利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

17 条记录 (耗时 0.04 秒)

    SYSTEMS AND METHODS FOR REDUCING NON-UNIFORM ROTATION DISTORTION IN ULTRASOUND IMAGES
    4.
    发明申请
    SYSTEMS AND METHODS FOR REDUCING NON-UNIFORM ROTATION DISTORTION IN ULTRASOUND IMAGES 有权
    用于减少超声图像中非均匀旋转失真的系统和方法

    公开(公告)号：US20120108969A1

    公开(公告)日：2012-05-03

    申请号：US13239160

    申请日：2011-09-21

    申请人： Anming He Cai

    发明人： Anming He Cai

    IPC分类号： A61B8/13

    CPC分类号： A61B8/5269 ,  A61B8/12 ,  A61B8/445 ,  A61B8/4461 ,  A61B8/5207

    摘要： A method for generating an ultrasound image includes receiving an image frame having consecutive ultrasound scan lines obtained using a rotating ultrasound imaging arrangement and determining first and second cross-correlation values for a plurality of the scan lines. For each individual scan line, the first cross-correlation value includes a cross-correlation coefficient between a first subframe of consecutive scan lines including the individual scan line and a second subframe of scan lines shifted from the first subframe by a first integer value. The second correlation value includes a cross-correlation coefficient between the first subframe and a third subframe of scan lines shifted from the first subframe by a second integer value. The method further includes evaluating, individually for multiple scan lines, whether that scan line exhibits non-uniform rotation distortion using at least one of the first and second cross-correlation values. A correction for non-uniform rotation distortion is applied.

    摘要翻译： 一种用于产生超声波图像的方法包括接收具有使用旋转超声成像装置获得的连续超声波扫描线的图像帧，并且确定多条扫描线的第一和第二互相关值。 对于每个单独的扫描线，第一互相关值包括包括单独扫描线的连续扫描线的第一子帧与从第一子帧移位第一整数值的扫描线的第二子帧之间的互相关系数。 第二相关值包括从第一子帧移位第二整数值的扫描线的第一子帧和第三子帧之间的互相关系数。 该方法还包括分别针对多个扫描线评估该扫描线是否使用第一和第二互相关值中的至少一个呈现不均匀的旋转失真。 应用不均匀旋转失真的校正。

    Multiple pattern transducer array and method of use
    5.
    发明授权
    Multiple pattern transducer array and method of use 失效
    多模式换能器阵列及其使用方法

    公开(公告)号：US07311667B2

    公开(公告)日：2007-12-25

    申请号：US10238523

    申请日：2002-09-09

    申请人： Anming He Cai ,  Lewis J. Thomas

    发明人： Anming He Cai ,  Lewis J. Thomas

    IPC分类号： A61B8/00

    CPC分类号： B06B1/0629

    摘要： Transducer with different array configurations and methods of using the transducers are provided. An electrode layer on one side of a transducer device defines a one-dimensional array of elements. An electrode layer on an opposite side of the transducer device defines a multi-dimensional array. For example, one transducer device may be used for both two-dimensional imaging and three-dimensional imaging in response to the one-dimensional array and multi-dimensional array electrode configurations. Real time three-dimensional imaging and two-dimensional imaging may be provided with a single transducer. As another example, elements defined by one electrode configuration have a different surface area than elements defined by another electrode configuration. The different configurations on opposite sides of the transducer devices may be a same type (e.g. both one-dimensional arrays) or different types.

