Nanotechnology Now

我们NanoNews文摘赞助商
国际小母牛

Wikipedia Affiliate Button

>vwinchina德赢>以前所未有的速度和分辨率的研究人员捕获的X射线图像:鬼成像方法可以启用详细心脏的电影低剂量X射线

研究人员开发了基于重影,可捕捉快速移动的物体的运动的高分辨率的x射线成像技术。他们用它来创建一个电影中的刀在每秒100,000个旋转框架。CREDIT沙龙Shwartz,巴伊兰大学
研究人员开发了基于重影,可捕捉快速移动的物体的运动的高分辨率的x射线成像技术。他们用它来创建一个电影中的刀在每秒100,000个旋转框架。CREDIT沙龙Shwartz,巴伊兰大学

Abstract:
研究人员已经证明了新的高分辨率的x射线成像技术,其能够捕捉快速移动的物体和快速变化的动态运动。该新方法可以用于移动机械部件的非破坏性成像并捕获先前不可用的医疗X射线成像的生物过程。

Researchers capture X-ray images with unprecedented speed and resolution: Ghost imaging approach could enable detailed movies of the heart with low-dose x-rays

202年8月7日,华盛顿特区|发布0

"The technique we demonstrated can be used with any x-ray source, plus it is low cost, simple and robust," said research team leader Sharon Shwartz from Bar-Ilan University in Israel. "Thus, it opens up the possibility of using x-rays to measure fast dynamics outside the lab."

In The Optical Society (OSA) journal Optics Express, the researchers describe their new x-ray imaging approach, which uses a non-traditional imaging method known as ghost imaging to achieve fast imaging speeds with high spatial resolution. They demonstrate the technique by creating an x-ray movie of a blade rotating at 100,000 frames per second.

“基于此技术的医疗成像系统可以提供医生一种新的诊断工具,” Shwartz说。“我们的方法可以,例如,被用于获取心脏的高清晰度电影,同时大大减少了病人的辐射剂量。”

Seeing through surfaces

X-rays are useful for imaging because of their unique capability to penetrate surfaces that are opaque to visible wavelengths. Traditional x-ray imaging typically uses a pixelated camera with each pixel measuring the intensity level of the x-ray beam at a specific position.

Capturing higher resolution x-ray images requires more pixels, which, in turn, creates huge amounts of data that take time to transfer. This creates a trade-off between imaging speed and spatial resolution that makes it impossible to capture high-speed events with high resolution. Although very specialized techniques involving extremely powerful x-rays can overcome this trade-off, these x-ray sources are only available at large synchrotrons found at a few facilities around the world.

In the new work, the researchers turned to ghost imaging because it uses single-pixel detectors that can improve the imaging speed. Ghost imaging works by correlating two beams -- in this case, X-ray beams -- that do not individually carry any meaningful information about the object. One beam encodes a random pattern that acts as a reference and never directly probes the sample. The other beam passes through the sample. Because very little x-ray power comes into contact with the object being imaged, ghost imaging can also help reduce x-ray exposure when used for medical imaging.

"Although single-pixel detectors can be much faster than pixelated detectors, they do not provide the spatial resolution necessary for image reconstruction," said Shwartz. "We used ghost imaging to overcome this problem and showed that we can image fast dynamics with spatial resolution comparable to or even better than the state-of-the-art x-ray pixelated detectors."

A simple solution

以创建所需的重影成像参考光束,研究人员使用安装在机动阶段标准砂纸来创建记录具有高清晰度,慢帧率像素化X射线摄像机的随机图案。随着阶段移动到每个位置时,X射线束打在砂纸的不同区域,产生随机的X射线发射,或强度波动。

然后,他们移除从x射线束的像素化的摄像头和插入到将被成像的对象和一个单像素探测器。他们移动的机动阶段照射在砂纸的各种位置引入,然后测得的总强度的光束,通过使用单像素探测器击中物体后的强度的波动模式的对象。

要使用此方法图像的快速移动的刀片,研究人员同步与刀片的运动进行测量。把最终的图像然后可以通过与由单像素探测器用于叶片的每个位置测量的强度参考图案相关来重建。

研究人员通过执行图像重建帧接一帧捕获在不同的位置刀片创建的影片移动刀片的。最终的影片清楚地显示出约40微米的空间分辨率的运动 - 近一个数量级比现有的医疗成像系统的分辨率更好。

The researchers are continuing to make improvements to the overall system as well as the image reconstruction algorithm to improve resolution and shorten measurement times.

