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Nonrigid Medical Image Registration by Finite-Element Deformable Sheet-Curve Models

机译:通过有限元可变形片状曲线模型进行非刚性医学图像配准

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摘要

Image-based change quantitation has been recognized as a promisingtool for accurate assessment of tumor's early response tochemoprevention in cancer research. For example, various changeson breast density and vascularity in glandular tissue are theindicators of early response to treatment. Accurate extraction ofglandular tissue from pre- and postcontrast magnetic resonance(MR) images requires a nonrigid registration of sequential MRimages embedded with local deformations. This paper reports anewly developed registration method that aligns MR breast imagesusing finite-element deformable sheet-curve models. Specifically,deformable curves are constructed to match the boundariesdynamically, while a deformable sheet of thin-plate splines isdesigned to model complex local deformations. The experimentalresults on both digital phantoms and real MR breast images usingthe new method have been compared to point-based thin-plate-spline(TPS) approach, and have demonstrated a significant and robustimprovement in both boundary alignment and local deformationrecovery.
机译:基于图像的变化定量已经被认为是在癌症研究中准确评估肿瘤对化学预防的早期反应的有前途的工具。例如,腺组织中乳房密度和血管的各种变化是对治疗早期反应的指标。从造影前和造影后(MR)图像中准确提取腺组织需要对嵌入局部变形的连续MR图像进行非刚性配准。本文报道了一种新开发的配准方法,该方法使用有限元可变形薄片曲线模型对齐MR乳房图像。具体而言,构建可变形曲线以动态匹配边界,同时设计可变形的薄板花键板来模拟复杂的局部变形。使用该新方法对数字体模和真实MR乳腺图像进行的实验结果已与基于点的薄板样条(TPS)方法进行了比较,并证明了边界对齐和局部变形恢复方面的显着而强大的改进。

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