Spatio-temporal tracking of myocardial deformations with a 4-D B-spline model from tagged MRI
Spatio-temporal tracking of myocardial deformations with a 4-D B-spline model from tagged MRI
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DOI：
10.1109/42.811299
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发表时间：
1999-10-01
影响因子：
10.6
通讯作者：
Amini, AA
中科院分区：
文献类型：
--
作者：
Huang, JT;Abendschein, D;Amini, AA
从标记的磁共振成像（MRI）中准确描绘心脏的左心室（LV）的体积运动是一个重要的研究领域。我们已经建立了一个系统，提取标记线的功能，从短轴（SA）和长轴（LA）的图像序列作为输入，并适合一个四维（4-D）随时间变化的B样条模型的数据，同时通过匹配三个序列的固体结平面的LV标记平面4-D跟踪模型结固体MRI帧。该模型的重要优点是，标签表面的重建，三维（3-D）材料点定位，以及位移重建都在一个单一的步骤中实现。所产生的3-D位移场与心脏运动模拟器进行验证，和3-D运动场捕获在体内变形的猪模型与后外侧心肌梗死的说明。
Accurate delineation of the volumetric motion of the left ventricle (LV) of the heart from tagged magnetic resonance imaging (MRI) is an important area of research. We have built a system that takes extracted tag line features from short axis (SA) and long axis (LA) image sequences as input and fits a four-dimensional (4-D) time-varying B-spline model to the data by simultaneously fitting the model knot solids to MRI frames via matching three sequences of solid knot planes to the LV tag planes for 4-D tracking. Important advantages of the model are that reconstruction of tag surfaces, three-dimensional (3-D) material point localization, as well as displacement reconstruction are all achieved in a single step. The generated 3-D displacement fields are validated with a cardiac motion simulator, and 3-D motion fields capturing in vivo deformations in a porcine model with posterolateral myocardial infarction are illustrated.