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

7.6K
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...
7.6K
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

902
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...
902

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

Relationship between Water-equivalent Diameter, Computed Tomography Dose Indices, and Image Noise in Pediatric Head Computed Tomography Under Active and Inactive Tube Current Modulation.

Journal of medical physics·2026
Same author

Re-evaluating physical shielding in paediatric chest computed tomography: a phantom-based assessment of dose distribution and image quality.

Journal of radiological protection : official journal of the Society for Radiological Protection·2026
Same author

The establishment and implementation of Indonesian diagnostic reference levels: a national framework for optimizing medical radiation exposure.

Radiation protection dosimetry·2026
Same author

Automated Method for Evaluation of Z-axis Laser Alignment Accuracy using the Siemens Computed Tomography Phantom.

Journal of medical physics·2026
Same author

[Towards Further Advances and Internationalization of Radiological Physics and Technology].

Nihon Hoshasen Gijutsu Gakkai zasshi·2026
Same author

A method for automatic low-contrast object segmentation for low-contrast detectability in CT images.

Biomedical physics & engineering express·2026

相关实验视频

Updated: May 5, 2026

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
12:24

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Published on: July 17, 2012

12.3K

边缘扩散函数的统计相位对齐用于计算机断层扫描图像上的调制转移函数测量.

Choirul Anam1, Ariij Naufal1, Lukmanda E Lubis2

  • 1Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Semarang, Central Java, Indonesia.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)
|December 5, 2024
PubMed
概括

本研究提出了边缘扩散函数 (ESF) 阶段对齐的统计方法,以提高计算机断层扫描 (CT) 成像中的调制转移函数 (MTF) 精度,从而实现更可靠的空间分辨率测量.

关键词:
边缘扩散函数 (ESF) 是一个边缘扩散函数.调制传递函数 (MTF) 是一种调制传递函数.阶段对齐的阶段对齐.

更多相关视频

Near Infrared Optical Projection Tomography for Assessments of β-cell Mass Distribution in Diabetes Research
15:18

Near Infrared Optical Projection Tomography for Assessments of β-cell Mass Distribution in Diabetes Research

Published on: January 12, 2013

16.4K
Author Spotlight: An Efficient and Robust Software for Automated Fusion of Multiple Preclinical Imaging Modalities
07:13

Author Spotlight: An Efficient and Robust Software for Automated Fusion of Multiple Preclinical Imaging Modalities

Published on: October 27, 2023

1.1K

相关实验视频

Last Updated: May 5, 2026

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
12:24

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Published on: July 17, 2012

12.3K
Near Infrared Optical Projection Tomography for Assessments of β-cell Mass Distribution in Diabetes Research
15:18

Near Infrared Optical Projection Tomography for Assessments of β-cell Mass Distribution in Diabetes Research

Published on: January 12, 2013

16.4K
Author Spotlight: An Efficient and Robust Software for Automated Fusion of Multiple Preclinical Imaging Modalities
07:13

Author Spotlight: An Efficient and Robust Software for Automated Fusion of Multiple Preclinical Imaging Modalities

Published on: October 27, 2023

1.1K

科学领域:

  • 医学成像物理 医学成像物理
  • 图像质量评估 图像质量评估
  • 定量成像技术 定量成像技术

背景情况:

  • 精确的调制转移函数 (MTF) 测量对于评估计算机断层扫描 (CT) 成像中的空间分辨率至关重要.
  • 边缘扩散函数 (ESF) 阶段对齐是获得可靠的MTF曲线的关键步骤.
  • 由于ESF样本的相位调整不佳,现有的方法可能存在不准确性.

研究的目的:

  • 开发和验证边缘扩散函数 (ESF) 阶段对齐的统计方法.
  • 提高CT图像中调制转移函数 (MTF) 测量的准确性和一致性.
  • 通过CT成像来提高空间分辨率的评估.

主要方法:

  • 使用平均平方误差 (MSE) 开发了一种统计方法,以确定参考和处理的ESF样本之间的最佳相位对齐.
  • 为了找到最小的MSE,ESF样本被系统地转移,表明最好的对齐.
  • 调整ESF的平均值,差异化以获得直线扩散函数 (LSF),然后Fourier转换以生成MTF.
  • 使用各种CT幻影,将对齐和非对齐方法之间的MTF曲线进行了比较.

主要成果:

  • 与非对齐方法相比,开发的相位对齐方法导致了更高和更一致的MTF曲线.
  • 使用统计对齐方法生成的MTF曲线与从点计算幻影中获得的曲线有很好的一致性.
  • 该研究表明,使用拟议的边缘移动方法,空间分辨率测量的准确性提高了.

结论:

  • 对ESF阶段调整的统计方法有效地解决了阶段调整不良的问题.
  • 这种方法为计算机断层扫描成像提供了更准确,更可靠的MTF曲线.
  • 经过验证的技术增强了CT扫描中空间分辨率的定量评估.