Oblique 3D MRI tags for the estimation of true 3D cardiac motion parameters
Oblique 3D MRI tags for the estimation of true 3D cardiac motion parameters
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DOI：
10.1007/s10554-010-9646-8
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发表时间：
2010-12-01
影响因子：
2.1
通讯作者：
Matsuda, Tetsuya
中科院分区：
文献类型：
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作者：
Shimizu, Yu;Amano, Akira;Matsuda, Tetsuya
本研究的目的是展示倾斜 3D 标签在心脏磁共振成像 (MRI) 中的优势以及准确描述心肌壁复杂运动的潜力。 3D 心脏电影数据密集地标记有 3D 倾斜标签。后者是使用 Gabor 分析和主动几何形状进行跟踪的。根据标签交叉点，在全局和详细的局部级别上评估常见的 2D 参数，例如长轴缩短、径向缩短和旋转。最后，使用相同的数据来估计左心室容量变化和心肌应力/应变。我们已成功跟踪密集的 3D 标签并在详细的局部级别上评估常见参数。此外，还可以估计固有的 3D 参数。全局运动数据与之前发布的数据一致。倾斜标签允许在所有 MRI 切片和任何时间范围内明确定位标签平面。与 HARP 相比，我们的标签跟踪方法允许跟踪标签，即使标签很密集。可以更详细地提取运动参数。此外，密集的倾斜 3D 标签的交叉点为心脏的有限元模型提供了自然的基础。可以直接访问心脏运动的 3D 特征。
Aim of this study is to demonstrate the advantages of oblique 3D tags in cardiac magnetic resonance imaging (MRI) and the potential to accurately describe the complex motion of the myocardial wall. 3D cardiac Cine data were densely tagged with 3D oblique tags. The latter were tracked using Gabor analysis and active geometries. From the tag intersections, common 2D parameters such as long axis shortening, radial shortening and rotation were evaluated on a global as well as detailed local level. Finally, the same data were used to estimate left ventricular volume change and myocardial stress/strain. We have successfully tracked dense 3D tags and evaluated common parameters on a detailed local level. In addition, inherently 3D parameters could be estimated. Global motion data are in accordance with previously published data. Oblique tags allow for unambiguous localization of the tag plane in all MRI slices and in any time frame. In contrast to HARP, our tag tracking methodology allows for tracking of the tags even when they are dense. Motion parameters can be extracted in greater detail. Moreover, the intersections of dense oblique 3D tags provide a natural basis for a finite element model of the heart. Straight forward access to the 3D characteristics of the cardiac motion is provided.