3D Hermite Transform Optical Flow Estimation in Left Ventricle CT Sequences
3D Hermite Transform Optical Flow Estimation in Left Ventricle CT Sequences
复制标题
左心室 CT 序列中的 3D Hermite 变换光流估计
DOI：
10.3390/s20030595
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
E. Vallejo
中科院分区：
文献类型：
--
作者：
Carlos Mira;E. Moya;B. Escalante;Jimena Olveres;J. Brieva;E. Vallejo
心脏病是世界上最重要的死亡原因，多年来，心脏运动的研究主要是在二维空间中进行的，然而，重要的是要考虑到心脏运动引起的变形是在三维空间中发生的。3D+t分析可以描述心脏的大部分运动，例如，在每个心跳周期中发生的扭曲运动，使我们能够识别心脏壁的异常。因此，有必要开发算法来帮助专家了解心脏运动。在这项工作中，我们开发了一种使用微分光流方法确定三维心脏运动的新方法，其中我们使用导向Hermite变换（SHT），该变换允许我们分解心脏体积，利用它作为人类视觉系统（HVS）的模型。我们的建议在完整的心脏计算机断层扫描（CT）体积（3D+t）及其各自的左心室分割中进行了测试。测试了该方法对噪声的鲁棒性，取得了良好的效果。通过转发重构时的误差对结果进行评价，从t时刻的体积到t+1时刻使用得到的光流（插值误差）。这些参数进行了广泛的调整。在二维算法的情况下，插值误差和归一化插值误差非常接近，低于地面真值流报告的值。对于3D算法，将结果与另一种类似方法在3D中进行比较，插值误差保持在0.1以下。这些结果的插值误差为完整的心脏容量和左心室显示为清晰的图形。最后，通过三维光流的表示，观察到一系列左心室收缩和扩张的特征。
Heart diseases are the most important causes of death in the world and over the years, the study of cardiac movement has been carried out mainly in two dimensions, however, it is important to consider that the deformations due to the movement of the heart occur in a three-dimensional space. The 3D+t analysis allows to describe most of the motions of the heart, for example, the twisting motion that takes place on every beat cycle that allows us identifying abnormalities of the heart walls. Therefore, it is necessary to develop algorithms that help specialists understand the cardiac movement. In this work, we developed a new approach to determine the cardiac movement in three dimensions using a differential optical flow approach in which we use the steered Hermite transform (SHT) which allows us to decompose cardiac volumes taking advantage of it as a model of the human vision system (HVS). Our proposal was tested in complete cardiac computed tomography (CT) volumes ( 3D+t), as well as its respective left ventricular segmentation. The robustness to noise was tested with good results. The evaluation of the results was carried out through errors in forwarding reconstruction, from the volume at time t to time t+1 using the optical flow obtained (interpolation errors). The parameters were tuned extensively. In the case of the 2D algorithm, the interpolation errors and normalized interpolation errors are very close and below the values reported in ground truth flows. In the case of the 3D algorithm, the results were compared with another similar method in 3D and the interpolation errors remained below 0.1. These results of interpolation errors for complete cardiac volumes and the left ventricle are shown graphically for clarity. Finally, a series of graphs are observed where the characteristic of contraction and dilation of the left ventricle is evident through the representation of the 3D optical flow.
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DOI：
10.1016/j.patcog.2020.107759
发表时间：
2018-05
期刊：
ArXiv
影响因子：
--
作者：
Francisco Barranco;C. Fermüller;Y. Aloimonos;E. Ros
通讯作者：
Francisco Barranco;C. Fermüller;Y. Aloimonos;E. Ros
影响因子：
39.2
作者：
KOREN, MJ;DEVEREUX, RB;LARAGH, JH
通讯作者：
LARAGH, JH
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DOI：
10.1007/978-1-4939-7647-8_1
发表时间：
2018
期刊：
Neuromethods
影响因子：
--
作者：
Joshi,AnandA
通讯作者：
Joshi,AnandA
影响因子：
4.6
作者：
Ha, In Young;Wilms, Matthias;Heinrich, Mattias P.
通讯作者：
Heinrich, Mattias P.