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

4.6K
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...
4.6K
Generation of Straight or Branched Actin Filaments01:14

Generation of Straight or Branched Actin Filaments

3.0K
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
3.0K
Radical Chain-Growth Polymerization: Chain Branching01:17

Radical Chain-Growth Polymerization: Chain Branching

2.0K
The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
2.0K
Chair Conformation of Cyclohexane02:02

Chair Conformation of Cyclohexane

14.8K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
14.8K

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

Mechanisms involved in ceramide-induced cell cycle arrest in human hepatocarcinoma cells.

World journal of gastroenterology·2007
Same author

A population-based survey of women's traditional postpartum behaviours in Northern China.

Midwifery·2007
Same author

A glimpse of streptococcal toxic shock syndrome from comparative genomics of S. suis 2 Chinese isolates.

PloS one·2007
Same author

Colon carcinoma cells harboring PIK3CA mutations display resistance to growth factor deprivation induced apoptosis.

Molecular cancer therapeutics·2007
Same author

[Surgical treatment of 402 consecutive cases for hilar cholangiocarcinoma: Chinese single center experience].

Zhonghua wai ke za zhi [Chinese journal of surgery]·2007
Same author

Highly convergent route to cyclopeptide alkaloids: total synthesis of ziziphine N.

Organic letters·2007

相关实验视频

Updated: Jul 29, 2025

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
05:05

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

8.0K

从CBCT使用双链-CycleGANAN使用合成CT生成.

Liwei Deng1, Yufei Ji1, Sijuan Huang2

  • 1Heilongjiang Provincial Key Laboratory of Complex Intelligent System and Integration, School of Automation, Harbin University of Science and Technology, Harbin, 150080, China.

Computers in biology and medicine
|May 27, 2023
PubMed
概括

这项研究通过改进CycleGAN来提高适应性放射治疗的圆束CT (CBCT) 图像质量. 新型号减少了噪音和人工物,改善了用于临床的合成CT (sCT) 图像质量.

关键词:
在CBCT中,CBCT是CBCT.循环GANAN是一个循环.放射疗法是一种放射疗法.分散的纠正纠正分散的纠正合成CTCT是一种合成的CTCT.

更多相关视频

Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
09:10

Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures

Published on: August 5, 2021

1.8K
Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography
04:48

Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography

Published on: November 30, 2022

2.8K

相关实验视频

Last Updated: Jul 29, 2025

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
05:05

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

8.0K
Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
09:10

Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures

Published on: August 5, 2021

1.8K
Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography
04:48

Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography

Published on: November 30, 2022

2.8K

科学领域:

  • 医疗成像医学成像
  • 人工智能在医学中的应用

背景情况:

  • 圆束CT (CBCT) 提供了成本和辐射剂量降低等优势,但受到噪音和人工物的影响,限制了其在适应性放射治疗中的使用.
  • 骨头和金属等人工物显著降低了CBCT图像质量,这给准确的治疗计划带来了挑战.

研究的目的:

  • 提高由CBCT数据生成的合成CT (sCT) 图像的质量,以改善适应性放射治疗应用.
  • 通过开发改进的CycleGAN模型来解决CBCT中的噪音和文物问题.

主要方法:

  • 开发了一个增强的CycleGAN架构,结合了语义信息的多样性分支区块 (DBB) 和训练稳定性的自适应学习速度调整策略 (Alras).
  • 总变化损失 (TV损失) 集成到发电机损失函数中,以促进图像平滑性和降低噪音.
  • 该模型经过训练,从CBCT数据中生成更高质量的sCT图像.

主要成果:

  • 与标准CBCT相比,增强的模型显著减少了图像工件和噪声.
  • 定量指标显示了显著的改善:根平均平方误差 (RMSE) 减少了27.97,平均绝对误差 (MAE) 从43.2提高到32.05,峰值信号对噪声比 (PSNR) 增加了1.61,结构相似度指标 (SSIM) 从0.948提高到0.963,梯度大小相似度偏差 (GMSD) 从12.98降至9.33.
  • 一般化实验证实了该模型在标准CycleGAN和 respath-CycleGAN上的优越性能.

结论:

  • 拟议的CycleGAN改进有效地从CBCT生成高质量的sCT图像,减轻噪音和文物.
  • 这一进步为CBCT在适应性放射治疗中的临床应用带来了重大潜力,使得更准确,更可靠的治疗成为可能.
  • 与现有方法相比,该模型表现出强大的性能和优越的图像质量.