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Title:: Carotidartery motion tracking based on ultra-high frame rate spatiotemporal ultrasound images

作者:: 马祎欣1; 杨雅博2; 徐胜军1; 贠卫国1△; 1.西安建筑科技大学信息与控制工程学院，西安 710311；2.西安交通大学生命科学与技术学院生物医学信息工程教育部重点实验室，西安 710049

Author(s):: MA Yixin1; YANG Yabo2; XU Shengjun1; YUN Weiguo1; 1.School of Information and Control Engineering, Xi′an University of Architecture and Technology, Xi′an 710311, China; 2. School of Life Science and Technology, Xi′an Jiaotong University, the Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi′an 710049

Keywords:: Vascular elasticity estimation; Carotid artery disease; Ultrasound imaging; Speckle tracking; Singular value decomposition; Noise suppression

摘要:: 本研究提出一种超声超高帧率时空滤波图像联合块匹配方法，以实现对颈动脉血管壁的运动追踪。超高帧率平面波超声图像以其高时间分辨率反映细节的运动信息。时空滤波方法滤除图像中相关性较低的随机噪声信号，从而使得联合块匹配算法中相关性的计算更加准确。通过对比，高帧率成像相对于低帧率反映出更加细致的运动信息，时空滤除处理减少了追踪结果的不平稳波动，由追踪结果测得受试者心率值接近真实值。改进结果表明，超声超高帧率时空滤波图像有望为颈动脉运动追踪提供一种更加有效的思路。

Abstract:: To realize the motion tracking of the carotid artery wall,we proposed an ultra-high frame rate of ultrasound imaging combined with spatiotemporal filtering and block matching method .Ultra-high frame rate plane wave ultrasound images reflected detailed motion information with their high temporal resolution. The spatiotemporal filtering method filtered out low-correlation random noise signals in the image, so that the correlation calculation in the block matching algorithm was more accurate. By comparison, high frame rate imaging reflected more detailed motion information than low frame rate. The spatiotemporal filtering process reduced the uneven fluctuation of the tracking result. The heart rate of the subject measured by the tracking result was close to the true value. The improved results show that the ultra-high frame rate spatiotemporal filtered image of ultrasound is expected to provide a more effective idea for carotid artery motion tracking.