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    Unaliased quadrature audio synthesizer
    91.
    发明公开
    Unaliased quadrature audio synthesizer 失效
    Audio-Synthetisierer mit Aliasing-Entzerrung und um 90 Grad gegeneinander phasenverschobenen Ausgangssignalen。

    公开(公告)号：EP0159013A2

    公开(公告)日：1985-10-23

    申请号：EP85104578.1

    申请日：1985-04-16

    Applicant: Advanced Technology Laboratories, Inc.

    Inventor： Powers, E. Jeffry

    IPC: A61B8/06

    CPC classification number: G01S15/582 ,  A61B8/06 ,  G01S15/584 ,  G01S15/8979

    Abstract: The apparatus described unaliases a Doppler signal which is related to the velocity of blood flowing in a sample volume. It then generates an audio output corresponding to the unaliased Doppler signal. The device generates an unaliased, instantaneous signal which corresponds to the Doppler frequency associated with the blood velocity in the sample volume. That unaliased instantaneous frequency is fed into programmable read only memories (PROMs) which provide digitized values for the sine and cosine functions. Those values are fed into digital-to-analog converters, and they are scaled to provide audio outputs.

    Abstract translation: 所描述的装置对与在样本体积中流动的血液速度有关的多普勒信号进行解码。 然后它产生对应于未混叠的多普勒信号的音频输出。 该装置产生对应于样品体积中与血液速度相关联的多普勒频率的未混淆的瞬时信号。 该未混淆的瞬时频率被馈送到为正弦和余弦功能提供数字化值的可编程只读存储器（PROM）中。 这些值被馈送到数模转换器，并且它们被缩放以提供音频输出。

    Scan conversion apparatus
    92.
    发明公开
    Scan conversion apparatus 失效
    设备扫描转换。

    公开(公告)号：EP0158920A1

    公开(公告)日：1985-10-23

    申请号：EP85103946.1

    申请日：1985-04-01

    Applicant: Advanced Technology Laboratories, Inc.

    Inventor： Blaker, David M. ,  Hwang, Juin-Jet ,  Zobkiw, Christopher P.

    IPC: G01S7/52 ,  G01S7/62 ,  G06F15/62

    CPC classification number: G06F17/175 ,  G01S7/52044 ,  G01S7/52063 ,  G01S15/8993 ,  G06T11/40

    Abstract: An improved scan converter (100) for converting received echo signals representative of the amplitude of ultrasound energy returning grom sampled points along a plurality of spaced apart paths distributed in an image space into signals to be displayed as display pixels in a raster scan display system (150). The scan converter includes a scan data memory (120) for storing the received echo signals in quadrants of the scan data memory. Each quadrant is associated with even and odd numbered paths and sample row combinations. Sample rows are related to sample points along the spaced apart paths. The scan converter further includes a circuit (1000) for determining a gray scale value to be assigned to each selected display pixel based on a predetermined combination of four received echo signals adjacent the selected display pixel and chosen from the quadrants of the scan data memory. The improved scan converter is capable of operation in both linear and sector scan modes, and, when in the sector mode, over 90° and 180° sectors.

    Intraoperative ultrasound probe
    97.
    发明公开
    Intraoperative ultrasound probe 失效
    INTRAOPERATIVERULTRASCHALLFÜHLER

    公开(公告)号：EP0947162A3

    公开(公告)日：2001-03-28

    申请号：EP99200175.0

    申请日：1993-11-22

    Applicant: ADVANCED TECHNOLOGY LABORATORIES, INC.

    Inventor： Nordgren, Timothy F. ,  Imling, Deborah K. ,  Ungari, Joseph L. ,  Killam, Donald Gilbert ,  McKeighen, Ronald E.

    IPC: A61B8/06 ,  A61B8/12 ,  H01R9/07

    CPC classification number: H01R9/032 ,  A61B8/06 ,  A61B8/12 ,  A61B8/445 ,  H01R9/0515 ,  H01R12/62 ,  H01R2201/12

    Abstract: An intraoperative ultrasonic transducer probe is described comprising a handle section and a transducer section which resemble a tiny leg and foot. The two sections are obtusely angled relative to each other so that the physician may continue to clearly view the surgical site while holding and manipulating the probe. The extension of the transducer section away from its point of attachment to the handle section results in the toe of the foot being insertable under unincised tissue, enabling the surgeon to ultrasonically examine organs and tissue peripheral to the surgical site and to follow a vessel even beyond the incision. The transducer section is completely encapsulated in a rubberlike material which electrically insulates the transducer from the patient, enables the probe to be easily sterilized, and further provides an inherent standoff between the transducer and the contact surface of the probe. Thus, the transducer can be focused immediately at the skin line of the organ or vessel which is in contact with the probe. The probe can be easily assembled by providing termination assemblies for attaching coaxial cable conductors to the printed circuit board assembly of the probe.

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