中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (13): 2327-2330.doi: 10.3969/j.issn.1673-8225.2011.13.012

• 数字化骨科 digital orthopedics • 上一篇    下一篇

一种基于2D/3D配准的脊柱术中校正方法

曾  玲，余伟巍，席  平   

  1. 北京航空航天大学机械工程及自动化学院，北京市100191
  • 收稿日期:2010-10-11 修回日期:2011-02-16 出版日期:2011-03-26 发布日期:2013-10-23
  • 作者简介:曾玲，女，1986 生，湖南省长沙市人，汉族，北京航空航天大学在读本科，主要从事计算机辅助设计图像配准方面的研究。 zengling@me. buaa.edu.cn
  • 基金资助:

    云南省自然科学基金(2008-C-0013-R)，项目名称：以X线图像校正术前3D模型为核心的骨科手术模拟系统的研发。

A method of intra-operative spine fast correction based on 2D/3D registration

Zeng Ling, Yu Wei-wei, Xi Ping   

  1. School of Mechanical Engineering and Automation, Beihang University, Beijing  100191, China
  • Received:2010-10-11 Revised:2011-02-16 Online:2011-03-26 Published:2013-10-23
  • About author:Zeng Ling, School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
  • Supported by:

    the Natural Science Foundation of Yunnan Province, No. 2008-C-0013-R*

PDF

466

被引次数

4

摘要：

背景：脊柱术前三维影像有助于诊断和治疗，术中患者体位变化将引起脊柱形态改变，致使术前影像不能反映术中实际情况，无法确保手术的顺利实施。
目的：利用脊髓手术中影像校正术前脊柱模型形态。
方法：实验提出了一种基于2D/3D配准的脊柱术中校正方法，借助数字影像重建技术完成术前X射线图像与CT体数据的2D/3D配准，进一步完成术中、术前X射线图像中独立椎段的特征匹配，利用上述配准结果实现术前脊柱CT模型的术中快速校正。
结果与结论：采用附有标记的颈椎标本进行实验，校正后可基本消除术前脊柱模型与术中形态的偏差，其误差可控制在1 mm以内，能够满足医学临床要求。

关键词: 数字影像重建, 迭代最近点, 2D/3D配准, 术中校正, 模式搜索, 脊柱

Abstract:

BACKGROUND: The preoperative three-dimensional (3D) diagnosis and treatment. As patient’s posture changes, the intra-operative shape of spine is deferent form the preoperative. So the preoperative images can not reflect the intra-operative situation. And doctor can not ensure the smooth implementation of the operation.
OBJECTIVE: To correct preoperative spine models using intra-operative image.
METHODS: This paper presented an approach based on 2D/3D registration to correct preoperative images during operation. We use digitally reconstructed radiograph (DRR) to register CT to X-ray image. Then complete the feature registrations of all independent vertebra segments between intra-operative and preoperative X-ray images. The results of above registrations are exploited to fast correct the preoperative spine models.
RESULTS AND CONCLUSION: Using marked cervical spine specimens for experiment, the deviation of the spine model can be basically eliminated after correction. The error between intra-operative and corrected preoperative spine model is less than 1mm. And clinical requirements can be met.

中图分类号: