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相关概念视频

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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X-ray Imaging01:24

X-ray Imaging

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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Magnetic Resonance Imaging01:24

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Imaging Studies II: Ultrasonography01:24

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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Updated: Jan 28, 2026

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

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通过metasurface实现的快照高光谱成像

Ningzhi Xie1, Vishwanath Saragadam2, Johannes E Fröch1,3

  • 1Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, United States.

Nano letters
|January 26, 2026
PubMed
概括
此摘要是机器生成的。

我们开发了一个新的快照超光谱成像系统,使用超表面代码面具. 这款紧型相机提供高光谱和空间分辨率,适用于农业,环境监测和医学领域的应用.

关键词:
过器的过器是一个过器.超光谱成像技术的使用.metasurface 地表的表面是什么

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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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科学领域:

  • 光学和光子学 在光学和光子学.
  • 影像科学 影像科学
  • 材料科学 材料科学 材料科学

背景情况:

  • 超光谱成像为精准农业,环境监测和医学诊断提供了丰富的光谱数据.
  • 由于其复杂的设计,传统的高光谱系统面临速度,分辨率和光效的限制.

研究的目的:

  • 引入一种新的快照超光谱成像系统,克服传统方法的局限性.
  • 为了展示一个紧而高效的高光谱摄像机,使用地表技术.

主要方法:

  • 开发一个快照超光谱成像系统,其中包含一个超表面代码面罩.
  • 压缩传感重建算法的应用用于数据处理.
  • 系统的空间分辨率,光谱带和光子效率的表征.

主要成果:

  • 概念验证系统实现了200 × 140像素的空间分辨率.
  • 该系统在480-680nm波长范围内捕获了21个光谱波段.
  • 记录了39%的高光子效率,表明光的有效利用.

结论:

  • 超表面支持的超光谱成像为开发超紧型高性能摄像机提供了一个有前途的途径.
  • 展示的系统在现有技术上取得了显著的进步,在各种科学领域开辟了新的可能性.