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1. 发明授权

US4707813A Ultrasound apparatus permitting dynamic variation of the position of the reception focus 失效
标题翻译：超声波设备允许接收焦点位置的动态变化
公开(公告)号：US4707813A
公开(公告)日：1987-11-17
申请号：US929736
申请日：1986-11-12
申请人： Reiner Moeller , Gert Hetzel , Ulrich Saugeon , Gustav Boheim , Viktor Zurinski
发明人： Reiner Moeller , Gert Hetzel , Ulrich Saugeon , Gustav Boheim , Viktor Zurinski
IPC分类号： G01N29/26 , A61B8/00 , G01N29/04 , G01N29/44 , G01S7/52 , G01S15/89 , G10K11/34 , H04R3/00 , G01S9/68
CPC分类号： G01S7/52046 , G01S15/8918 , G01S7/52033 , G10K11/345
摘要： An ultrasound apparatus permitting dynamic variation of the position of the reception focus of a prescribable number of ultrasound transducer elements has a reception channel including a time-delay circuit for the received ultrasound echo signal following every ultrasound transducer element. For switching between different, prescribed time-delay values (T.sub.1, T.sub.2, . . . T.sub.n), the time-delay circuit is connected to a control device. A part of the time-delay circuit is redundantly designed, so that first and a second sub-circuits for forming the time-delayed ultrasound echo signal are present. A dissolve circuit is provided which causes the second sub-circuit to be faded in the reception channel when the first sub-circuit, in a blanked condition, is switched to a different time-delay value (T.sub.1, T.sub.2, . . . T.sub.n), and vice versa, by a control device. Significant time is thus saved when switching between the different focus positions of the ultrasound apparatus. Transmission of switching clicks onto the respectively activated sub-circuit is prevented by the use of isolating amplifiers.
摘要翻译：允许动态变化可规定数量的超声波换能器元件的接收焦点位置的超声波装置具有接收通道，该接收通道包括每个超声换能器元件之后的所接收的超声回波信号的延时电路。为了在不同的规定时间延迟值（T1，T2 ... Tn）之间切换，延时电路连接到控制装置。时间延迟电路的一部分被冗余地设计，使得存在用于形成时间延迟的超声回波信号的第一和第二子电路。提供一种溶解电路，当处于消隐状态的第一子电路被切换到不同的延时值（T1，T2 ... Tn）时，使第二子电路在接收通道中褪色，，反之亦然，由控制装置。因此，在超声波装置的不同焦点位置之间切换时，节省了大量时间。通过使用隔离放大器来防止切换点击到分别激活的子电路的传输。

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