roach
中科院分区：
文献类型：
--
作者：
K. Yaws;D. Mixon;W. Roach
为了正确评估光子暴露对皮肤造成的损害，研究了光子衰减和随后的热产生的机制。目前，空洞存在于频率特定的电磁特性中，例如定义折射率和衰减值所必需的复介电常数和电导率。我们在血液、骨骼、皮肤、玻璃体、角膜、视网膜和许多其他组织中研究这些特性。在这些组织中，由于衰减，光子能量会呈指数级下降。由于组织中吸收的光子能量在许多情况下表示为热，因此材料的介电性质也将随着加热模式以及频率或波长的变化而变化。相反，组织热特性的变化应该随着色散特性的变化而改变光子行为。在我们的例子中，我们关注的是现有的数据和理论上确定大范围频率或波长上的色散特性。
To properly assess skin damage caused by photonic exposure, the mechanisms of photon attenuation and subsequent heat production are investigated. Currently, voids exist in frequency specific electromagnetic properties such as the complex dielectric permittivity and conductivity necessary to define refractive index and attenuation values. We investigate these properties in several tissues such as blood, bone, skin, vitreous humor, cornea, retina and many others. Inside these tissues, exponential decrease in photon energy occurs due to attenuation. Because photon energy absorbed in tissue is expressed as heat in many instances, it follows that the dielectric properties of the material will also change as a function of the heating patterns as well as with frequency or wavelength. Conversely, changes in tissue thermal properties should change photon behavior as dispersion properties change. In our case we are concerned with existing data and theoretically determining dispersion properties over a large range of frequencies or wavelengths.