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11 条记录 (耗时 0.026 秒)

    Synthetic elevation aperture for ultrasound systems and methods
    4.
    发明授权
    Synthetic elevation aperture for ultrasound systems and methods 有权
    超声系统和方法的合成仰角孔径

    公开(公告)号：US07789831B2

    公开(公告)日：2010-09-07

    申请号：US11716368

    申请日：2007-03-09

    申请人： Stephen R. Barnes ,  Mirsaid Bolorforosh ,  D-L Donald Liu

    发明人： Stephen R. Barnes ,  Mirsaid Bolorforosh ,  D-L Donald Liu

    IPC分类号： A61B8/00

    CPC分类号： G01S15/8925 ,  A61B8/483 ,  G01S15/8927 ,  G01S15/894 ,  G01S15/8993 ,  G01S15/8997

    摘要： Using configurable arrays, synthetic aperture processes may be used along an elevation dimension for increasing resolution. The increased resolution is used for two-dimensional or three-dimensional imaging. Alternatively or additionally, wide band synthetic elevation aperture focusing processes, such as beamformation, are provided along the elevation dimension to increase resolution. In yet another alternative or additional embodiment, a transducer is rotated about a center of the transducer within the elevation and azimuth plane. An aperture associated with the transducer is mechanically or electronically rotated, and ultrasound data acquired associated with a plurality of different positions. The ultrasound data is then used for synthetic elevation aperture processing. In yet another alternative or additional embodiment, multiple scanning modes are provided. In a survey mode, imaging is provided without synthetic elevation aperture processing. For greater detailed imaging, imaging is responsive to synthetic elevation aperture processes with different elevation focusing and scanning.

    摘要翻译： 使用可配置阵列，可以沿着高度维度使用合成孔径过程以提高分辨率。 增加的分辨率用于二维或三维成像。 或者或另外，沿着高度尺寸提供宽带合成高程孔径聚焦过程，例如波束形成，以增加分辨率。 在另一替代或另外的实施例中，换能器绕升降和方位平面内的换能器的中心旋转。 与换能器相关联的孔机械地或电子地旋转，并且获取与多个不同位置相关联的超声数据。 然后将超声数据用于合成高程孔径处理。 在又一替代或附加实施例中，提供了多种扫描模式。 在调查模式中，无需合成高程孔径处理即可提供成像。 为了更详细的成像，成像对具有不同高程聚焦和扫描的合成高程孔径过程有反应。

    Dynamic receive beamformer with oversampling for medical diagnostic ultrasound
    6.
    发明授权
    Dynamic receive beamformer with oversampling for medical diagnostic ultrasound 有权
    动态接收波束形成器，用于医疗诊断超声波的过采样

    公开(公告)号：US07583214B2

    公开(公告)日：2009-09-01

    申请号：US11731567

    申请日：2007-03-30

    申请人： D-L Donald Liu ,  Daniel Edward Brueske ,  Brian Vincent Colby

    发明人： D-L Donald Liu ,  Daniel Edward Brueske ,  Brian Vincent Colby

    IPC分类号： H03M3/00

    CPC分类号： G10K11/346 ,  G01S7/52025 ,  G01S7/52034 ,  G01S7/5208 ,  G01S7/52095

    摘要： Receive beamformers for receive beamforming ultrasound information include a plurality of channels. The received signals for each channel are oversampled for conversion to digital form, such as sampling with a sigma-delta converter. The reconstruction of the samples into data at the Nyquist or other rate is performed in stages. Partial reconstruction to a rate less than the oversampling rate, but greater than the Nyquist rate, occurs prior to summation across channels. Delays are implemented by selecting data from the sample stream. After summation, the samples are reconstructed at a Nyquist or other rate.

    摘要翻译： 用于接收波束形成超声信息的接收波束形成器包括多个信道。 每个通道的接收信号被过采样以便转换成数字形式，例如用Σ-Δ转换器进行采样。 以奈奎斯特或其他速率将样本重建为数据分阶段进行。 部分重建的速率小于过采样率，但大于奈奎斯特速率，则发生在跨通道求和之前。 通过从样本流中选择数据来实现延迟。 在求和之后，以奈奎斯特或其他速率重建样本。

    Universal ultrasound sigma-delta receiver path
    7.
    发明授权
    Universal ultrasound sigma-delta receiver path 有权
    通用超声波Σ-Δ接收机路径

