相关实验视频

Updated: Sep 15, 2025

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography

Published on: May 20, 2022

标志性阶段检索:释放第四代源的潜力,用于对生物样本进行增强的基于传播的断层扫描

Alessandro Mirone¹, Joseph Brunet¹, Theresa Urban¹

¹European Synchrotron Radiation Facility, 71 Avenue des Martyrs, F-38000 Grenoble, France.

Journal of synchrotron radiation

|July 17, 2025

概括

一个新的代阶段检索算法,Eikonal阶段检索,通过克服基于同步子X射线相位对比显微镜的局限性来增强成像. 它有效地揭示了复杂样品中低对比度的特征.

科学领域:

的X射线光学.
阶段对比成像成像阶段对比成像
同步子辐射的辐射.

背景情况:

同步子源的进步使X射线相位对比成像的传播距离更长.
这允许对低对比度特征进行增强检测,但受到强相梯度的限制.
现有的单距离相位检索方法在强相位效应违反了线性化假设时失败.

研究的目的:

为近场X射线成像引入一种新的代相位检索算法.
将新算法的性能与帕金宁算法的性能进行比较.
为了证明算法在处理混合衰减对象和文物方面的有效性.

主要方法:

开发一种新的代阶段检索算法,称为Eikonal阶段检索.
与Paganin算法在单色和多色X射线成像中的比较.
通过重新引入线性化近似来进行多色比较的帕加宁算法的推算.

主要成果:

艾科纳尔相位检索算法有效地在整个近场范围内执行相位检索.
它为混合衰减的物体产生优质图像,克服了现有方法的局限性.
即使在标准的第三代同步机设置中,也观察到以前未被解决的文物.

结论:

艾科纳尔相检索方法为混合衰减对象提供了优越的图像质量.
它有效地解决了在延长的传播距离下由强相梯度引起的工件.
该算法在基于同步的相位对比成像中显示了广泛的适用性.

关键词:

一个标志性的近似.代阶段检索的代阶段检索阶段对比断层扫描 (phase-contrast tomography) 是一种相对比断层扫描.基于传播的成像成像技术同步影像成像技术的同步影像成像

更多相关视频

Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography

Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography

Published on: March 12, 2017

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Published on: July 12, 2022

相关概念视频

Electron Microscope Tomography and Single-particle Reconstruction

Electron Microscope Tomography and Single-particle Reconstruction

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...

Imaging Biological Samples with Optical Microscopy

Imaging Biological Samples with Optical Microscopy

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...