用静止代方法对光学连贯性断层扫描的深度依赖衰减和反向散射的特征
Yaning Wang1, Shuwen Wei1, Jin U Kang1
1Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States.
Journal of biomedical optics
|August 28, 2023
概括
这项研究引入了一种新的光学连贯断层扫描 (OCT) 方法,可以同时准确测量组织光学特性,如衰减和反向散射. 这有助于改善海外和海外国家的图像质量,并有助于诊断复杂疾病.
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:
- 光学一致性断层扫描 (OCT) 对于提取组织光学特性至关重要,如衰减系数和反向散射分数,用于诊断应用.
- 现有的减弱估计模型通常假定统一的反向散射分数,这对于真正的生物组织来说是不准确的.
研究的目的:
- 开发一个可靠的模型,同时计算来自OCT信号的深度减弱和反向散射分数.
- 使用衍生光学特性创建一个OCT图像减弱补偿模型,以增强组织可视化.
主要方法:
- 使用了带有约束条件的静态代方法来导出减弱和反向散射分数的解决方案.
- 纳入背散分数的大变化以纠正估计,而忽略了较小的变化.
- 基于计算的结构信息,开发了一个减弱补偿模型,以改进海外国家和地区的强度概况.
主要成果:
- 在模拟,幻影实验和ex vivo组织中实现了衰减和反射散射分量的强大而精确的估计.
- 证明补偿模型在整个成像深度上显著改善了OCT图像分辨率.
- 使用OCT A-line模拟,蒙特卡洛建模和实验数据验证了该方法的准确性和精度.
结论:
- 拟议的方法纠正了由反向散射变化引起的估计偏差,使光学属性的同时,深度分辨率测量成为可能.
- 这种方法不需要先前的形态信息,并准确地模拟现实组织.
- 该方法具有显著的潜力,可以改善复杂的生物组织中基于OCT的疾病诊断.
更多相关视频
08:50Longitudinal Morphological and Physiological Monitoring of Three-dimensional Tumor Spheroids Using Optical Coherence Tomography
Published on: February 9, 2019
7.7K
07:44In vivo Structural Assessments of Ocular Disease in Rodent Models using Optical Coherence Tomography
Published on: July 24, 2020
3.0K
相关概念视频
01:10Computed Tomography
4.6K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
4.6K
01:27Imaging Studies III: Computed Tomography
26
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
26