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相关概念视频

Computed Tomography01:10

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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Positron Emission Tomography01:29

Positron Emission Tomography

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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Group Polarization01:01

Group Polarization

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Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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极化连贯性矩阵断层扫描 极化连贯性矩阵断层扫描

Youwu He1, Ke Li1, Wangbiao Li1

  • 1Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, Fujian, China.

Journal of biophotonics
|June 3, 2023
PubMed
概括
此摘要是机器生成的。

这项研究引入了极化连贯矩阵断层扫描 (PCMT) 用于全面的组织极化分析. PCMT通过整合极化连贯性和穆勒矩阵来提高极化敏感光学连贯性断层扫描 (PS-OCT),以获得卓越的光学属性确定.

关键词:
穆勒矩阵是穆勒的矩阵.极化连贯性矩阵的两极化.对偏振敏感的光学连贯性断层扫描.类似的转换转换.

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科学领域:

  • 生物医学光学 生物医学光学
  • 医疗成像医学成像
  • 光学物理学的光学物理学

背景情况:

  • 对偏振敏感的光学连贯性断层扫描 (PS-OCT) 对于分析组织光学特性至关重要.
  • 传统的PS-OCT方法在确定完全极化特征时遇到局限性.
  • 精确测量组织偏振对于疾病诊断和理解生物结构至关重要.

研究的目的:

  • 提出和验证一种新的方法,分极连贯度矩阵断层扫描 (PCMT),用于全面确定组织分极性质.
  • 结合两极化连贯矩阵 (PCM) 和穆勒矩阵形式主义来进行增强的组织分析.
  • 克服传统的PS-OCT在相差和信息完整性方面的局限性.

主要方法:

  • PCMT使用类似的转换方法测量生物样本的斯矩阵.
  • 它使用了随机相的四个初始极化状态,基于传统的PS-OCT.
  • 该方法将偏振连贯矩阵计算与穆勒矩阵分析结合在一起.

主要成果:

  • PCMT成功地消除了发生光极化状态之间的相位差异.
  • 来自三个极化状态的极化连贯性矩阵包含样本斯矩阵的完整信息.
  • 穆勒矩阵的16个元素使得使用圆型减弱器和减缓器模型能够推导出完全偏振的光学特性.

结论:

  • 与传统的PS-OCT相比,PCMT在组织中完全确定极化特性方面具有显著的优势.
  • PCM和穆勒矩阵的整合为生物样本的光学表征提供了更强大的框架.
  • 这种先进的技术有望改善生物医学成像和诊断应用.