标题：Measurement of left ventricular torsion using block-matching-based speckle tracking for two-dimensional echocardiography
作者：Sun, Feng-Rong; Wang, Xiao-Jing; Wu, Qiang; Yao, Gui-Hua; Zhang, Yun
作者机构：[Sun, Feng-Rong; Wu, Qiang] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China.; [Wang, Xiao-Jing] Toshiba China Co Ltd, Ctr Res 更多
通讯作者地址：[Sun, FR]Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China.
来源：JOURNAL OF ELECTRONIC IMAGING
摘要：Left ventricular (LV) torsion is a sensitive and global index of LV systolic and diastolic function, but how to noninvasively measure it is challenging. Two-dimensional echocardiography and the block-matching based speckle tracking method were used to measure LV torsion. Main advantages of the proposed method over the previous ones are summarized as follows: (1) The method is automatic, except for manually selecting some endocardium points on the end-diastolic frame in initialization step. (2) The diamond search strategy is applied, with a spatial smoothness constraint introduced into the sum of absolute differences matching criterion; and the reference frame during the search is determined adaptively. (3) The method is capable of removing abnormal measurement data automatically. The proposed method was validated against that using Doppler tissue imaging and some preliminary clinical experimental studies were presented to illustrate clinical values of the proposed method. (C) 2013 SPIE and IS&T [DOI: 10.1117/1.JEI.22.1.013010]