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METHOD FOR DETECTING FIRST ARRIVAL PULSE IN ULTRASOUND TRANSMISSION COMPUTED TOMOGRAPHY USING WINDOWED NONLINEAR ENERGY OPERATOR
METHOD FOR DETECTING FIRST ARRIVAL PULSE IN ULTRASOUND TRANSMISSION COMPUTED TOMOGRAPHY USING WINDOWED NONLINEAR ENERGY OPERATOR
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机译:窗式非线性能量算子在超声透射计算机断层成像中第一到达脉冲的检测方法
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摘要
PURPOSE: A method for detecting the first arrival pulse in an ultrasound transmission computed tomography using a windowed nonlinear energy operator is provided to present the excellent detection rate in terms of accuracy and operation speed by coupling a window function to a nonlinear energy operator so as to be suitable for the situation of ultrasound transmission computed tomography. CONSTITUTION: A method for detecting the first arrival pulse in an ultrasound transmission computed tomography comprises the steps of: obtaining the electric pulse sequence of arrived ultrasonic signal by penetrating an object(S21); calculating a nonlinear energy operator based on the obtained electric pulse sequence(S22); calculating a windowed nonlinear energy operator by convoluting a window function to the calculated nonlinear energy operator(S23); and detecting the first arrival pulse by applying a threshold operator to the windowed calculated nonlinear energy operator(S24). [Reference numerals] (S21) Obtaining the electric pulse sequence of arrived ultrasonic signal by penetrating an object; (S22) Calculating a nonlinear energy operator based on the obtained electric pulse sequence; (S23) Calculating a windowed nonlinear energy operator by convoluting a window function to the calculated nonlinear energy operator; (S24) Detecting the first arrival pulse by applying a threshold operator to the windowed calculated nonlinear energy operator
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