【摘要】 由带标记的心脏核共振图像(TaggedMRI)分割所得结果,在空间上恢复整个左心室(LV)的形状和在时间上重建整个左心室的运动以重现整个左心室的应变情况,是当前心脏研究的热点。对TaggedMRI分割所得结果中的网格交点进行了定义和编码,并设计实现了心脏模拟算法。模拟器可根据描述心脏运动的13个k参数,用迭代计算精确求解出左心室中任一心肌质点随时间前向或反向运动的轨迹,从而模拟TaggedMRI在各影像平面采样和分割所得到的心肌质点的4-D精确坐标。模拟结果以4-D坐标数据和3-D可视化形式输出。LV模拟器为左心室运动重建研究提供了各种测试数据,是研究工作的重要基础工具。更多还原

【Abstract】 The segmentation results of tagged cardiac magnetic resonance image(tagged MRI)could be used for shape-recovery,motion-reconstruction and strain analysis of Left Ventricle(LV).It is one of the most important tasks to research cardiac motion.The grid points,which could be acquired from tagged MRI,were defined and coded,and the algorithm of heart simulation and LV simulator was designed and realized.Using iterative methods,LV simulator could accurately track any material point in forward or inverse motion governed by thirteen k-parameters that are presupposed to cardiac motion,and all image planes can be sampled at any time.The simulated results are provided with 4-D coordinates and served as the basic data for LV motion reconstruction,thus,the LV simulator is generated based on these data for 3-D visualization of LV.更多还原