X射线发光断层成像中笔束与锥束激发性能的对比

张海波; 耿国华; 易黄建; 贾涛; 贺小伟

doi:10.3788/OPE.20162405.0986

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X射线发光断层成像中笔束与锥束激发性能的对比

现代应用光学 | 更新时间：2020-08-13

- X射线发光断层成像中笔束与锥束激发性能的对比
- Comparison between pencil-beam and cone-beam in XLCT system
- 光学精密工程 2016年24卷第5期页码：986-992
- 作者机构：
  
  西北大学信息科学与技术学院,陕西西安,710127
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.61372046,No.61172170,No.11571012)();陕西省科技计划资助项目(No.2013K12-20-12,No.
- DOI：10.3788/OPE.20162405.0986
  中图分类号： Q-333;R814.42
- 收稿日期：2015-12-24，
  
  修回日期：2016-02-07，
  
  纸质出版日期：2016-05-25
- 稿件说明：
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张海波, 耿国华, 易黄建等. X射线发光断层成像中笔束与锥束激发性能的对比[J]. 光学精密工程, 2016,24(5): 986-992

ZHANG Hai-bo, GENG Guo-hua, YI Huang-jian etc. Comparison between pencil-beam and cone-beam in XLCT system[J]. Editorial Office of Optics and Precision Engineering, 2016,24(5): 986-992
张海波, 耿国华, 易黄建等. X射线发光断层成像中笔束与锥束激发性能的对比[J]. 光学精密工程, 2016,24(5): 986-992 DOI： 10.3788/OPE.20162405.0986.

ZHANG Hai-bo, GENG Guo-hua, YI Huang-jian etc. Comparison between pencil-beam and cone-beam in XLCT system[J]. Editorial Office of Optics and Precision Engineering, 2016,24(5): 986-992 DOI： 10.3788/OPE.20162405.0986.

摘要

研究了X射线发光断层成像(XLCT)的激发性能

对笔束XLCT和锥束XLCT等两种主要的成像系统在不同激发方式下的扫描时间、重建精度、分辨率及重建时间等性能指标进行了对比研究。设计的对比实验中

笔束XLCT系统的扫描时间为436 s

锥束XLCT系统的扫描时间仅为10 s。目标实验中

笔束XLCT系统的重建时间为82.57 s

重建误差为0.47 mm;锥束XLCT系统的重建时间为172.63 s

重建误差为1.59 mm。在边距分别为1 mm和0.5 mm的两组双目标实验中

笔束XLCT系统均能准确分辨

重建误差均在0.8 mm以内

而锥束XLCT系统对边距为1 mm的双目标重建误差均达到了1.7 mm左右;当目标边距缩小到0.5 mm时

其已无法进行全域分辨。实验结果表明:相比于锥束XLCT

笔束XLCT利用自身的"激发先验"优势具有较短的重建时间、较高的定位能力和分辨率

但是其系统扫描时间要明显大于锥束XLCT。本文的工作为选择合适的XLCT成像系统提供了参考。

Abstract

The excitation characteristics of X-ray Luminescence Computed Tomography (XLCT) was researched. Two kinds of imaging systems for pencil-beam XLCT and cone-beam XLCT were introduced and their respective performance indexes such as the excitation schemes

scanning costs

reconstruction efficiency

spatial resolving capacity and reconstruction costs were compared and analyzed in detail. The comparison experiment shows that the scanning time of pencil-beam XLCT is 436 s but that of the cone-beam XLCT is only 10 s. In the experiment for a single target

the reconstruction time and location error of pencil-beam XLCT are 82.57 s and 0.47 mm

and those of the cone-beam XLCT are 172.63 s and 1.59 mm

respectively. In the two group experiments for double targets with edge distances of 1 mm and 0.5 mm respectively

the pencil-beam XLCT can accurately distinguish all targets with a reconstruction error less than 0.8 mm; however

the reconstruction error of the cone-beam XLCT reaches to 1.7 mm for the double targets with the edge distance of 1 mm and can not distinguish the targets at the edge distance to be reduced to 0.5 mm. Experimental results demonstrate that compared with the cone-beam XLCT

the pencil-beam XLCT has better performance in reconstruction time

location accuracy and spatial resolving due to its "excitation priors"

but has obviously poor capability on the system scanning. This paper provides a valuable reference for researchers on the selection of appropriate XLCT systems.

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