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相关概念视频

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
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Computed Tomography

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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...
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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...
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相关实验视频

Updated: May 6, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
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一个开源的图像分析工具箱用于定量视网膜光学一致性断层扫描血管学.

Yalda Amirmoezzi1,2, Mohsen Ghofrani-Jahromi3, Hossein Parsaei1,2

  • 1Department of Medical Physics and Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.

Journal of biomedical physics & engineering
|February 15, 2024
PubMed
概括

一个新的开源软件工具自动化了定量光连贯断层扫描血管学 (OCTA) 分析,以高可靠性改进了管血管区 (FAZ) 和血管密度测量.

关键词:
计算机辅助图像处理 计算机辅助图像处理状血管区域 (FOVAL AVASCULAR ZONE) 是一个八国合作组织 (OCTA)光学连贯性断层扫描技术光学成像技术的成像定量性 OCTA 的数量视网膜 (retina) 是一个视网膜.视网膜血管密度 视网膜血管密度

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Last Updated: May 6, 2026

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科学领域:

  • 眼科医生 眼科 眼科
  • 医疗成像医学成像
  • 生物医学工程 生物医学工程

背景情况:

  • 光学连贯断层扫描血管造影 (OCTA) 对于评估视觉神经和视网膜疾病中的视网膜输液至关重要.
  • 手动OCTA分析管血管区 (FAZ) 和血管指标是耗时的,容易出现错误,并受到操作员的变化影响.

研究的目的:

  • 开发一个开源软件框架用于定量性OCTA (QOCTA).
  • 自动化对OCTA图像的分析,以测量微血管和FAZ形态指数.

主要方法:

  • 一个基于MATLAB的工具箱被开发用于QOCTA分析.
  • 该软件自动量化FAZ参数 (面积,周长,圆度等). 并估计船舶密度 (VD).
  • 三名运营商对21名受试者使用类内相关系数 (ICC) 评估了可靠性.

主要成果:

  • 在表面层测量中实现了高一致性 (ICC>0.9).
  • 对于深层测量 (ICC>0.7) 观察到很好的可靠性.

结论:

  • 开发的QOCTA软件是可靠和高效的.
  • 它可以增强OCTA定量研究,促进统计比较,并有助于了解不同人群的视网膜变异.