• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议> >Assessment of the effective attenuation coefficient of scattering media illuminated by a LED array : Effect of the beam size
【24h】

Assessment of the effective attenuation coefficient of scattering media illuminated by a LED array : Effect of the beam size

机译：评估由LED阵列照射的散射介质的有效衰减系数：光束大小的影响

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The knowledge of the light fluence rate distribution inside a biological tissue irradiated by a Laser (or LED) is fundamental to achieve medical treatments. In this paper, a semi-infinite tissue model was considered, and the steady-state photon diffusion equation was solved by means of the 2-D Fourier Transform. This method can be applied to any irradiation source (cylindrically symmetric or not) at the surface of the tissue. Two particular beam shapes are studied: planar irradiation and flat beam with finite radius. The total fluence rate along the depth in tissues was computed by adding the collimated and the diffuse components. The analytical solution was also used to study the effect of the beam radius on the light attenuation. Measurements were performed using a tank filled with a liquid-simulating medium (Milk), illuminated with a LED array (660 nm , 100mm × 100mm). Several circular diaphragms were used in order to obtain uniform beams with specific radii. An optical fiber (with an isotropic tip) was used to measure the fluence rate inside the medium. Preliminary experimental results are in agreement with theoretical predictions.
机译：了解激光（或LED）照射的生物组织内部的光通量率分布是实现医学治疗的基础。本文考虑了一个半无限组织模型，并利用二维傅立叶变换求解了稳态光子扩散方程。该方法可以应用于组织表面的任何辐射源（圆柱对称或非圆柱对称）。研究了两种特殊的光束形状：平面辐射和具有有限半径的平面光束。通过将准直分量和扩散分量相加，可以计算出沿组织深度的总注量率。分析解决方案还用于研究光束半径对光衰减的影响。使用装有液体模拟介质（牛奶）的罐进行测量，并用LED阵列（660 nm，100mm×100mm）照射。为了获得具有特定半径的均匀光束，使用了多个圆形膜片。使用光纤（具有各向同性的尖端）来测量介质内部的注量率。初步实验结果与理论预测相符。

著录项

  • 来源
    《》|2015年|954213.1-954213.8|共8页
  • 会议地点 Munich(DE)
  • 作者

    Jean-Yves Le Pommellec; Vianney Piron; Mohamed-Lamine Askoura; Jean-Pierre LHuillier;

  • 作者单位

    Arts et Metiers ParisTech CER Angers LAMPA, 2 Boulevard du Ronceray, BP 93525, 49035 Angers cedex 01, France;

    Arts et Metiers ParisTech CER Angers LAMPA, 2 Boulevard du Ronceray, BP 93525, 49035 Angers cedex 01, France;

    UNAM Universite, SFR 4207 QUASAV, Groupe ESA (Ecole superieure d'agriculture), UPSP GRAPPE (Groupe de Recherche Agro-Alimentaire sur le Produit et Precedes), 55 Rue Rabelais - BP 30748, 49007 ANGERS Cedex 01, France;

    Arts et Metiers ParisTech CER Angers LAMPA, 2 Boulevard du Ronceray, BP 93525, 49035 Angers cedex 01, France;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tissue-optics; Diffusion approximation; 2-D Fourier transform modelling; Effective attenuation coefficient; Beam size;

    机译：组织光学；扩散近似；二维傅立叶变换建模；有效衰减系数；光束尺寸;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号