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1. 发明授权

US4573477A Ultrasonic diagnostic apparatus 失效
标题翻译：超声波诊断仪
公开(公告)号：US4573477A
公开(公告)日：1986-03-04
申请号：US487147
申请日：1983-04-21
申请人： Koroku Namekawa , Akira Koyano , Chihiro Kasai
发明人： Koroku Namekawa , Akira Koyano , Chihiro Kasai
IPC分类号： A61B8/00 , A61B8/06 , G01P5/24 , G01S15/58 , G01S15/89 , A61B10/00
CPC分类号： G01S15/8988 , A61B8/06 , G01P5/244 , G01S15/582 , G01S15/8977 , G01S15/8979
摘要： An ultrasonic diagnostic apparatus for accurately displaying the velocity distribution of moving members within a living organism. The apparatus constitutes an improvement on the ultrasonic diagnostic apparatus of the type wherein an ultrasonic pulse beam is repeatedly transmitted into the living organism at a fixed pulse rate and the reflected echoes are picked up, amplified and displayed, wherein the improvement comprises a complex signal converter for converting a received high frequency signal into complex signals by mixing the received high frequency signal with a pair of complex reference signals which have frequencies that are integer multiples of the pulse rate and which are complexly related to one another, an autocorrelator for determining the autocorrelation of the complex signals, the autocorrelator having a delay time equal to an integer multiple of the pulse period, and a velocity determination circuit for determining the velocity through said autocorrelation. The apparatus is capable of measuring the velocity distribution of moving members within the organism and of rapidly displaying the measured results in real time.
摘要翻译：一种用于精确地显示活体内的移动部件的速度分布的超声波诊断装置。该装置构成对超声波诊断装置的改进，其中超声波脉冲束以固定的脉冲速度重复地传输到生物体中，并且反射回波被拾取，放大和显示，其中改进包括复信号转换器用于通过将接收的高频信号与具有脉冲频率的整数倍的频率并且彼此复杂相关的频率的一对复参考信号混合来将接收到的高频信号转换成复信号，用于确定自相关的自相关器所述自相关器具有等于所述脉冲周期的整数倍的延迟时间，以及速度确定电路，用于确定通过所述自相关的速度。该装置能够测量生物体内移动构件的速度分布，并实时快速显示测量结果。

2. 发明授权

US4641668A Ultrasonic blood flow imaging method and apparatus 失效
标题翻译：超声波血流成像方法及装置
公开(公告)号：US4641668A
公开(公告)日：1987-02-10
申请号：US767148
申请日：1985-08-19
申请人： Koroku Namekawa
发明人： Koroku Namekawa
IPC分类号： A61B8/00 , A61B8/06 , G01H3/00 , G01N29/06 , G01N29/44 , G01S7/52 , G01S7/539 , G01S15/89 , A61B10/00
CPC分类号： G01S15/8979 , A61B8/06 , G01N29/0609 , G01S7/52071
摘要： An ultrasonic blood flow imaging method for two-dimensionally displaying the velocity distribution of blood flow within a body to be examined is characterized in that the velocity distribution is displayed as a color picture in which the velocity direction is represented by one color when positive and by another different color when negative, and the magnitude of the velocity is represented by varying the brightness of the color concerned. An ultrasonic imaging apparatus for carrying out this method comprises an ultrasonic transmitter/receiver which outputs a tomographic image signal corresponding to a specific region of an object, and an average velocity signal and a velocity deviation signal corresponding to the velocity of blood flow within the specified region. These signals are stored in respective frame memories and then processed by a color processor to produce a color video signal which is input to a color display for displaying a tomographic image, and the velocity and velocity deviation of the blood flow.
摘要翻译：用于二维地显示待检体内的血流速度分布的超声波血流成像方法的特征在于，速度分布被显示为彩色图像，其中速度方向由正值表示为一种颜色，并且通过另一种不同的颜色当为负时，速度的大小通过改变相关颜色的亮度来表示。用于执行该方法的超声波成像装置包括：超声波发送器/接收器，其输出与物体的特定区域对应的断层图像信号;以及平均速度信号和速度偏差信号，其对应于指定的地区。这些信号存储在相应的帧存储器中，然后由彩色处理器处理，以产生彩色视频信号，该彩色视频信号被输入到用于显示断层图像的彩色显示器，以及血流的速度和速度偏差。

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