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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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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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相关实验视频

Updated: Jun 15, 2025

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

Published on: August 16, 2012

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有效的本地古典影子断层扫描与数量保存.

Sumner N Hearth1, Michael O Flynn1, Anushya Chandran1

  • 1Department of Physics, <a href="https://ror.org/05qwgg493">Boston University</a>, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA.

Physical review letters
|August 23, 2024
PubMed
概括
此摘要是机器生成的。

我们开发了一种新的全对影子协议,用于量子断层扫描,用于具有数量保存定律的系统,如超冷原子. 这种方法使用两体门和线性时间算法高效地重建了几体可观测值.

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Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging
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Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

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Author Spotlight: Integrating Ultrasound Imaging with Biochemical Markers for Thyroid Disease Diagnosis
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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:

  • 量子信息科学是一种量子信息科学.
  • 凝聚物质物理学 凝聚物质物理学
  • 超冷原子系统中的超冷原子系统.

背景情况:

  • 影子断层扫描经典地使用随机测量来描述量子状态.
  • 现有的单体影子协议是高效的,但对于数量保存的系统是失败的.

研究的目的:

  • 提出和分析一个新的局部影子协议,用于量子系统的数量保存规律.
  • 为了能够有效地重建在这样的系统中观察到的少数物体.

主要方法:

  • 开发了使用一层两体门的全对协议.
  • 导出了利用 permutation 对称性的线性时间后处理算法.
  • 将协议应用于任何空间维度的硬核玻色子和无旋转费米子.

主要成果:

  • 全对协议用多元 (V) 样本重建任意的少体可观测量.
  • 证明了两点和四点函数的原理证明重建.
  • 成功应用于硬核玻色子配对的卢廷格液体.

结论:

  • 全对协议克服了保护系统的单体影子方法的局限性.
  • 这项工作为超冷原子的量子态表征提供了一个实用的工具.
  • 开发的算法为量子断层扫描提供了高效的后处理.