[1]贾富仓,李修往,陈思平.CT图像引导脊柱外科配准方法研究[J].深圳大学学报理工版,2007,24(4):406-409.
 JIA Fu-cang,LI Xiu-wang,and CHEN Si-ping.Registration for CT image guided spine surgery[J].Journal of Shenzhen University Science and Engineering,2007,24(4):406-409.
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CT图像引导脊柱外科配准方法研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第24卷
期数:
2007年4期
页码:
406-409
栏目:
出版日期:
2007-10-30

文章信息/Info

Title:
Registration for CT image guided spine surgery
文章编号:
1000-2618(2007)04-0406-04
作者:
贾富仓12李修往2陈思平13
1)浙江大学生物医学工程与仪器科学学院,杭州 310027;
2)深圳安科高技术股份有限公司,深圳 518067;
3)深圳大学信息工程学院,深圳 518060
Author(s):
JIA Fu-cang12LI Xiu-wang2and CHEN Si-ping13
1)College of Biomedical Engineering and Instrument Science,Zhejiang University,Hangzhou 310027,P.R.China
2)Shenzhen Anke High-tech Co Ltd,Shenzhen 518067,P.R.China
3)College of Information Engineering,Shenzhen University,Shenzhen 518060,P.R.China
关键词:
图像配准迭代最近点共线性距离图图像引导脊柱外科
Keywords:
image registrationiterative closest pointcollinear testdistance mapimage guided spine surgery
分类号:
TP 391.41;R 319
文献标志码:
A
摘要:

提出一种用于CT图像引导脊柱外科系统中,把患者物理坐标系和术前CT图像坐标系进行精确配准的方法. 根据临床实际情况,在不依赖激光定位系统的条件下,先从图像和脊椎骨上选择三对对应点配准,得到一个初始稳定解;再通过阈值分割得到脊椎骨的表面点云,在初始解基础上,从脊椎骨表面选取更多点进行迭代最近点优化.应用共线性避免选点带来的初始配准误差,保证配准的可靠性,通过线性距离图提高配准速度. 实验结果表明,该方法可在低成本条件下,实现精确便捷配准.

Abstract:

A method was presented for accurate registration between patient coordinate system and CT image coordinate system in CT image guided spine surgery. In a clinical environment without laser localizer, first a corresponding point-pairs landmark registration was used as an initial stable solution from the three point-pairs chosen from the CT image and their corresponding vertebra. Then the threshold method was used to extract the surface point of vertebra. Finally the registration was refined from coarse to fine level with more points chosen from outer surface of vertebra based on iterative closest point principle. A collinear test was used to reduce initial registration error due to initial mischosen points. A distance map was introduced to speed up the registration. An experiment shows that the registration can be implemented accurately, conveniently and quickly in a cost-effective way.

参考文献/References:

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[2]Sugano N.Computer-assisted orthopedic surgery[J].Journal of Orthopaedic Science,2003,8(3):442-448.
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相似文献/References:

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备注/Memo

备注/Memo:

收稿日期:2007-04-03修回日期:2007-06-18
基金项目:粤港重点领域突破资助项目(2005A11304003)
作者简介:贾富仓(1976-),男(汉族),河北省河间市人,浙江大学与安科公司企业博士后研究人员.E-mail:jiafucang@anketech.com
通讯作者:陈思平(1948-),男(汉族),深圳大学研究员、博士生导师.E-mail:chensiping@szu.edu.cn

更新日期/Last Update: 2007-12-05