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2. 发明授权

US06458084B2 Ultrasonic diagnosis apparatus 有权
标题翻译：超声诊断仪
公开(公告)号：US06458084B2
公开(公告)日：2002-10-01
申请号：US09785110
申请日：2001-02-16
申请人： Jing-Wen Tsao , Kenji Kumasaki , Takashi Itoh , Tatsuya Wakamatsu
发明人： Jing-Wen Tsao , Kenji Kumasaki , Takashi Itoh , Tatsuya Wakamatsu
IPC分类号： A61B800
CPC分类号： G01S15/8952 , G01S7/52038 , G01S7/5205 , G01S15/8959
摘要： In an ultrasonic diagnosis apparatus, a first transmission signal including both of two fundamentals of frequencies f0 and 2f0 is transmitted, and then a second transmission signal having a polarity reverse that of the first transmission signal is transmitted. A receiving beam processor 22 generates a signal in which the echoes of the two transmission signals are added, and a signal in which the echoes are subtracted. The fundamental components are canceled out by addition and a secondary harmonic component A2 generated by the non-linear interaction remains in the sum signal. In the subtraction signal, the fundamental component remains while the secondary harmonic component is canceled out by subtraction. The fundamental component AII of the frequency 2f0 is extracted from the subtraction signal, and a ratio (A2/AII) is calculated by a divider 44. A differentiating process is then executed by an HPF 46 to obtain the evaluation value reflecting the non-linear parameter at each depth of the body.
摘要翻译：在超声波诊断装置中，发送包括频率f0和2f0的两个基本原理的第一发送信号，然后发送具有与第一发送信号的极性相反的极性的第二发送信号。接收波束处理器22产生相加两个发送信号的回波的信号，并且减去回波的信号。通过加法抵消基本分量，并且通过非线性相互作用产生的二次谐波分量A2保留在和信号中。在减法信号中，通过减法将二次谐波分量抵消，基本分量残留。从减法信号中提取频率2f0的基本分量AII，并通过除法器44计算出比率（A2 / AII）。然后由HPF 46执行微分处理，以获得反映非线性的评估值参数在身体的每个深度。

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