Method and apparatus for color flow imaging using Golay-coded excitation
on transmit and pulse compression on receive
    1.
    发明授权
    Method and apparatus for color flow imaging using Golay-coded excitation on transmit and pulse compression on receive 失效
    使用Golay编码激励对接收时的发射和脉冲压缩的彩色流成像的方法和装置

    公开(公告)号:US6095977A

    公开(公告)日:2000-08-01

    申请号:US48487

    申请日:1998-03-26

    摘要: A method and an apparatus for improving the signal-to-noise ratio (SNR) and/or resolution in color flow ultrasound imaging by using complementary-coded excitation of the transducer array. The SNR is improved by transmitting a pair of Golay-coded pulse sequences in alternating sequence at the same transmit focal position over multiple firings and then partly decoding the beamsummed data. The partly decoded data is then vector summed and high pass filtered. The summed and high-pass-filtered data is optionally decimated by a factor of two. The decimated or undecimated data is then input to the parameter estimator, which provides imaging signals representing the flow in a scan plane. Those imaging signals are then displayed as color information on a display monitor.

    摘要翻译: 一种用于通过使用换能器阵列的互补编码激励来改善彩色流超声成像中的信噪比(SNR)和/或分辨率的方法和装置。 通过在多个发射处以相同的发射焦点位置以交替的顺序传输一对Golay编码的脉冲序列,然后部分解码分束数据来改善SNR。 然后部分解码的数据被矢量相加和高通滤波。 相加和高通滤波数据可任选地被抽取二倍。 然后,抽取或未解压缩的数据被输入到参数估计器,该估计器提供表示扫描平面中的流的成像信号。 然后将这些成像信号作为显示监​​视器上的颜色信息显示。

    Method and apparatus for color flow imaging using coded excitation with
single codes
    2.
    发明授权
    Method and apparatus for color flow imaging using coded excitation with single codes 失效
    使用单码编码激励进行彩色流成像的方法和装置

    公开(公告)号:US5938611A

    公开(公告)日:1999-08-17

    申请号:US48760

    申请日:1998-03-26

    IPC分类号: A61B8/06 G01S7/52 G01S15/89

    摘要: A color flow imaging technique uses coded excitation on transmit and pulse compression on receive. Coded excitation allows a long transmit pulse to be compressed on receive such that most energy is concentrated in a short interval. Multiple transmit firings of the same coded pulse sequence are focused at the same transmit focal position with the same transmit characteristics. The receive signals are compressed utilizing matched or mismatched filtering. These techniques can be used to maximize color flow sensitivity in deep-lying regions. Alternatively, for a given transmit acoustic burst length and dosage, the spatial resolution can be improved without compromising sensitivity.

    摘要翻译: 彩色流成像技术在接收时对发送和脉冲压缩使用编码激励。 编码激励允许在接收时压缩长的发射脉冲,使得大部分能量集中在短的间隔内。 相同编码脉冲序列的多个发射发射被聚焦在具有相同发射特性的相同发射焦点位置处。 使用匹配或不匹配的滤波来对接收信号进行压缩。 这些技术可用于最大限度地提高深层区域的色彩流动灵敏度。 或者,对于给定的发射声学突发长度和剂量,可以在不影响灵敏度的情况下改善空间分辨率。

    Method and apparatus for enhancing segmentation in three-dimensional
ultrasound imaging
    5.
    发明授权
    Method and apparatus for enhancing segmentation in three-dimensional ultrasound imaging 失效
    用于增强三维超声成像分割的方法和装置

    公开(公告)号:US5865750A

    公开(公告)日:1999-02-02

    申请号:US852699

    申请日:1997-05-07

    摘要: A method and an apparatus for three-dimensional imaging of ultrasound data by constructing projections of data from a volume of interest. An ultrasound scanner collects B-mode or color flow images in a cine memory, i.e., for a multiplicity of slices. A multi-row transducer array having a uniform elevation beamwidth is used to provide reduced slice thickness. The data from a respective region of interest for each of a multiplicity of stored slices is sent to a master controller, such data forming a volume of interest. The master controller performs an algorithm that projects the data in the volume of interest onto a plurality of rotated image planes using a ray-casting technique. The data for each projection is stored in a separate frame in the cine memory. These reconstructed frames are then displayed selectively by the system operator. Segmentation of three-dimensional projection images is enhanced by decreasing the thickness and increasing the resolution (i.e., decreasing the point spread function) of the two-dimensional slices from which the projections are derived. The slice thickness is decreased by increasing the elevational focus of the beam. The two-dimensional resolution is increased by opening the aperture, i.e., decreasing the f-number, and by increasing the band-width.

