Ultrasonic diagnostic system gain control
    21.
    发明公开
    Ultrasonic diagnostic system gain control 失效
    Diagnostik-Ultraschall-System mit Regelung desVerstärkungsfaktors

    公开(公告)号:EP0707221A1

    公开(公告)日:1996-04-17

    申请号:EP95307169.3

    申请日:1995-10-11

    CPC classification number: A61B8/467 A61B8/463 G01S7/52033

    Abstract: An ultrasonic diagnostic system is provided which automatically sets up the TGC characteristic to be used for a given ultrasound examination. Upon user selection of a particular ultrasound application, a setup controller accesses a predetermined TGC characteristic for the selected application. The predetermined TGC characteristic is used to control the gain of a TGC amplifier and is also displayed to the user. By adjustment of a series of TGC controls the user can vary the TGC characteristic from the predetermined characteristic.

    Abstract translation: 超声波诊断系统在扫描深度上接收超声回波信号序列,控制序列的放大作为深度的函数。 多个预定时间增益补偿特性被存储在存储器中,并且处理器响应于用户选择特定的超声波诊断程序来选择预定的时间增益补偿特性之一。 放大器耦合到处理器,用于根据所选择的一个预定时间增益补偿特性来控制超声回波信号序列的放大,并且显示所选择的一个预定时间增益补偿特性。

    Ultrasonic imaging by radial scan of trapezoidal sector
    23.
    发明公开
    Ultrasonic imaging by radial scan of trapezoidal sector 失效
    Ultraschallabbildung mit radialer Abtastung einestrapezförmigenSektors。

    公开(公告)号:EP0467690A2

    公开(公告)日:1992-01-22

    申请号:EP91306571.0

    申请日:1991-07-18

    CPC classification number: G01S7/52085 G01S7/52063 G01S15/8918 G10K11/345

    Abstract: An ultrasonic diagnostic imaging system is provided for scanning with a linear transducer array and displaying an image area which is truncated with respect to a conventional triangular image sector to take the form of a trapezoid. Uniformity of image resolution and ease of signal processing enhancement is provided by transmitting adjacent ultrasonic beams at equal angular increments over the sector area. The ultrasonic beams transmitted are focused around predetermined transmit focal points and the transmit aperture employed for each transmission is determined by a transducer sensitivity criterion applied to the focal point. Means are provided for delaying signal components received from the beam directions so that the sum of the components will form a coherent echo signal. Means are provided for dynamically focusing received signal components by dynamically focusing received signal components by dynamically varying the sampling frequencies of laterally disposed signal components, and the receive aperture is dynamically varied in correspondence with the number of array elements which satisfy a sensitivity criterion at different depths of field.

    Abstract translation: 提供了一种超声诊断成像系统,用于使用线性换能器阵列进行扫描,并显示相对于常规三角形图像扇区截取的图像区域以呈现梯形。 通过在扇形区域上以相等的角度增量传输相邻超声波束来提供图像分辨率的均匀性和信号处理增强的容易性。 传输的超声波束聚焦在预定的发射焦点周围,并且用于每个发射的发射孔径由施加到焦点的传感器灵敏度标准确定。 提供了用于延迟从波束方向接收的信号分量的装置,使得分量的和将形成相干回波信号。 提供用于通过动态地改变横向放置的信号分量的采样频率来动态地聚焦接收信号分量来动态聚焦接收信号分量的装置,并且接收孔径与满足不同深度处的灵敏度标准的阵列元素的数量相一致地动态变化 的领域。

    Ultrasound transducer with improved vibrational modes
    27.
    发明公开
    Ultrasound transducer with improved vibrational modes 失效
    具有改进振动模式的超声波传感器

    公开(公告)号:EP0142215A3

    公开(公告)日:1987-03-11

    申请号:EP84303562

    申请日:1984-05-25

    CPC classification number: B06B1/0622

    Abstract: The transducer of the present invention is diced into subelements which have a height-to-width ratio which determines the modality of their vibration. The subelements are then electrically connected to provide a transducer having the desired electrical configuration, i.e., an annular array transducer. Using the present invention, the electro-acoustic characteristics of the transducer are not determinitive of the vibrational characteristics of the individual subelements.

    Transluminal thrombectomy apparatus
    28.
    发明公开
    Transluminal thrombectomy apparatus 失效
    LängsbeweglicheVorrichtungfürdie Thrombektomie。

    公开(公告)号:EP0177782A1

    公开(公告)日:1986-04-16

    申请号:EP85111408.2

    申请日:1985-09-09

    Inventor: Auth, David C.

    CPC classification number: A61B17/22 A61B17/320758 A61B90/39 A61B2017/320733

    Abstract: The invention is an apparatus for breaking up a thrombus by introducing a rotating drive shaft (14) into the thrombus whereby the fibrin of the thrombus will be withdrawn from the thrombus onto the rotating drive shaft (14), thereby breaking up the network of the thrombus which prevents blood flow. The apparatus includes a drive shaft housing (16) which can be used to withdraw fluid from the area of the thrombus or to introduce enzymes, such as streptokinase which will further break up the thrombus or contrast agent for visualizing the vascular anatomy.

    Abstract translation: 本发明是一种用于通过将旋转的驱动轴(14)引入血栓来分解血栓的装置,由此血栓的纤维蛋白将从血栓撤回到旋转驱动轴(14)上,从而破坏血栓的网络 预防血液流通的血栓。 该装置包括驱动轴壳体(16),该驱动轴壳体可用于从血栓区域抽取流体或引入酶,例如链激酶,其将进一步分解用于使血管解剖结构可视化的血栓或造影剂。

    Real time digital scan converter
    30.
    发明公开
    Real time digital scan converter 失效
    实时操作系统的数字扫描转换器。

    公开(公告)号:EP0066126A1

    公开(公告)日:1982-12-08

    申请号:EP82104082.1

    申请日:1982-05-11

    CPC classification number: G01S7/531 G01S7/298

    Abstract: A digital scan converter is disclosed wherein signal information supplied by a sector scanning surveillance system relative to a polar coordinate system is converted to a signal for driving a television-type display or other Cartesian coordinate device by: (a) sampling the signal associated with each consecutive scanning path of the surveillance system at a rate determined by the azimuthal angle that defines the scanning path of interest; (b) storing each set of signal samples as a column of data in a rectangular memory array: (c) accessing the stored data on a row-by-row basis; and (d) utilizing a previously determined mapping strategy to cause each accessed signal sample to form a segment of a line of display within the Cartesian-formulated display devices so that the length of the segment formed by each signal sample is determined by the row and column address of the storage location that is associated therewith when forming a television compatible signal, each signal sample dictates video signal level during a portion of a corresponding horizontal sweep period that is determined by the mapping strategy.

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