Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Computed Tomography01:10

Computed Tomography

7.9K
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...
7.9K
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

251
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...
251
X-ray Imaging01:24

X-ray Imaging

9.7K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
9.7K
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

451
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
451
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

2.8K
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...
2.8K
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

758
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
758

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Correction: Association between TyG-BMI and early-onset hypertension: evidence from NHANES.

Scientific reports·2026
Same author

Characterization of Cocrystal Formation Structure of Nitrofurantoin and Urea Based on Terahertz and Raman Spectroscopy Combined with DFT Calculation.

The journal of physical chemistry. B·2025
Same author

Association between TyG-BMI and early-onset hypertension: evidence from NHANES.

Scientific reports·2025
Same author

Fermented Bamboo Fiber Improves Productive Performance by Regulating Gut Microbiota and Inhibiting Chronic Inflammation of Sows and Piglets during Late Gestation and Lactation.

Microbiology spectrum·2023
Same author

Effects of Dietary Supplementation of gEGF on the Growth Performance and Immunity of Broilers.

Animals : an open access journal from MDPI·2021
Same author

Coenzyme Q<sub>10</sub> Sunscreen Prevents Progression of Ultraviolet-Induced Skin Damage in Mice.

BioMed research international·2020

相关实验视频

Updated: Jan 7, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

14.8K

在X射线计算机断层扫描中通过稀疏共变矩阵估计进行编码孔径优化.

Yuqi Jiang1,2, Tianyi Mao3, Jianyong Zhou1

  • 1The 44th Research Institute of China Electronics Technology Corporation, Chongqing 400060, China.

Sensors (Basel, Switzerland)
|December 31, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种稀疏共变矩阵方法,以减少大型图像的编码孔径X射线计算机断层扫描 (CAXCT) 中的信息损失. 该方法优化了编码的光圈,实现了与现有的增强图像重建方法可比的性能.

关键词:
编码的光圈孔口.计算机断层扫描 (CT) 是一种计算机断层扫描.一个协差矩阵.优化的优化优化优化.

更多相关视频

Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition
08:16

Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition

Published on: March 19, 2021

4.9K
Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis
06:56

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

Published on: September 22, 2023

1.6K

相关实验视频

Last Updated: Jan 7, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

14.8K
Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition
08:16

Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition

Published on: March 19, 2021

4.9K
Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis
06:56

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

Published on: September 22, 2023

1.6K

科学领域:

  • 医疗成像医学成像
  • 计算成像技术的成像
  • 应用数学 应用数学 应用数学

背景情况:

  • 编码孔径X射线计算机断层扫描 (CAXCT) 从编码的投影中重建物体内部.
  • 目前的CAXCT方法是计算密集型的,限制了图像大小和重建质量.
  • 优化编码光圈对于提高CAXCT性能至关重要.

研究的目的:

  • 开发一种计算效率高的方法,以尽量减少CAXCT预测中的信息丢失.
  • 为了使大型断层图像的重建使用优化的编码孔径.
  • 为了提高 CAXCT 中重建图像的质量.

主要方法:

  • 引入了稀疏共变矩阵估计方法来量化投影信息重叠.
  • 使用块矩阵乘法和稀疏估计来导出协差矩阵.
  • 开发了一个具有噪声因子的启发式算法,以确定编码的光圈元素 (D) 的最佳组合,以获得最大的非重叠信息.

主要成果:

  • 拟议的稀疏共变矩阵方法显示了与模拟数据集上的最先进技术可比的优化性能.
  • 成功地对大512 × 512图像进行了编码的光圈优化.
  • 对共同变量矩阵系数的分析显示了稀疏性,通过分析 <0.02% 的系数捕获了重要的信息.

结论:

  • 稀疏共变矩阵估计方法有效地减少了CAXCT中的信息损失,使大图像重建成为可能.
  • 该方法提供了一个计算效率高的替代方案,用于优化X射线计算机断层扫描中的编码孔径.
  • 这项工作推进了CAXCT,为高分辨率图像重建提供了可扩展的解决方案.