文献类型：期刊文献

英文题名：An optimized optical-flow-based method for quantitative tracking of ultrasound-guided right diaphragm deformation

作者：Zhang, Qi[1];Yang, Dawei[2,3];Zhu, Yu[1,3];Liu, Yatong[1];Ye, Xiong[4]

机构：[1]East China Univ Sci & Technol, Sch Informat Sci & Engn, Shanghai 200237, Peoples R China;[2]Fudan Univ, Zhongshan Hosp, Dept Pulm & Crit Care Med, Shanghai 200032, Peoples R China;[3]Shanghai Engn Res Ctr Internet Things Resp Med, Shanghai 200237, Peoples R China;[4]Shanghai Univ Med & Hlth Sci, Sch Clin Med, Shanghai 201318, Peoples R China

年份：2023

卷号：23

期号：1

外文期刊名：BMC MEDICAL IMAGING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001049480700001)】；

语种：英文

外文关键词：Diaphragm; Optical flow; Ultrasound; Strain; Deformation

摘要：ObjectivesTo develop a quantitative analysis method for right diaphragm deformation. This method is based on optical flow and applied to diaphragm ultrasound imaging.MethodsThis study enrolls six healthy subjects and eight patients under mechanical ventilation. Dynamic images with 3-5 breathing cycles were acquired from three directions of right diaphragm by a portable ultrasound system. Filtering and density clustering algorithms are used for denoising Digital Imaging and Communications in Medicine (DICOM) data. An optical flow based method is applied to track movements of the right diaphragm. An improved drift correction algorithm is used to optimize the results. The method can automatically analyze the respiratory cycle, inter-frame/cumulative vertical and horizontal displacements, and strain of the input right diaphragm ultrasound image.ResultsThe optical-flow-based diaphragm ultrasound image motion tracking algorithm can accurately track the right diaphragm during respiratory motion. There are significant differences in horizontal and vertical displacements in each section (p-values < 0.05 for all). Significant differences are found between healthy subjects and mechanical ventilation patients for both horizontal and vertical displacements in Section III (p-values < 0.05 for both). There is no significant difference in global strain in each section between healthy subjects and mechanical ventilation patients (p-values > 0.05 for all).ConclusionsThe developed method can quantitatively evaluate the inter-frame/cumulative displacement of the diaphragm in both horizontal and vertical directions, as well as the global strain in three different imaging planes. The above indicators can be used to evaluate diaphragmatic dynamics.