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相关概念视频

Electron Microscope Tomography and Single-particle Reconstruction01:07

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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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Computed Tomography01:10

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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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Imaging Studies III: Computed Tomography01:27

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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: Sep 12, 2025

Non-invasive 3D-Visualization with Sub-micron Resolution Using Synchrotron-X-ray-tomography
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使用稀疏度利用高角度分辨率的纹理断层扫描.

Mads Carlsen1, Florencia Malamud1, Peter Modregger2,3

  • 1Paul Scherrer Institut 5232 Villigen PSI Switzerland.

Journal of applied crystallography
|August 8, 2025
PubMed
概括
此摘要是机器生成的。

这项研究提出了一种用于从复杂材料中重建X射线衍射断层扫描数据的新方法. 这种方法使得微观结构的详细3D映射成为可能,即使在像射击-peened martensite这样具有挑战性的样本中也是如此.

关键词:
三维X射线衍射的三维X射线.3D-XRD 3D-XRD是什么意思电脑断层扫描是X射线衍射计算的.在XRD-CT中使用XRD.质地分析,质地分析.断层扫描 (tomography) 是一个非常重要的技术.

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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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相关实验视频

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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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科学领域:

  • 材料科学 材料科学 材料科学
  • 晶体学 晶体学是指结晶学.
  • 数据科学数据科学数据科学

背景情况:

  • 扫描探头X射线衍射断层扫描对于分析材料微观结构至关重要.
  • 从具有稀疏纹理的异型多晶样品中重建数据存在重大挑战.
  • 现有的方法经常与含有小,高度马赛克晶体域的样本作斗争.

研究的目的:

  • 开发一种用于扫描探头X射线衍射断层扫描数据的新型重建方法.
  • 为了在3D批量样本中实现定向分布函数的稳定,高分辨率的映射.
  • 克服现有方法的局限性,特别是对于纹理稀疏和马赛克微观结构的样品.

主要方法:

  • 重建一个包含每个voxel的方向分布函数的voxel地图.
  • 在定向空间中利用非负性,对稀疏纹理具有特定的基础函数.
  • 避免传统的峰值寻找步骤,使该方法适用于具有挑战性的晶体结构.

主要成果:

  • 在高角度分辨率下实现稳定解决方案,即使在未确定的场景中.
  • 成功地绘制了在一颗被喷涂的马石样本内部的结合微观结构.
  • 已证明适用于具有马赛克微观结构的类,只需要单个旋转轴.

结论:

  • 开发的方法为X射线衍射断层断层扫描数据重建提供了一个强大的方法.
  • 它有效地处理异型多晶样品,并利用纹理稀疏性进行高效的数据采集.
  • 这种技术扩大了分析散装材料中的复杂微观结构的能力,而无需解决单个格子域.