Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
|
|
There are 3 papers published in subject: > since this site started. |
Results per page: |
Select Subject |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
1. Grating-based X-ray Tomosynthesis on Biological Sample | |||
Ran Zhang,Zhiqiang Chen,Li Zhang,Xiaolei Jiang,Hongxia Yin,Zhenchang Wang | |||
Nuclear Science and Technology 04 June 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:X-ray grating-based imaging can provide additional contrast mechanisms other than absorption, namely (differential) phase shift and small-angle scattering. For many biological samples which have poor absorption contrast, the (differential) phase shift and small-angle scattering contrast may provide useful information. Tomosynthesis is a three-dimensional reconstruction technique that aims to separate the overlapping structure of the object with a few projections from a limited angle. In this work, grating-based tomosynthesis with synchrotron radiation source has been performed. Tomosynthetic results using both analytical and iterative reconstruction methods have been compared. It is seen from the results that images reconstructed using iterative method with total variation constraint have better visual effect. | |||
TO cite this article:Ran Zhang,Zhiqiang Chen,Li Zhang, et al. Grating-based X-ray Tomosynthesis on Biological Sample[OL].[ 4 June 2012] http://en.paper.edu.cn/en_releasepaper/content/4479879 |
2. Influence of Transition Region’s Thickness on Calculated Time and Precision in Regional Monte Carlo Dose Calculation | |||
Huaqing ZHENG,Song Gang,Li Gui,Meng Yao,Lan Haiyang,Hu Bitao,Wu Yican | |||
Nuclear Science and Technology 29 April 2009 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The purpose of this study was to explore the influence of transition region’s thickness on calculated time and precision in regional Monte Carlo dose calculation. Monte Carlo code DOSXYZnrc in the EGSnrc system was used to simulate the transport of particles in water phantom, calculate the dose distribution in water phantom with various transition regions’ thickness along and off the central axis. The results showed that along the direction of central axis, the decrease of transition region’s thickness could reduce the calculated time linearly; off the direction of central axis, there was a Gaussian attenuation relationship between transition region’s thickness and calculated time; still had the precision of the ROI(region of interested) been acceptable in clinic when enlarged ROI with reasonable transition region’s thickness. Thereby, in Monte Carlo dose calculation method, when replaced the whole phantom with a reasonable enlarged ROI, the precision of the ROI would be good enough comparing with the result of the whole phantom, while the calculated time would become shorter greatly. | |||
TO cite this article:Huaqing ZHENG,Song Gang,Li Gui, et al. Influence of Transition Region’s Thickness on Calculated Time and Precision in Regional Monte Carlo Dose Calculation[OL].[29 April 2009] http://en.paper.edu.cn/en_releasepaper/content/31813 |
3. Experimental study on heavy ion single event effects in SOI SRAMs | |||
Li Yonghong,He Chaohui,Zhao Fazhan, Guo Tianlei,Liu Gang,Han Zhengsheng,Guo Gang,Liu Jiancheng, Teng rui, Hui Ning,Chen Quan | |||
Nuclear Science and Technology 03 September 2008 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:64K silicon-on-insulator (SOI) SRAMs were exposed to different heavy ions, Cu, Br, I, Kr. Experiment results show that the heavy ion single event upset(SEU) threshold Linear Energy Transfer (LET) in the 64K SOI SRAMs is about 71.8 MeV.cm2/mg. According to the experimental results, the single-event upset rate(SEUR)in space orbits are calculated and they are at the order of 10-13 upset/(day.bit) . | |||
TO cite this article:Li Yonghong,He Chaohui,Zhao Fazhan, et al. Experimental study on heavy ion single event effects in SOI SRAMs[OL].[ 3 September 2008] http://en.paper.edu.cn/en_releasepaper/content/23714 |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
Results per page: |
About Sciencepaper Online | Privacy Policy | Terms & Conditions | Contact Us
© 2003-2012 Sciencepaper Online. unless otherwise stated