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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 27, 2025

Three-Dimensional Imaging of Tumor-Bearing Tissue Using the Iterative Bleaching Extends Multiplexity Approach
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Three-Dimensional Imaging of Tumor-Bearing Tissue Using the Iterative Bleaching Extends Multiplexity Approach

Published on: April 25, 2025

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稀疏视图圆束计算机断层扫描基于新的多梯度方向总变化的代重建.

Junlong Cui1,2, Yong Hou3, Zekun Jiang4,5

  • 1Department of Cancer Center, The Second Hospital of Shandong University, Jinan, Shandong Province, China.

Journal of cancer research and therapeutics
|April 30, 2024
PubMed
概括

这项研究引入了一种新的多梯度方向总变化方法,用于从稀疏数据中准确的形光束计算机断层扫描 (CBCT) 重建. 与现有方法相比,新方法显著提高了图像质量和准确性.

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Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging
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相关实验视频

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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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科学领域:

  • 医疗成像医学成像
  • 计算成像技术的成像
  • 图像重建 图像的重建

背景情况:

  • 精确的束计算机断层扫描 (CBCT) 从稀疏投影的重建至关重要.
  • 压缩传感被广泛用于CBCT重建.
  • 传统的总变化 (TV) 方法使用有限的梯度信息.

研究的目的:

  • 为CBCT重建开发一种新的多梯度方向总变化最小化方法.
  • 为了提高CBCT图像的准确性和质量,从稀疏的数据重建.

主要方法:

  • 引入了一种新的多梯度方向总变化最小化方法.
  • 使用了ij,ik和jk坐标方向 (九种梯度类型) 的梯度信息.
  • 评估了使用数字幻影,患者头部数据和物理幻影的方法.

主要成果:

  • 拟议的方法实现了最小的根平均平方误差 (RMSE).
  • 提出的方法产生了最高的结构相似度指数 (SSIM).
  • 与其他方法相比,重建的图像显示出优越的边缘结构保存.

结论:

  • 新的多梯度方向电视方法显示了改善CBCT重建的巨大潜力.
  • 这种方法提高了重建的CBCT图像的质量和准确性.
  • 该方法在稀疏视图CBCT成像中提供了有前途的进步.