乳腺DCE-MRI增强场时间序列和组织形变场的联合估计

doi:10.3969/j.issn.0372-2112.2014.08.008

电子学报 ›› 2014, Vol. 42 ›› Issue (8): 1509-1514.DOI: 10.3969/j.issn.0372-2112.2014.08.008

乳腺DCE-MRI增强场时间序列和组织形变场的联合估计

余丽玲, 阳维, 卢振泰, 冯前进, 陈武凡

南方医科大学生物医学工程学院, 广东广州 510515

收稿日期:2013-07-18 修回日期:2013-11-19 出版日期:2014-08-25
- 通讯作者:
- 阳维
- 作者简介:
- 余丽玲女，1988年出生，广东韶关人.南方医科大学硕士研究生，研究方向为医学图像分析.E-mail：lilingyu124@126.com
- 基金资助:
- 国家自然科学青年基金 (No.81101109）; 国家973重点基础研究发展计划 (No.2010CB732505）

Joint Estimation of Enhancement Field Sequence and Deformation Field of Breast DCE-MRI

YU Li-ling, YANG Wei, LU Zhen-tai, FENG Qian-jin, CHEN Wu-fan

School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515, China

Received:2013-07-18 Revised:2013-11-19 Online:2014-08-25 Published:2014-08-25
- Supported by:
- Youth Fund of National Natural Science Foundation of China (No.81101109); National Program on Key Basic Research Project of China (973 Program) (No.2010CB732505)

摘要/Abstract

摘要：

乳腺DCE-MRI扫描过程中，病人运动等会使图像序列产生运动伪影，需要对DCE-MRI时间序列图像进行运动补偿，消除运动伪影的影响.为充分利用数据信息和增强在空间和时间上的先验信息，本文提出了联合估计增强场时间序列和组织形变场的贝叶斯框架.采用离散马尔科夫随机场模型分别对增强场时间序列和组织形变场进行建模和添加平滑约束，并通过分步迭代方式进行估计.利用估计的增强场对DCE-MRI时间序列图像进行“去增强”处理后，可将增强时间序列图像视为同一模态图像进行配准.实验结果表明，本文方法可准确估计增强场时间序列，并可达到较高的配准精度.

关键词: 乳腺肿瘤, 动态增强磁共振, 图像配准, 马尔科夫随机场

Abstract:

Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) suffer artifact by patient motion during the imaging procedure.It is necessary to correct patient motion by deformation registration for DCE-MRI.We present a MAP framework of joint estimation of the enhancement field sequence and the deformation field,which can make use of the prior knowledge of enhancement in space-time.The enhancement field sequence and the deformation field are modeled by the MRF models with the smoothness constraints,and are estimated by a two-step alternate optimization algorithm.In the alternate optimization procedure,the estimated enhancement field sequence is used to de-enhance the post-contrast images.Thus,the pre-contrast and post-contrast images can be considered as the same modal image for registration and it make the estimation of deformation field easier.The experimental results show that the proposed method can estimate the enhancement field sequence accurately and provides high registration accuracy.

Key words: breast tumor, DCE-MRI, image registration, markov random field model

中图分类号:

TP391

余丽玲, 阳维, 卢振泰, 等. 乳腺DCE-MRI增强场时间序列和组织形变场的联合估计[J]. 电子学报, 2014, 42(8): 1509-1514.

YU Li-ling, YANG Wei, LU Zhen-tai, et al. Joint Estimation of Enhancement Field Sequence and Deformation Field of Breast DCE-MRI[J]. Acta Electronica Sinica, 2014, 42(8): 1509-1514.

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乳腺DCE-MRI增强场时间序列和组织形变场的联合估计

Joint Estimation of Enhancement Field Sequence and Deformation Field of Breast DCE-MRI

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