Iso-shaping rigid bodies for estimating their motion from image sequences.
Iso-shaping rigid bodies for estimating their motion from image sequences.
复制标题
等形状刚体，用于根据图像序列估计其运动。
DOI：
10.1109/tmi.2003.819924
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Siegler,Sorin
中科院分区：
文献类型：
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作者：
Saha,PunamK;Udupa,JayaramK;Falcao,AlexandreX;Hirsch,BruceE;Siegler,Sorin
在许多医学成像应用中，由于成像设备的视场有限，所获取的图像通常仅包括结构的一部分。在这种情况下，不可能保证图像在不同扫描中包含完全相同的结构物理范围，这导致配准和许多其他任务（例如结构的形态、结构和运动学分析）中的困难。为了促进这种分析，我们开发了一种称为等成形的通用方法，它可以从分割的图像序列生成相同形状的结构。该方法的基础是在分割的部分解剖结构中自动找到一组称为形状中心的关键点，使得这些点存在于所有图像中并且它们代表对象中的相同物理位置，然后使用这些点作为参考来修剪结构。这里考虑的应用领域是根据在不同关节位置和负载条件下采集的磁共振图像来分析足部关节的形态、结构和运动学。通过四次评估实验，利用十个数据集对胫骨和腓骨进行等塑形，分析了该方法的准确性。分析表明，等值成形产生的结果正如理论框架所预测的那样。
In many medical imaging applications, due to the limited field of view of imaging devices, acquired images often include only a part of a structure. In such situations, it is impossible to guarantee that the images will contain exactly the same physical extent of the structure at different scans, which leads to difficulties in registration and in many other tasks, such as the analysis of the morphology, architecture, and kinematics of the structures. To facilitate such analysis, we developed a general method, referred to as iso-shaping, that generates structures of the same shape from segmented image sequences. The basis for this method is to automatically find a set of key points, called shape centers, in the segmented partial anatomic structure such that these points are present in all images and that they represent the same physical location in the object, and then trim the structure using these points as reference. The application area considered here is the analysis of the morphology, architecture, and kinematics of the joints of the foot from magnetic resonance images acquired at different joint positions and load conditions. The accuracy of the method is analyzed by utilizing ten data sets for iso-shaping the tibia and the fibula via four evaluative experiments. The analysis indicates that iso-shaping produces results as predicted by the theoretical framework.