【摘 要】
：
Needs in scintimammography applications,especially for small animal cardiac imaging,lead to develop a small field of view,high spatial resolution gamma camera w
【机 构】
：
The Second Artillery Engineering College,Department of Electric Information Engineering,Nuclear Engi
论文部分内容阅读
Needs in scintimammography applications,especially for small animal cardiac imaging,lead to develop a small field of view,high spatial resolution gamma camera with a pinhole collimator.However the ideal pinhole collimator must keep a compromise between spatial resolution and sensitivity.In order to design a pinhole collimator with an optimized sensitivity and spatial resolution,the spatial resolution and the geometric sensitivity response as a function of the source to collimator distance has been obtained by means of Monte-Carlo simulation for a small field of view gamma camera with a pinhole collimator of various-hole diameters.The results show that the camera with pinhole of 1 mm,1.5 mm and 2 mm diameter has respectively spatial resolution of 1.5 mm,2.25 mm and 3 mm and geometric sensitivity of 0.016%,0.022% and 0.036%,while the source to collimator distance is 3 cm.We chose the pinhole collimator with hole diameter size of 1.2 mm for our the gamma camera designed based on the wade-off between sensitivity and resolution.
其他文献
Motivated by the application of (Ti, AI)N alloy compound in the coating layer, the ternary phase diagram of Ti-AI-N was analyzed by the calculation of the phase
Based on the working principle of vibratory excavation of hydraulic excavator, the expression of digging resistance changed with time under sine wave inspiritme
A deconvolution algorithm is proposed to account for the distortions of impulse shape introduced by propagation process.By finding the best correlation of the r
作为世界文明古国之一的中国,有着悠久的文化历史传统。祖国的人文历史、民族风情、山水名胜等得天独厚的条件吸引着来自世界各地的旅游爱好者。旅游业已成为我国主要的支柱
Mobile ad hoc networking(MANET)has become an exciting and important technology in recent years,because of the rapid proliferation of wireless devices.Mobile ad
在新旧格局交替的深刻变动时期,国际社会中的各种矛盾交织,呈现出一幅扑朔迷离的图景.经济全球化和区域一体化把世界各国更加紧密的联系到了一起,在分享全球化带来利益的同时
联盟生成是MAS的一个关键问题,现有的工作主要研究如何针对一个任务生成最优联盟,很少考虑多任务多联盟生成问题(MMG).对MMG问题建立了模型,并进行了分析.在系统能力受限的条
This article considers delay dependent decentralized H∞ filtering for a class of uncertain intercon nected systems,where the uncertainties are assumed to be ti
当企业R&D资源存在互补性时,分析了企业先进行减少成本的R&D投资再在产品市场上进行Bertrand竞争的一类两阶段模型.比较了当R&D分别采取完全竞争和非合作的合资形式时企业相
The complete splitting process of steel fiber reinforced concrete (SFRC) at intermediate strain rate was studied by experiment. The basic information of a self-