分析模型的评估,以估计生物介质中的光物体的深度
Héctor A García1,2, Hang M Nguyen1, Caleb Y Kwon1
1Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, United States.
Journal of biomedical optics
|February 25, 2026
概括
使用比度光分析对地下结构进行准确的深度估计,需要在理论模型和实验条件之间精确匹配. 这确保了实时临床应用的可靠的非侵入性测量.
科学领域:
- 生物医学光学 生物医学光学
- 医疗成像医学成像
- 光光谱学 光光谱学
背景情况:
- 对光信号的比度分析提供了地下结构的非侵入性实时深度估计.
- 现有的方法,包括单次激发-多次排放和多次激发-单次排放方法,已经显示出可变的准确性.
- 诸如组织几何学,包容性特征和激发源光谱等因素在分析模型中经常被忽视.
研究的目的:
- 为了研究未解决因素对比度光深度估计的影响.
- 开发一个改进的理论框架,包括组织几何学,包容性和光谱特征.
- 用蒙特卡洛模拟和幻影实验验证前列腺组织光学特性来验证增强模型.
主要方法:
- 使用蒙特卡洛 (MC) 模拟进行模型验证.
- 用绿色氨酸作为光对比剂进行了幻影实验.
- 专注于前列腺组织在宽波长范围内 (550-900 nm) 具有特征的光学特性.
主要成果:
- 多次刺激-单次排放方法受到组织几何学和包容性特征等因素的显著影响.
- 像前列腺这样的组织中的低光学性质可变性对多发射方法中的深度重建产生负面影响.
- 准确的深度估计取决于理论模型对实验条件的忠实性.
结论:
- 准确的非侵入性深度估计通过比度光需要一个理论模型,准确地反映实验条件.
- 仔细调整模型假设与测量环境对于可靠的数据解释至关重要.
- 选择比度策略和准确的建模是成功进行地下结构分析的关键.
相关概念视频
01:29Two-Dimensional Microscopy in Microbiology
1.8K
Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
1.8K
01:27Microbial Growth Measurement: Indirect Methods
2.3K
Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
2.3K
01:30Methods to Assess Microbial Populations
100
Assessing microbial populations is crucial for understanding microbial roles in health, ecology, and industry. Various complementary techniques—both culture-based and molecular—enable detailed analysis of microbial abundance, diversity, and function.Viable Plate CountThe viable plate count is a traditional culture-based method used to estimate the number of living microbes in a sample. After serial dilution, the sample is spread onto nutrient agar plates. Each viable cell forms a...
100