Myocardial stretch propagation measurement with focused and diverging beams: a feasibility and reproducibility study in healthy volunteers
2020 IEEE International Ultrasonics Symposium (IUS)(2020)
摘要
Left ventricular (LV) filling following atrial kick in late diastole generates LV myocardial stretch that propagates with a speed related to myocardial stiffness. Changes in myocardial stiffness have shown to be related to cardiac disease. Therefore, stretch propagation speed may detect pathologic myocardium. Our objective was two-fold. First, we wanted to compare the performance of ultrasound focused beams and diverging beams for the measurement of myocardial propagation speed: focused beams generate higher harmonics, therefore are expected to be less affected by clutter; but diverging beams enable a faster imaging sequence with less frame to frame decorrelation. Second, we wanted to evaluate the feasibility and reproducibility of both techniques in a group of healthy volunteers.
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关键词
Myocardial stiffness,interventricular septum,fast frame rate,diverging beams,focused beams
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