    公开(公告)号：US07466256B2

    公开(公告)日：2008-12-16

    申请号：US11731568

    申请日：2007-03-30

    申请人： Daniel Edward Brueske ,  D-L Donald Liu ,  Steven Martin ,  Brian Colby

    发明人： Daniel Edward Brueske ,  D-L Donald Liu ,  Steven Martin ,  Brian Colby

    IPC分类号： H03M3/00

    CPC分类号： G01S7/52028 ,  G01S7/5205 ,  G01S7/5208 ,  G01S7/52095 ,  G01S15/8979

    摘要： Ultrasound information for B-mode and CW Doppler mode use the same digital beamformer. Due to sigma-delta conversion or over sampling, sufficient dynamic range is provided for the desired bandwidth. By mixing the input ultrasound information to base band before conversion, additional dynamic range may be provided. The electrical impedance may be better matched to elements by connecting a different number of sigma-delta converters to an element. Elements with lower impedance may be connected to a plurality of sigma-delta converters. To increase the aperture size for elements with a higher impedance, the same sigma-delta converters may be used as separate receive beamformer channels without the summation.

    摘要翻译： B模式和CW多普勒模式的超声信息使用相同的数字波束形成器。 由于Σ-Δ转换或过采样，为期望的带宽提供足够的动态范围。 通过将输入超声信息与转换之前的基带混合，可以提供额外的动态范围。 通过将不同数量的Σ-Δ转换器连接到元件，电阻抗可以更好地匹配元件。 具有较低阻抗的元件可以连接到多个Σ-Δ转换器。 为了增加具有更高阻抗的元件的孔径尺寸，可以将相同的Σ-Δ转换器用作单独的接收波束形成器通道而不需要求和。

    Synthetic elevation aperture for ultrasound systems and methods
    9.
    发明授权
    Synthetic elevation aperture for ultrasound systems and methods 有权

    公开(公告)号：US07207943B2

    公开(公告)日：2007-04-24

    申请号：US10807681

    申请日：2004-03-24

    申请人： Stephen R. Barnes ,  Mirsaid Bolorforosh ,  D-L Donald Liu

    发明人： Stephen R. Barnes ,  Mirsaid Bolorforosh ,  D-L Donald Liu

    IPC分类号： A61B8/00

    CPC分类号： G01S15/8925 ,  A61B8/483 ,  G01S15/8927 ,  G01S15/894 ,  G01S15/8993 ,  G01S15/8997

    摘要： Using configurable arrays, synthetic aperture processes may be used along an elevation dimension for increasing resolution. The increased resolution is used for two-dimensional or three-dimensional imaging. Alternatively or additionally, wide band synthetic elevation aperture focusing processes, such as beamformation, are provided along the elevation dimension to increase resolution. In yet another alternative or additional embodiment, a transducer is rotated about a center of the transducer within the elevation and azimuth plane. An aperture associated with the transducer is mechanically or electronically rotated, and ultrasound data acquired associated with a plurality of different positions. The ultrasound data is then used for synthetic elevation aperture processing. In yet another alternative or additional embodiment, multiple scanning modes are provided. In a survey mode, imaging is provided without synthetic elevation aperture processing. For greater detailed imaging, imaging is responsive to synthetic elevation aperture processes with different elevation focusing and scanning.

    Plane wave scanning reception and receiver
    10.
    发明授权
    Plane wave scanning reception and receiver 有权
    平面波扫描接收和接收

    公开(公告)号：US06685641B2

    公开(公告)日：2004-02-03

    申请号：US10061402

    申请日：2002-02-01

    申请人： D-L Donald Liu

    发明人： D-L Donald Liu

    IPC分类号： A61B800

    CPC分类号： G01S15/8977 ,  G01S7/52028 ,  G01S15/8904 ,  G01S15/8909

    摘要： Plane waves are transmitted at different incident angles, and the radio frequency echo waveforms received by the elements in an array are processed with a Fourier transform. This method is capable of generating one frame of “raw” image for each transmitted plane wave. The formation of each raw image includes: temporal Fourier transform of radio frequency echo signal from each element; phase rotation; spatial Fourier transform; complex interpolation; and an inverse spatial-temporal Fourier transform. This method does not require the synthesis of limited diffraction beams and is computationally more efficient compared to conventional delay-and-sum approach. These raw images are combined coherently to enlarge spatial frequency coverage and enhance lateral resolution. The resolution-enhanced images are further combined incoherently to achieve speckle reduction.

    摘要翻译： 平面波以不同的入射角发射，由阵列中的元件接收的射频回波波形用傅立叶变换处理。 该方法能够为每个发射的平面波生成一帧“原始”图像。 每个原始图像的形成包括：来自每个元素的射频回波信号的时间傅立叶变换; 相位旋转; 空间傅里叶变换; 复杂插值; 和逆空间 - 时间傅里叶变换。 该方法不需要合成有限的衍射光束，并且与传统的延迟和和方法相比计算上更有效。 这些原始图像被相干地组合以扩大空间频率覆盖并增强横向分辨率。 分辨率增强的图像进一步被不连续地组合以实现斑点减少。