公开(公告)号：EP0627635A3

公开(公告)日：1994-12-28

申请号：EP94202297.1

申请日：1991-07-18

Applicant: ADVANCED TECHNOLOGY LABORATORIES, INC.

Inventor： Daigle, Ronald E.

IPC: G01S15/89 ,  G01S7/52 ,  G10K11/34

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 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.

公开(公告)号：EP0573249A1

公开(公告)日：1993-12-08

申请号：EP93304234.3

申请日：1993-06-01

Applicant: ADVANCED TECHNOLOGY LABORATORIES, INC.

Inventor： Routh, Helen Frances ,  Peterson, Roy Beck ,  Powrie, Charles Wesley, Jr.

IPC: G01S7/52 ,  G01S15/50

CPC classification number: G01S15/58 ,  G01S7/52071

Abstract: A technique for continuously determining and displaying the peak and mean velocities of spectral Doppler information is disclosed. Received spectral Doppler data is examined over a predetermined period to determine the signal to noise ratio of the Doppler signals. Individual instantaneous measurements, or lines, of Doppler spectral information are analyzed in the power versus frequency domain to compare the line information against a noise threshold determined by the signal to noise ratio. The maximum frequency signal component is thereby identified as the peak velocity of the spectral line. Mean velocity is calculated as an intensity weighted mean about the maximum power frequency of the line data. The identified peak and mean velocities are displayed in contrasting colors or shades on a continuously updated and displayed flow velocity versus time spectral display.

Abstract translation: 公开了一种用于连续地确定和显示频谱多普勒信息的峰值和平均速度的技术。 在预定时间段内检查接收到的频谱多普勒数据，以确定多普勒信号的信噪比。 在功率对频域中分析多普勒频谱信息的单个瞬时测量或线，以将线信息与由信噪比确定的噪声阈值进行比较。 因此，最大频率信号分量被识别为谱线的峰值速度。 平均速度被计算为关于线数据的最大功率频率的强度加权平均值。 识别的峰值和平均速度以对比色或阴影显示在连续更新和显示的流速对时间光谱显示上。

公开(公告)号：EP0467690A3

公开(公告)日：1992-12-02

申请号：EP91306571.0

申请日：1991-07-18

Applicant: ADVANCED TECHNOLOGY LABORATORIES, INC.

Inventor： Daigle, Ronald E.

IPC: G01S15/89 ,  G01S7/52 ,  G10K11/34

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.

公开(公告)号：EP0487339A1

公开(公告)日：1992-05-27

申请号：EP91310726.4

申请日：1991-11-21

Applicant: ADVANCED TECHNOLOGY LABORATORIES, INC.

Inventor： Keller, Philip ,  Augustine, Larry J. ,  Daigle, Ronald E.

IPC: A61B8/00 ,  A61B8/08

CPC classification number: G01S15/8993 ,  A61B8/14 ,  A61B8/4254 ,  A61B8/483 ,  G01N2291/02827 ,  G01S15/8936 ,  G01S15/899 ,  Y10S128/916

Abstract: An ultrasonic imaging system is disclosed which produces a sequence of images of planes of a subject including both image and spatial positional information of the image plane. In one embodiment the positional information is developed from a plurality of accelerometers located within a scanhead. The second integrals of the acceleration signals are used to determine positional information of the image plane. In a second embodiment a tranmitter transmits a magnetic field and a receiver attached to the scanhead detects the position of the scanhead in relation to the transmitted magnetic field. Spatially related images are displayed by displaying one image plane in the plane of the display and a second image plane projected in relation thereto. Either of the displayed planes may be displayed in outline form, and the outline may be modulated to depict depth.

Abstract translation: 公开了一种超声波成像系统，其产生包括图像平面的图像和空间位置信息的被摄体平面的图像序列。 在一个实施例中，从位于扫描头内的多个加速度计显影位置信息。 加速度信号的第二积分用于确定图像平面的位置信息。 在第二实施例中，发射器发射磁场，并且附接到扫描头的接收器相对于所发射的磁场检测扫描头的位置。 通过在显示器的平面中显示一个图像平面和相对于其投影的第二图像平面来显示空间相关的图像。 显示的平面中的任一个可以以轮廓形式显示，并且轮廓可以被调制以描绘深度。

公开(公告)号：EP0486269A1

公开(公告)日：1992-05-20

申请号：EP91310445.1

申请日：1991-11-13

Applicant: ADVANCED TECHNOLOGY LABORATORIES, INC.

Inventor： Nelson, Kip Robert ,  Fidel, Howard ,  Aindow, Joseph D., Brewery Cottage

IPC: A61B8/08 ,  G01S15/89 ,  G01S1/72

CPC classification number: A61B8/0841 ,  A61B8/0833 ,  A61B17/3403 ,  A61B2017/00115 ,  A61B2017/3413 ,  A61B2090/3929 ,  B06B1/0688

Abstract: An ultrasonic imaging system for guiding a user in the placement of a medical instrument (10) within the body is described. As the medical instrument (10) approaches the image plane of an imaging transducer (14), ultrasonic wave energy (18) is received by a transducer (22) located on the medical instrument. The level of received energy is detected and used to develop a control signal which varies as a function of the quantum of received energy. The control signal is used to modulate an audible indicator (90), which provides an audible indiction of proximity of the medical instrument to the image plane as the instrument approaches and intersects the plane. A visual marker is produced on an image display (16) which represents the location of the instrument within the body. As the instrument approaches and intersects the image plane the visual marker is also modulated. The system includes a test and calibration mode of operation, which exercises components of the medical instrument transducer signal processor (12), and also transmits calibration signals to the image display for calibration and verification purposes prior to the commencement of a medical procedure.

