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

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

13.2K
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
13.2K
Computed Tomography01:10

Computed Tomography

4.5K
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...
4.5K

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

Assessment of dosimetric sensitivity enhancement of xylenol orange Fricke gel by AuNPs: optical and MR imaging investigation.

Physics in medicine and biology·2023
Same author

A Meta-analysis of the Efficacy and Safety of Stereotactic Arrhythmia Radioablation (STAR) in Patients with Refractory Ventricular Tachycardia.

Clinical oncology (Royal College of Radiologists (Great Britain))·2023
Same author

Characterization of novel polydiacetylene gel dosimeter for radiotherapy.

Biomedical physics & engineering express·2021
Same author

Biological X-ray irradiator characterization for use with small animals and cells.

Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas·2017
Same author

Three-dimensional quality assurance of IMRT prostate plans using gel dosimetry.

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)·2017
Same author

Enhanced UV Emission From Silver/ZnO And Gold/ZnO Core-Shell Nanoparticles: Photoluminescence, Radioluminescence, And Optically Stimulated Luminescence.

Scientific reports·2015

相关实验视频

Updated: Jun 23, 2025

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography CT and Light Microscopy LM Correlated with Scanning Electron Microscopy SEM
10:42

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography CT and Light Microscopy LM Correlated with Scanning Electron Microscopy SEM

Published on: June 16, 2016

9.3K

一个基于融合光源的圆光束光学CT - 描述和优化.

M A Silveira1, J F Pavoni1, O Baffa1

  • 1Departamento de Física, FFCLRP, University of São Paulo-USP, Ribeirão Preto, SP, Brazil.

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)
|June 20, 2024
PubMed
概括

这项研究开发了一种经济的圆束光学计算机断层扫描仪,用于3D剂量测量. 该系统使用融合光束来提高图像质量,并准确测量辐射剂量以确保质量.

关键词:
3D-剂量测量 3D-剂量测量圆光束光学CT的圆光束.凝剂量测量 凝剂量测量光学CT CT 光学CT

更多相关视频

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
08:41

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

Published on: August 16, 2012

11.5K
A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
07:10

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

5.1K

相关实验视频

Last Updated: Jun 23, 2025

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography CT and Light Microscopy LM Correlated with Scanning Electron Microscopy SEM
10:42

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography CT and Light Microscopy LM Correlated with Scanning Electron Microscopy SEM

Published on: June 16, 2016

9.3K
Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
08:41

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

Published on: August 16, 2012

11.5K
A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
07:10

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

5.1K

科学领域:

  • 医学物理 医学物理
  • 光学工程是指光学工程.
  • 放射治疗 物理 物理

背景情况:

  • 精确的3D剂量测量对于放射治疗质量保证至关重要.
  • 传统的剂量测量方法可能耗时且缺乏空间分辨率.
  • 光学计算机断层扫描 (OCT) 为3D剂量验证提供了一个有希望的替代方案.

研究的目的:

  • 开发和验证一个经济的形光束光学计算机断层扫描 (OCT) 扫描仪用于3D剂量测量.
  • 优化OCT系统使用融合光束来最大限度地减少散光和提高图像质量.
  • 评估用于临床应用开发的OCT系统的剂量测量性能.

主要方法:

  • 使用弗雷内尔透镜和点状光源设计了一个形光束OCT系统,以创建一个收光束.
  • 使用调制转移函数 (MTF) 和偏离到初级比率测量来评估光学性能.
  • 使用SIRT-TV评估了重建质量,优化了对比度和噪声比率 (CNR) 的规范化参数.
  • 用FXO-f凝剂量计测量百分比深度剂量 (PDD) 并与电离室数据进行比较,以验证剂量表性能.

主要成果:

  • 海外国家和地区系统实现了MTF值>=50%和流浪与初级比率低于0.1.1.
  • 重建显示低噪音和文物,在0.01.的规范化参数 (λ) 时达到最佳的CNR.
  • 光学CT衍生的衰减系数与光谱仪测量结果非常相匹配 (在1.2%以内).
  • 使用FXO-f凝剂量计进行的PDD测量显示与电离室数据 (<1.2%的差异) 有很好的一致性,剂量分辨率为0.1 Gy.

结论:

  • 开发的形光束OCT系统,通过融合光束进行优化,适用于临床放射治疗中的3D质量保证.
  • 这种经济的OCT扫描仪提供了准确和高效的3D剂量测量,增强了治疗验证.
  • 这项研究证明了OCT在放射治疗中常规临床实施的潜力.