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    • 5. 发明授权
    • Adaptive grating lobe suppression in ultrasound imaging
    • 超声成像中的自适应光栅波瓣抑制
    • US07207942B2
    • 2007-04-24
    • US10627290
    • 2003-07-25
    • Kutay F. UstunerAlbert Gee
    • Kutay F. UstunerAlbert Gee
    • A61B8/00
    • A61B8/5269G01S7/52047G10K11/346
    • Adaptive grating lobe suppression is provided. Received ultrasound data is measured, compared or otherwise processed to determine the presence of grating lobe energy. A further process is then altered as a function of the level of grating lobe energy. In one embodiment, the adaptive grating lobe suppression is implemented in the receive beamformer. Data representing a virtual element is formed as a normalized sum of data from adjacent sparse elements. The data from the adjacent elements is correlated to determine the presence of grating lobe energy as a function of the amount of shift associated with the peak correlation. A phase shift is applied to the data representing the virtual element where sufficient grating lobe energy is determined. In another embodiment, an amount of grating lobe energy is measured by comparing data from prior to a filter with filtered data. The filter is selected to isolate main lobe energy from grating lobe energy. A gain is modulated as a function of any detected grating lobe energy or filtered or unfiltered data is selected for further processing.
    • 提供自适应栅瓣抑制。 接收的超声数据被测量,比较或以其他方式处理以确定光栅叶片能量的存在。 然后,另外的过程作为光栅能量的函数而改变。 在一个实施例中,在接收波束形成器中实现自适应光栅波瓣抑制。 表示虚拟元素的数据形成为来自相邻稀疏元素的归一化数据和。 来自相邻元件的数据相关,以确定作为与峰值相关性相关的偏移量的函数的光栅波瓣能量的存在。 对表示确定了足够的光栅能量的虚拟元件的数据应用相移。 在另一个实施例中,通过比较来自滤波器之前的滤波数据的滤波数据来测量光栅叶片能量的量。 选择滤波器以将主波瓣能量与光栅波能分离。 根据任何检测到的光栅波长能量调制增益,或者选择滤波或未滤波的数据进行进一步处理。
    • 10. 发明申请
    • Coherent Image Formation for Dynamic Transmit Beamformation
    • 用于动态发射信号的相干图像形成
    • US20090306512A1
    • 2009-12-10
    • US12477783
    • 2009-06-03
    • Rickard C. LoftmanKutay F. UstunerCharles E. Bradley
    • Rickard C. LoftmanKutay F. UstunerCharles E. Bradley
    • A61B8/14
    • G01S7/52046G01S7/5202G01S7/5209G01S7/52095G10K11/346
    • Retrospective dynamic transmit beamformation is provided in medical ultrasound imaging. Using parallel receive beamformation, sets of data representing locations in at least a common field of view are obtained, each set in response to a transmit with a spatially distinct phase front. The common field of view receive data are time aligned and amplitude weighted for retrospective transmit focusing and retrospective transmit apodization, respectively. A time offset, such as of a cycle or more in some cases, is applied to the receive data for retrospective transmit focusing. The offset is selected to emulate shifting the transmit delay profile to be tangentially intersecting with the dynamic receive delay profile for each location which is the desired transmit delay profile. A weight is applied to the receive data for retrospective transmit apodization. The weight is selected based on the desired transmit apodization profile. The offset and weighted data representing a same location from different transmit events is coherently combined. The number of sets of data offset, weighted and combined may vary as a function of depth for dynamic transmit beamformation.
    • 在医学超声成像中提供回溯动态发射波束形成。 使用并行接收波束形成,获得在至少公共视场中表示位置的数据集合,每个集合响应于具有空间上不同相位前沿的传输。 对于追溯发射聚焦和追溯发射变迹,共同视野接收数据分别对时间对齐和幅度加权。 在一些情况下,例如周期或更多的时间偏移被应用于用于追溯发射聚焦的接收数据。 选择该偏移以模拟将发射延迟分布移动为与期望的发射延迟分布的每个位置的动态接收延迟分布切线相交。 将加权应用于接收数据用于追溯发射变迹。 基于所需的发射变迹轮廓来选择权重。 表示来自不同发送事件的相同位置的偏移和加权数据被一致地组合。 数据偏移量,加权和组合的数量可以随动态传输波束形成的深度而变化。