    摘要翻译： 提供具有不同阵列配置的传感器和使用换能器的方法。 在换能器装置的一侧上的电极层限定了一维的元件阵列。 在换能器装置的相对侧上的电极层限定多维阵列。 例如，响应于一维阵列和多维阵列电极配置，一个换能器装置可用于二维成像和三维成像。 可以提供实时三维成像和二维成像单个换能器。 作为另一示例，由一个电极配置限定的元件具有与由另一电极配置限定的元件不同的表面积。 换能器装置的相对侧上的不同配置可以是相同类型（例如，一维阵列）或不同类型。

    Medical diagnostic ultrasound contrast agent destruction with reduced biological effect
    6.
    发明授权
    Medical diagnostic ultrasound contrast agent destruction with reduced biological effect 失效
    医学诊断超声造影剂破坏，生物效应降低

    公开(公告)号：US07946988B2

    公开(公告)日：2011-05-24

    申请号：US11302567

    申请日：2005-12-13

    申请人： Anming He Cai ,  Lewis J. Thomas

    发明人： Anming He Cai ,  Lewis J. Thomas

    IPC分类号： A61B8/00

    CPC分类号： A61B8/14 ,  A61B8/06 ,  A61B8/13 ,  A61B8/481

    摘要： Contrast agent destruction transmissions have reduced biological effect in medical diagnostic ultrasound. Ramping-up amplitude and/or ramping-down frequency reduce biological effect. The amplitude ramps up linearly or non-linearly. The change in amplitude or frequency occurs over a single waveform or over a sequence of separate transmissions. An envelope of the single waveform or the sequence of separate transmissions has a non-uniform, asymmetrical, symmetrical, rectangular or other shape. For example, the frequency ramp-down is provided with a non-Gaussian envelope. The amplitude ramp-up or frequency ramp-down is a progressively increasing destructive characteristic or ability, destroying contrast agent at different regions relative to focal regions with a minimum of acoustic energy.

    摘要翻译： 对比剂破坏传播在医学诊断超声中具有降低的生物学效应。 上升幅度和/或下降频率降低生物效应。 幅度线性或非线性地上升。 振幅或频率的变化发生在单个波形或单独传输序列上。 单个波形的包络或单独传输的序列具有不均匀，不对称，对称，矩形或其他形状。 例如，频率斜降具有非高斯包络。 幅度上升或频率斜降是逐渐增加的破坏性特征或能力，破坏相对于具有最小声能的焦点区域的不同区域处的造影剂。

    Medical diagnostic ultrasound system and method for flow analysis
    7.
    发明授权
    Medical diagnostic ultrasound system and method for flow analysis 有权
    医学诊断超声系统及流量分析方法

    公开(公告)号：US06503202B1

    公开(公告)日：2003-01-07

    申请号：US09607556

    申请日：2000-06-29

    申请人： John A. Hossack ,  Thilaka S. Sumanaweera ,  Anming He Cai ,  Sandy Napel ,  David Paik ,  Brooke Jeffrey, Jr.

    发明人： John A. Hossack ,  Thilaka S. Sumanaweera ,  Anming He Cai ,  Sandy Napel ,  David Paik ,  Brooke Jeffrey, Jr.

    IPC分类号： A61B802

    CPC分类号： A61B8/06 ,  A61B8/13 ,  G06F19/00

    摘要： Medical diagnostic ultrasound methods and systems for automated flow analysis are provided. Multiple cross-sectional areas along a vessel are determined automatically. A processor locates an abnormality as a function of the multiple cross-sectional areas, such as identifying a cross-sectional area that is a threshold amount less than an average cross-sectional area. The abnormal area is highlighted on the display to assist with medical diagnosis. For the carotid artery, the interior and exterior branches are labeled to assist medical diagnosis. The two branches are automatically identified. The branch associated with additional small branches is identified as the exterior carotid.

    摘要翻译： 提供了用于自动化流量分析的医疗诊断超声方法和系统。 自动确定沿船只的多个横截面积。 处理器根据多个横截面区域来定位异常，例如识别小于平均横截面积的阈值量的横截面面积。 异常区域在显示屏上突出显示，以协助医疗诊断。 对于颈动脉，内部和外部分支被标记以协助医学诊断。 两个分支自动识别。 与额外的小分支相关的分支被鉴定为外颈动脉。

    Medical ultrasonic imaging system with adaptive multi-dimensional back-end mapping
    8.
    发明授权
    Medical ultrasonic imaging system with adaptive multi-dimensional back-end mapping 有权
    医学超声成像系统具有自适应多维后端映射

