Development of computed tomography instrument for college teaching

LIU Fenglin LU Yanping WANG Jue

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Development of computed tomography instrument for college teaching

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- Development of computed tomography instrument for college teaching
- NUCLEAR TECHNIQUES Issue 7, (2006)
- 作者机构：
  
  1. 重庆大学光电技术及系统教育部重点实验室ICT研究中心
  2. 重庆大学光电技术及系统教育部重点实验室ICT研究中心,重庆,400030
- 作者简介：
- 基金信息：
  
  教育部世界银行贷款招标项目(FET-GJ-011)
- DOI：
  CLC： TP391.4
- Published：01 July 2006
- 稿件说明：
移动端阅览
[1]刘丰林,卢艳平,王珏.教学用工业CT实验仪器的设计与开发研究[J].核技术,2006(07):556-560.

LIU Fenglin LU Yanping WANG Jue. Development of computed tomography instrument for college teaching[J]. Nuclear techniques, 2006, (7): 556-560.
[1]刘丰林,卢艳平,王珏.教学用工业CT实验仪器的设计与开发研究[J].核技术,2006(07):556-560. DOI：

LIU Fenglin LU Yanping WANG Jue. Development of computed tomography instrument for college teaching[J]. Nuclear techniques, 2006, (7): 556-560. DOI：

摘要

计算机层析成像（CT）技术采用射线从多个角度穿透物体来重建断层图像或三维图像

该技术已经广泛地应用于医学诊断和治疗、工业无损检测和无损评价。因此

对于大学学生来讲

了解和掌握CT技术的基本原理具有重要意义。本文详细介绍了用于大学教学的CD-50BG型CT实验仪。该仪器采用“平移+旋转”的扫描方式

具有活度为0.74GBq的Csγ射线源、单个塑料闪烁体+光电二极管的探测器和50mm的视场137直径

其中射线源安装在钨合金的屏蔽容器中。同时

开发了图像处理软件对采集数据进行处理

重建断层图像和重构三维图像。重建断层图像可达到1lp/mm的空间分辨率和1%的密度分辨率。目前

已经有包括清华大学、北京大学在内的十余所高校将该仪器用于基础教学。

Abstract

Computed tomography (CT)

which uses penetrating radiation from many directions to reconstruct cross-sectional or 3D images of object

has widely applied in medical diagnosis and treatment

industrial NDT and NDE. So it is significant for college students to understand the fundamental of CT. In this article we describe the CD-50BG CT instrument developed for experimental teaching at colleges. With 50 mm field-of-view and the transla- tion-rotation scanning mode

the system makes use of a single plastic scintillator + photomultiplier detector and a 137Cs radioactive source with 0.74 GBq activity

which is housed in a tungsten alloy shield. At the same time

an im- age processing software has been developed to process the acquired data

so that cross-sectional and 3D images can be reconstructed. High quality images with 1 lp·mm-1 spatial resolution and 1% contrast sensitivity are obtained. So far in China

more than ten institutions including Tsinghua University and Peking University have already applied the system to elementary teaching.

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Related Institution

Institute of Modern Physics, Chinese Academy of Sciences

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中国科学技术大学国家同步辐射实验室

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China ) 2

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