####

About The Optical Society
Founded in 1916, The Optical Society (OSA) is the leading professional organization for scientists, engineers, students and business leaders who fuel discoveries, shape real-life applications and accelerate achievements in the science of light. Through world-renowned publications, meetings and membership initiatives, OSA provides quality research, inspired interactions and dedicated resources for its extensive global network of optics and photonics experts. For more information, visit osa.org.

About Optics Express

光学快报在光学和光子学的各个方面的科学和技术创新的报告。双周杂志提供的原始,同行评审的论文迅速出版。它是由光学学会(OSA)出版和美国明尼苏达大学的主编,首席詹姆斯率领Leger的。光学快报是一个开放获取期刊,是免费提供的,读者在网上OSA出版。

欲了解更多信息,请点击这里

联系方式:
James Merrick

202-416-1994

@opticalsociety

Media Contact:

版权©The Optical Society

If you have a comment, please联系us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
美味的Digg新闻vineGoogleYahoo书签交易MagnoliacomFurlFacebook的

Related Links

相关新闻新闻

新闻and information

卡弗里讲座内容:建设小和创新的工业影响的艺术August 7th, 2020

180度资本公司于报告第二季度2020周一年,2020年8月10日,并召开电话会议在星期二,2020年8月11日的财务业绩August 7th, 2020

May the force be with you: Detecting ultrafast light by its force: From cell phones to solar cells - research has implications for improvements in a wide range of technologiesAugust 7th, 2020

High-sensitivity atomic force microscopy opens up for photosensitive materialsAugust 7th, 2020

Imaging

High-sensitivity atomic force microscopy opens up for photosensitive materialsAugust 7th, 2020

Tiniest secrets of integrated circuits revealed with new imaging technique2020年8月5日

Bruker Launches Revolutionary High-Speed AFM System for Single-Molecule Applications: JPK NanoRacer� Follows Molecular Dynamics in Real Time at 50 Frames per Second2020年7月30日

可能的期货

高度敏感的多巴胺检测器使用2D材料August 7th, 2020

卡弗里讲座内容:建设小和创新的工业影响的艺术August 7th, 2020

May the force be with you: Detecting ultrafast light by its force: From cell phones to solar cells - research has implications for improvements in a wide range of technologiesAugust 7th, 2020

High-sensitivity atomic force microscopy opens up for photosensitive materialsAugust 7th, 2020

Discoveries

高度敏感的多巴胺检测器使用2D材料August 7th, 2020

卡弗里讲座内容:建设小和创新的工业影响的艺术August 7th, 2020

May the force be with you: Detecting ultrafast light by its force: From cell phones to solar cells - research has implications for improvements in a wide range of technologiesAugust 7th, 2020

High-sensitivity atomic force microscopy opens up for photosensitive materialsAugust 7th, 2020

通告

卡弗里讲座内容:建设小和创新的工业影响的艺术August 7th, 2020

180度资本公司于报告第二季度2020周一年,2020年8月10日,并召开电话会议在星期二,2020年8月11日的财务业绩August 7th, 2020

May the force be with you: Detecting ultrafast light by its force: From cell phones to solar cells - research has implications for improvements in a wide range of technologiesAugust 7th, 2020

High-sensitivity atomic force microscopy opens up for photosensitive materialsAugust 7th, 2020

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

纳米粒子层可提高LED性能和寿命August 7th, 2020

高度敏感的多巴胺检测器使用2D材料August 7th, 2020

May the force be with you: Detecting ultrafast light by its force: From cell phones to solar cells - research has implications for improvements in a wide range of technologiesAugust 7th, 2020

High-sensitivity atomic force microscopy opens up for photosensitive materialsAugust 7th, 2020

NanoNews消化
The latest news from around the world, FREE




顶级产品
NanoNews-Custom
只有你想要阅读的新闻!
学到更多
NanoStrategies
全方位服务,专家咨询
学到更多