反射在短距离的光学特性上的依赖性 (B部分:实验验证)
Djazia Yacheur1, Letizia Lanini2, Tong Li2
1Biomedical Optics Research Laboratory (BORL), Department of Neonatology, University Hospital Zurich and University of Zurich, Zurich, Switzerland. dyacheur@student.ethz.ch.
Advances in experimental medicine and biology
|January 23, 2026
概括
在短距离上精确的光学性能测量对于临床诊断至关重要. 使用MHG和GB模型进行修改的蒙特卡洛模拟,与传统的HG模型相比,提高了反射率数据的准确性.
科学领域:
- 生物医学光学 生物医学光学
- 医疗成像医学成像
- 组织光学 组织光学
背景情况:
- 生物组织的光学特性对于临床见解至关重要,例如血红蛋白氧化和癌症检测.
- 由于空间限制,近距离测量 (<1厘米) 对于新生儿监测和内镜成像至关重要.
研究的目的:
- 研究组织光学特性与短距离反射率之间的关系.
- 用实验数据和修改的蒙特卡洛 (MC) 模拟来进行这项调查.
主要方法:
- 创建了12个具有不同光学特性的幻影.
- 使用商业频域近红外光谱系统验证的幻影.
- 在短距离 (1.5-5毫米) 的源探测器进行反射强度测量.
- 采用了修改后的MC模拟与修改后的Henyey-Greenstein (MHG) 和 Gegenbauer (GB) 阶段函数.
主要成果:
- 反射率数据显示出明显的依赖于吸收和散射系数.
- 与传统的Henyey-Greenstein (HG) 模型相比,MHG和GB模型对实验数据的适应性更好.
- 高的类内相关系数 (0.982为MHG,0.979为GB) 证实了与实验数据的改进一致.
结论:
- 修改后的MC模拟器准确地模拟了短距离的实验反射率数据.
- MHG和GB模型为光学属性确定提供了比HG模型更高的精度.
- 这些进步支持改进的光学成像和诊断应用,特别是用于早产婴儿外周氧化监测.
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