Abstract translation: 用于在身体内的医疗器械（10）的放置引导用户的超声成像系统进行说明。 作为医疗器械（10）接近的成像换能器（14），超声波能量（18）的像面是由位于在医疗器械上的换能器（22）接收。 检测接收到的能量的水平和用于开发而变化作为能量接收的量子的功能的控制信号。 的控制信号被用来调制计划可听指示器（90），这在医疗器械的邻近图像平面的小纪提供可听作为仪器途径和相交。 可见标记的图像显示（16），其在主体内darstellt仪器的位置上产生。 作为仪器方法和交叉图像平面视觉标记由此调制。 该系统包括操作的测试和校准模式，该模式行使医疗器械换能器信号处理器（12）的组件，并且因此发送校准信号为之前的医疗过程的开始校准和验证目的的图像显示。

公开(公告)号：EP0158920B1

公开(公告)日：1991-01-30

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

公开(公告)号：EP0159013A3

公开(公告)日：1988-05-11

申请号：EP85104578

申请日：1985-04-16

Applicant: Advanced Technology Laboratories, Inc.

Inventor： Powers, E. Jeffry

IPC: A61B08/06

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: 所描述的设备没有确定与血液在样本体积中流动的速度有关的多普勒信号。 然后它产生一个对应于非混叠多普勒信号的音频输出。 该装置产生一个非混淆的瞬时信号，该信号对应于与样本体积中的血液流速相关的多普勒频率。 该非混叠瞬时频率被馈入可编程只读存储器（PROM），为正弦和余弦函数提供数字化值。 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。

公开(公告)号：EP0212090A1

公开(公告)日：1987-03-04

申请号：EP86107241.1

申请日：1986-05-28

Applicant: Advanced Technology Laboratories, Inc.

Inventor： DesJardins, Philip A. ,  Powers, Jeffry E.

IPC: A61B8/06

CPC classification number: A61B8/06

Abstract: A Doppler blood velocity measuring device is described which includes anti-aliasing circuitry. The anti-aliasing circuitry is based upon the use of a multigate Doppler unit (12) which receives Doppler shift frequency information from various depth ranges. Thereafter, the Doppler frequencies received are corrected by adding a correction frequency to the perceived Doppler frequency with the correction frequency selected based on the assumption that blood flow velocity cannot change drastically between adjacent depths.

Abstract translation: 描述了包括抗混叠电路的多普勒血流速度测量装置。 抗混叠电路基于使用从多个深度范围接收多普勒频移信息的多普勒多普勒单元（12）。 此后，通过将校正频率与基于假定血流速度在相邻深度之间不能显着变化的选择的校正频率相加来校正所接收的多普勒频率。

公开(公告)号：EP0210624A2

公开(公告)日：1987-02-04

申请号：EP86110371.1

申请日：1986-07-28

Applicant: Advanced Technology Laboratories, Inc.

Inventor： Augustine, Larry J.

IPC: G10K11/34

CPC classification number: G01S7/52095 ,  G01S7/52077 ,  G10K11/348

Abstract: The present invention is a multiline beamformer for use in a medical ultrasound scasnner using a phased array transducer. Lines of ultrasound energy are generated having a pressure at the array aperture corresponding to sin(πx)/πx, where x is the normalized distance of the array element measured from the center of the array. This transmitted energy creates a flat field in space which can then be received in multiple receive lines, using bundled, parallel time delays.

Abstract translation: 本发明是一种用于使用相控阵变换器的医用超声波扫描仪中的多束波束形成器。 产生具有对应于sin（pi x）/ pi x的阵列孔径处的压力的超声能量线，其中x是从阵列的中心测量的阵列元件的归一化距离。 这种传输的能量在空间中产生平坦的场，然后可以使用捆绑的并行时间延迟在多个接收线中接收。

公开(公告)号：EP0167927A1

公开(公告)日：1986-01-15

申请号：EP85107911.1

申请日：1985-06-26

Applicant: Advanced Technology Laboratories, Inc.

Inventor： Hilse, Gernot Rudolf Kurt

IPC: A61B17/32 ,  A61B17/22

CPC classification number: A61B17/320758 ,  A61B17/22031

Abstract: The present invention relates to a seal for a rotatable therapeutic catheter, such as a motor driven therapeutic catheter. The seal is made of a drive shaft (10) which extends through an elongated bushing (28). The combined drive shaft and bushing form a low-friction axle/bearing combination such that there is little friction between them. In addition, the long restrictive path between the drive shaft and the bushing serves to prevent leakage between them.