相关实验视频
Updated: Jul 28, 2026

09:17
Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
21.7K
使用双流注意力神经网络,基于视网膜图像来描述轻度认知障碍
Hebei Gao1, Shuaiye Zhao2, Gu Zheng3
1School of Artificial Intelligence, Wenzhou Polytechnic, Wenzhou, 325035, China; Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Eye Hospital, Wenzhou Medical University, Wenzhou, 325000, China.
Computers in biology and medicine
|September 22, 2023
概括
这项研究开发了一个使用视网膜图像来检测轻度认知障碍 (MCI) 的AI模型. 该模型实现了高精度,显示了早期诊断认知衰退的潜力.
科学领域:
- 眼科和神经病学 眼科和神经病学
- 人工智能在医学中的应用
- 生物医学成像分析分析
背景情况:
- 轻度认知障碍 (MCI) 是正常认知和痴呆症之间的关键阶段,需要早期检测才能进行有效的干预.
- 视网膜成像正在成为确定MCI的有希望的非侵入性生物标志物.
- 目前对MCI的诊断方法可能具有侵入性或缺乏早期检测的敏感性.
研究的目的:
- 开发和评估一个双流注意力神经网络,用于使用多模式视网膜图像对MCI患者进行分类.
- 调查跨模式融合和注意力机制在分析光学连贯断层扫描 (OCT) 和 fundus图像中MCI检测的有效性.
- 为了确定特定的视网膜成像特征,表明认知障碍.
主要方法:
- 设计了一个双流注意力神经网络,结合了跨模式融合,可变规模的密集残余模型和多层次的特征聚合.
- 采用自我注意和交叉注意模块来融合来自OCT和fundus模式的特点.
- 使用梯度加权类激活映射 (Grad-CAM) 来识别可预测的视网膜生物标志物.
主要成果:
- 拟议的神经网络在MCI分类方面实现了84.96%的高精度,在认知障碍测试分数分类方面达到80.90%.
- 该模型成功地区分了患有MCI,阿尔茨海默病和健康对照的个体.
- 确定了与MCI预测相关的特定视网膜成像生物标志物,不包括视神经头部特征.
结论:
- 开发的双流注意力神经网络显示了使用多模式视网膜成像来早期检测MCI的巨大潜力.
- 视网膜成像分析提供了一种有价值的非侵入性方法,用于识别有认知能力下降风险的个体.
- 这种人工智能驱动的方法强调了眼科数据在神经健康评估中的重要性.
相关概念视频
Vision
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Visual System
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
Parallel Processing
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Visual Agnosia
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
Prosopagnosia
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...

