CT模体投影解析计算及其在射束硬化校正中的应用

汤少杰; 牟轩沁; 闫浩; 杨莹

您当前的位置：

首页 >

文章列表页 >

CT模体投影解析计算及其在射束硬化校正中的应用

专题研究 | 更新时间：2025-12-08

- CT模体投影解析计算及其在射束硬化校正中的应用
- Analytic Calculation of CT Phantom Projections and Its Application in Beam Hardening Correction
- 西安交通大学学报 2008年42卷第6期页码：664-668
- 作者机构：
  
  西安交通大学图像处理与模式识别研究所,西安,710049
- 作者简介：
- 基金信息：
  
  : 2007-10-25. 作者简介: 汤少杰(1975-),男,博士生;牟轩沁(联系人),男,教授,博士生导师. 基金项目: 国家自然科学基金资助项目(60551003,60472004);教育部新世纪优秀人才支持计划资助项目(NCET-05-0828)
- DOI：
  中图分类号： TP391.4
- 网络首发：2008-06-09，
  
  纸质出版：2008
- 稿件说明：
移动端阅览
汤少杰, 牟轩沁, 闫浩, 等. CT模体投影解析计算及其在射束硬化校正中的应用[J]. 西安交通大学学报, 2008,42(6):664-668.

汤少杰, 牟轩沁, 闫浩, et al. Analytic Calculation of CT Phantom Projections and Its Application in Beam Hardening Correction[J]. 2008, 42(6): 664-668.
汤少杰, 牟轩沁, 闫浩, 等. CT模体投影解析计算及其在射束硬化校正中的应用[J]. 西安交通大学学报, 2008,42(6):664-668. DOI：

汤少杰, 牟轩沁, 闫浩, et al. Analytic Calculation of CT Phantom Projections and Its Application in Beam Hardening Correction[J]. 2008, 42(6): 664-668. DOI：

摘要

为了开发出有效的医学诊断X射线CT(计算机断层扫描)射束硬化校正方法

结合X射线源能谱分布以及数学CT模体内各区域的几何形状和材料成分

提出一种宽能谱X射线投影解析计算方法.首先在仅考虑人体组织的前提下将CT值映射为材料成分

然后采用解析方法确定区域边界

最后根据X射线能谱分布计算投影数据.与线积分投影比较

该方法不但能够生成更真实的投影

而且能够为射束硬化校正与CT重建研究提供统一的投影数据.FORBILD头部模体实验结果表明

骨校正的骨区域CT值不一致误差比水校正的小4～5 Hu

比单能谱重建的大5～6 Hu.

Abstract

To develop an efficient beam hardening correction for medical diagnostic X-ray CT(computed tomography)

an analytic calculation method was proposed to simulate polychromatic X-ray projections. The method combines the energy spectrum distribution of X-ray source

geometrical shapes and material compositions of sub-regions of phantoms. Firstly

CT values are mapped into material compositions under the precondition that only human being tissues are considered. And then

boundaries of sub-regions are determined by the proposed analytic method. Finally

projections are calculated according to the energy spectrum distribution of X-ray source. Compared with the linear integral projecting

the proposed method can not only generate more realistic projections

but also provide a unified projection data for beam hardening correction and CT reconstruction. Experiments of FORBILD head phantom show that the CT-value inconsistency error of bone correction in bone region is lower than the water correction around 4-5Hu

but higher than the monochromatic reconstruction around 5-6Hu.

关键词

Keywords

references

秦中元,牟轩沁,王平,等.一种通用的X射线锥形束投影生成算法 [J]. 西安交通大学学报, 2002, 36(2): 160-164.

QIN Zhongyuan, MOU Xuanqin, WANG Ping, et al. Generalized algorithm for X-ray projections generation in cone-beam tomography [J]. Journal of Xi'an Jiaotong University, 2002, 36(2): 160-164.

汤少杰, 牟轩沁, 闫浩. 基于医学X射线成像物理模型的模体投影仿真计算 [J]. 西安交通大学学报, 2006, 40(8): 901-905.

TANG Shaojie, MOU Xuanqin, YAN Hao. Simulation calculation of phantom projections based on physics model of medical X-ray imaging [J]. Journal of Xi'an Jiaotong University, 2006, 40(8): 901-905.

TANG Shaojie, YU Hengyong, YAN Hao, et al. X-ray projection simulation based on physical imaging model [J]. Journal of X-ray Science and Technology, 2006, 14(3): 177-189.

MOU Xuanqin, TANG Shaojie, YU Hengyong. Comparison on beam hardening correction of CT-based HL consistency and normal water phantom experiment [DB/OL].(2006-07-07)[2007-08-01]. http:∥spiedigitallibrary. aip. org/getpdf/servlet/GetPDFSer- vlet?filetype=pdfid=PSIS/DG00631-800000163181V000001idtype=cvips.

MOU Xuanqin, TANG Shaojie, YU Hengyong. A beam hardening correction method with HL consistency [OB/OL](2006-07-07)[2007-08-01]. http:∥spiedigitallibrary. aip. org/getpdf/servlet/GetPDFSer- vlet?filetype=pdfid=PSISDG00631-8000001631181U000001idtype=cvips.

MCDAVID W D, WAGGENER R G, PAYNE W H, et al. Correction for spectral artifacts in cross-sectional reconstruction for X-rays [J]. Med Phys, 1977, 4(1): 54-57.

JOSEPH P M, SPITAL R D. A method for correcting bone induced artifacts in computed tomography scanners [J]. Journal of Computer Assisted Tomography, 1978, 2(1): 100-108.

KACHELRIEβ M, SOURBELLE K, KALENDER W A. Empirical cupping correction: a first-order raw data precorrection for cone-beam computed tomography [J]. Med Phys, 2006, 33(5): 1269-1274.

LAURITSCH G, BRUDER H. Head phantom [EB/OL].(1998-01-01)[2007-08-01]. http://www.imp.uni-erlangen.de/forbild/english/results/index.htm.

WILFRIED S, THOMAS B, WOLFGANG S. Correlation between CT numbers and tissue parameters needed for Monte Carlo simulations of clinical dose distributions [J]. Physics in Medicine and Biology, 2000, 45(2): 459-478.

National Institute of Standards and Technology, Physics Laboratory. XCOM: photon cross sections database [EB/OL].(1998-01-01)[2007-08-01]. http://physics.nist.gov/PhysRefData/Xcom/Text/XCOM.html.

BOONE J M, SEIBERT J A. An accurate method for computer-generating tungsten anode X-ray spectra from 30 to 140 keV [J]. Medical Physics, 1997, 24(11): 1661-1670.

WANG Ge, LIN Tein-Hsiang, CHENG Ping-Cin, et al. A general cone-beam reconstruction algorithm [J]. IEEE Transaction on Medical Imaging, 1993, 12(3): 486-496.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

扇贝仿生密封腔室内超临界二氧化碳泄漏流湍动能耗散机理研究

张角凹坑气膜孔对双层壁气膜冷却特性的影响

采用机器学习的大规模并行程序I/O性能建模与预测方法

不同板叠材料热声热机能量转换过程数值模拟研究

电子级超纯氮深冷空分流程节能优化研究