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1. 发明授权

US4594896A Method of and device for scanning objects by ultrasound echography 失效
标题翻译：超声波回波检查方法和扫描对象的方法
公开(公告)号：US4594896A
公开(公告)日：1986-06-17
申请号：US659798
申请日：1984-10-11
申请人： Jean-Francois Cardoso , Mathias Fink , Francois Hottier
发明人： Jean-Francois Cardoso , Mathias Fink , Francois Hottier
IPC分类号： A61B8/08 , A61B8/00 , G01N29/28 , G01N29/44 , G01S7/52 , G01N29/00
CPC分类号： G01S7/52058 , G01S7/52025 , G01S7/52036
摘要： A method for the scanning of non-linearly dispersive objects whereby changes of the energy spectrum of echographic signals can be quantitatively related to parameters of the objects examined, that is to say the ultrasonic attenuation factor .beta. and the exponent r which characterizes the relationship between the non-linear variation of the attenuation and the frequency. To this end, the signals received are split into a number of (n) substantially equally wide, consecutive frequency bands which together cover approximately all frequencies of the signals received. The envelope of the signals in each frequency band is determined and each of the envelopes is multiplied by a correction signal in order to compensate for the diffraction effect. The logarithm of the envelopes thus corrected is determined, after which the following operations are performed by means of the n signals thus obtained:(a) the slope .beta.f.sub.i.sup.r of each of these n signals is determined;(b) this signal .beta.f.sub.i.sup.r is converted into logarithmic form;(c) in a table or a curve the relationship is laid down between the logarithmic value of the frequency for each channel log f.sub.i and the logarithmic value log .beta.f.sub.i.sup.r is generated; and(d) the slope of the curve thus obtained and the value of log .beta.f.sup.r for log f=0 are determined.
摘要翻译：一种用于扫描非线性色散物体的方法，其中回波信号的能谱的变化可以与被检查物体的参数定量相关，也就是说超声衰减因子β和指数r表示衰减和频率的非线性变化。为此，所接收的信号被分成若干（n）个基本相等宽的连续频带，它们共同覆盖所接收信号的大约所有频率。确定每个频带中的信号的包络，并且将每个包络乘以校正信号以补偿衍射效应。确定如此校正的包络的对数，之后通过如此获得的n个信号执行以下操作：（a）确定这n个信号中的每一个的斜率βfir; （b）将该信号βfir转换成对数形式; （c）在表或曲线中，生成每个通道log fi的频率的对数值和对数值logβfir之间的关系; 和（d）如此获得的曲线的斜率和log f = 0的logβfr的值被确定。

2. 发明授权

US4576046A Device for the examination of objects by means of ultrasound echography 失效
标题翻译：通过超声波回波检查对物体进行检测的装置
公开(公告)号：US4576046A
公开(公告)日：1986-03-18
申请号：US680415
申请日：1984-12-11
申请人： Mathias A. Fink , Jean-Francois Cardoso
发明人： Mathias A. Fink , Jean-Francois Cardoso
IPC分类号： A61B8/14 , A61B8/00 , G01N29/44 , G01S7/52 , G01S15/88 , G01S15/89 , G01N29/04
CPC分类号： G01S7/52025 , G01S15/8954 , G01S7/52036 , G01S7/5205
摘要： A device for scanning objects by means of ultrasound echography, comprising at least one ultrasound transducer (10) which is connected to a transmitter stage (20) and to a receiver stage (30) which comprises an amplifier (40), a correction circuit (50) for the correction of the gain as a function of time, and a processing circuit (60) for the processing of the results of the echographic examination. The receiver and processing stage also comprise a circuit (70) which is connected to the output of the assembly formed by the amplifier and the gain correction circuit and which comprises means for determining the instantaneous frequency and the instantaneous energy of the echographic signal, means for weighting the instantaneous frequency with the instantaneous energy, and a diffraction correction circuit (80).
摘要翻译：一种用于通过超声波回波检查来扫描物体的装置，包括连接到发射器级（20）的至少一个超声换能器（10）和包括放大器（40），校正电路（40）的接收器级 50），用于校正作为时间的函数的增益;以及处理电路（60），用于处理回波检查的结果。接收器和处理级还包括电路（70），其连接到由放大器和增益校正电路形成的组件的输出，并且包括用于确定回波信号的瞬时频率和瞬时能量的装置，用瞬时能量对瞬时频率进行加权，以及衍射校正电路（80）。

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