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相关概念视频

Computed Tomography01:10

Computed Tomography

4.2K
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...
4.2K
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

2.3K
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: May 20, 2025

Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization
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Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization

Published on: December 2, 2013

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图像重建方法基于C臂计算机断层扫描中的反向投影过算法.

Xianchao Wang1, Qilin Wu2, Pan Xu3

  • 1School of Computer and Artifcial Intelligence, Chaohu University, Hefei, 238024, China. xc_wang@aliyun.com.

Scientific reports
|March 26, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的C臂CT图像重建方法. 与FDK算法相比,它显著降低了辐射剂量,并提高了重建效率.

关键词:
这是BPF算法.在C-手臂CT CT.数据重新排列数据的重新排列.在FDK算法中,FDK算法短时间扫描 短时间扫描

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

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Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph
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Retrospective Cardiac Gating with A Prototype Small-Animal X-ray Computed Tomograph

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Last Updated: May 20, 2025

Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization
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Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization

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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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Published on: February 21, 2025

182

科学领域:

  • 医疗成像医学成像
  • 计算机断层扫描 (CT) 是一种计算机断层扫描.
  • 放射学 放射学是一门学科.

背景情况:

  • 在临床手术指导中,C臂计算机断层扫描 (CT) 是至关重要的.
  • 像FDK这样的现有重建算法在剂量和效率方面存在局限性.
  • 需要在C臂CT中改进图像重建.

研究的目的:

  • 为C臂CT提出一种新的,高效的图像重建方法.
  • 为了降低辐射剂量,同时保持图像质量.
  • 为了提高重建速度和并行性.

主要方法:

  • 使用适用于C臂CT的反向投射过 (BPF) 算法.
  • 在短时间的扫描中收集投影数据.
  • 采用两步的希尔伯特变换来进行3D图像重建.
  • 将短扫描投影数据重新排列成并行投影数据.

主要成果:

  • 与FDK算法相比,辐射剂量减少了近一半.
  • 实现重建效率几乎是FDK算法的两倍.
  • 通过模拟和真实数据实验来证明有效性.

结论:

  • 拟议的方法为C臂CT图像重建提供了显著的进步.
  • 它为临床应用提供了较低辐射剂量的替代方案.
  • 提高效率和并行性使其适用于苛刻的外科环境.