    摘要翻译: 一种用于通过构建来自感兴趣体积的数据的投影的超声数据的三维成像的方法和装置。 超声波扫描仪在电影存储器中收集B模式或彩色流图像,即多个切片。 使用具有均匀的仰角波束宽度的多行换能器阵列来提供减小的切片厚度。 将多个存储的片中的每一个的相关感兴趣区域的数据发送到主控制器,这样的数据形成感兴趣的体积。 主控制器执行使用光线投射技术将感兴趣体积中的数据投影到多个旋转图像平面上的算法。 每个投影的数据存储在电影存储器中的单独帧中。 这些重建的帧然后由系统操作员选择性地显示。 三维投影图像的分割通过减小厚度并增加从其导出投影的二维切片的分辨率(即减小点扩散函数)来增强。 通过增加光束的高程聚焦来减小切片厚度。 通过打开孔径即减小f值并通过增加带宽来增加二维分辨率。

    Method and apparatus for measuring flow in multi-dimensional ultrasound
    6.
    发明授权
    Method and apparatus for measuring flow in multi-dimensional ultrasound 有权
    用于测量多维超声波流量的方法和装置

    公开(公告)号:US09380992B2

    公开(公告)日:2016-07-05

    申请号:US11731283

    申请日:2007-03-30

    摘要: A method and system are provided for estimating velocity of flow within an ultrasound dataset. A sample volume gate is defined on a two-dimensional (2D) image. The 2D image is based on an ultrasonic dataset. Spectral Doppler velocity estimates of flow are detected within the sample volume gate in first and second dimensions that are orthogonal with respect to each other. A true velocity estimate of the flow within the sample volume gate is determined based on the Doppler velocity estimates.

    摘要翻译: 提供了用于估计超声数据集内的流速的方法和系统。 样本体积门被定义在二维(2D)图像上。 2D图像基于超声数据集。 在彼此正交的第一维和第二维中的样本体积门内检测流的光谱多普勒速度估计。 基于多普勒速度估计确定样本体积门内的流量的真实速度估计。

    Enhanced tissue-generated harmonic imaging using coded excitation
    9.
    发明授权
    Enhanced tissue-generated harmonic imaging using coded excitation 有权
    使用编码激励增强组织生成的谐波成像

    公开(公告)号:US06375618B1

    公开(公告)日:2002-04-23

    申请号:US09494465

    申请日:2000-01-31

    IPC分类号: A61B800

    摘要: In performing tissue-generated harmonic imaging using coded excitation, the transmit waveform for acquiring the N-th harmonic signal is biphase (1,−1) encoded using two code symbols of a code sequence, the portions (i.e., chips) of the transmit waveform encoded with the second code symbol each being phase-shifted by 180°/N relative to the chips encoded with the first code symbol. This is implemented by time shifting the portions (i.e., chips) of the transmit sequence which are encoded with the second code symbol by ½N fractional cycle at center frequency relative to the chips of the transmit sequence encoded with the first code symbol. During reception, the desired harmonic signal is isolated by a bandpass filter centered at twice the fundamental frequency and enhanced with decoding.

    摘要翻译: 在使用编码激励进行组织生成的谐波成像时,用于获取N次谐波信号的发送波形是使用码序列的两个码符号进行编码的双相(1,-1),发送的部分(即,码片) 用第二代码符号编码的波形,每个相对于用第一代码符号编码的码片相移180°/ N。 这是通过使用第二代码符号编码的发送序列的部分(即,芯片)以中心频率相对于以第一代码符号编码的发送序列的码片为中心的1/2分数周期来实现的。 在接收期间,期望的谐波信号由以基频两倍为中心的带通滤波器隔离,并通过解码增强。

    Accumulation imaging
    10.
    发明授权
    Accumulation imaging 有权
    积累成像

    公开(公告)号:US07583828B2

    公开(公告)日:2009-09-01

    申请号:US10920813

    申请日:2004-08-18

    IPC分类号: G06K9/00 A61B8/00

    CPC分类号: A61B8/5276 A61B8/08

    摘要: A system for displaying accumulated ultrasound images of tissue structures. A set of N image frames is used to produce a peak image display. Multiple peak image displays are produced by discarding the oldest image frame in the set of N image frames and replacing the discarded image frame with another more recent image frame. The more recent image frame is added to the set of image frames to produce a new set of N image frames. The new set of N image frames is used to produce another peak display image. If there is an undesirable amount of distortion or blur in the peak display images due to tissue motion, then the number of image frames in the set of N image frames can be reduced.

    摘要翻译: 一种用于显示组织结构的累积超声图像的系统。 使用一组N个图像帧来产生峰值图像显示。 通过丢弃N个图像帧的集合中的最旧的图像帧并用另一个更新的图像帧替换丢弃的图像帧来产生多个峰值图像显示。 更新的图像帧被添加到图像帧集合以产生新的N个图像帧集合。 新的N个图像帧集合用于产生另一个峰值显示图像。 如果由于组织运动而在峰值显示图像中存在不希望的失真量或模糊,则可以减少N个图像帧组中的图像帧数。