    公开(公告)号：US06398733B1

    公开(公告)日：2002-06-04

    申请号：US09556354

    申请日：2000-04-24

    申请人： Constantine Simopoulos ,  Kutay F. Ustuner ,  Anming He Cai ,  John Jackson ,  Matthew O'Donnell

    发明人： Constantine Simopoulos ,  Kutay F. Ustuner ,  Anming He Cai ,  John Jackson ,  Matthew O'Donnell

    IPC分类号： A61B800

    CPC分类号： G01S15/8988 ,  A61B8/14 ,  G01S7/52026 ,  G01S7/52033 ,  G01S7/52034 ,  G01S7/52036

    摘要： A medical ultrasonic imaging system uses an adaptive multi-dimensional back-end mapping stage to eliminate loss of information in the back-end, minimize any back-end quantization noise, reduce or eliminate electronic noise, and map the local average of soft tissue to a target display value throughout the image. The system uses spatial variance to identify regions of the image corresponding substantially to soft tissue and a noise frame acquired with the transmitters turned off to determine the mean system noise level. The system then uses the mean noise level and the identified regions of soft tissue to both locally and adaptively set various back-end mapping stages, including the gain and dynamic range.

    摘要翻译： 医疗超声成像系统使用自适应多维后端映射阶段来消除后端信息的丢失，最小化任何后端量化噪声，减少或消除电子噪声，并将软组织的局部平均值映射到 整个图像中的目标显示值。 该系统使用空间方差来识别基本上对应于软组织的图像的区域，并且使用发射器关闭的噪声帧来确定平均系统噪声水平。 然后，系统本地使用平均噪声水平和软组织的识别区域，并自适应地设置各种后端映射阶段，包括增益和动态范围。

    Systems and methods for making and using rotational transducers for concurrently imaging blood flow and tissue
    9.
    发明授权
    Systems and methods for making and using rotational transducers for concurrently imaging blood flow and tissue 有权
    用于制造和使用旋转传感器同时成像血液和组织的系统和方法

    公开(公告)号：US08591421B2

    公开(公告)日：2013-11-26

    申请号：US13239124

    申请日：2011-09-21

    申请人： Anming He Cai

    发明人： Anming He Cai

    IPC分类号： A61B8/14

    CPC分类号： A61B8/488 ,  A61B8/06 ,  A61B8/12 ,  A61B8/13 ,  A61B8/445 ,  A61B8/4461 ,  A61B8/463 ,  A61B8/464 ,  A61B8/5207 ,  A61B8/5246 ,  A61B8/5276

    摘要： A method for generating a composite image using an intravascular imaging device includes receiving reflected echo signals from at least one transducer along a first of a plurality of radial scan lines. The received echo signals are passed through a plurality of signal processing channels to form a plurality of filtered signals. The filtered signals include a high-resolution tissue structure signal and at least one first pre-blood-flow-mask signal. High-resolution tissue structure signals are processed to form a high-resolution tissue structural image. First pre-blood-flow-mask signals are cross-correlated with second pre-blood-flow-mask signals from an adjacent radial scan line to form blood-flow-mask signals. Blood-flow-mask signals are processed to form a blood-flow mask. For each pixel of the composite image, it is determined whether to use a corresponding pixel of the high-resolution tissue structural image or a corresponding pixel of the cross-correlated blood flow mask to generate the composite image pixel.

    摘要翻译： 使用血管内成像装置产生合成图像的方法包括沿着多个径向扫描线中的第一个从至少一个换能器接收反射回波信号。 所接收的回波信号通过多个信号处理通道以形成多个滤波信号。 经滤波的信号包括高分辨率组织结构信号和至少一个第一前血流量屏蔽信号。 处理高分辨率组织结构信号以形成高分辨率组织结构图像。 第一个前血流量屏蔽信号与来自相邻的放射线扫描线的第二个前血流量屏蔽信号交互相关，以形成血流屏蔽信号。 处理血液流通屏蔽信号以形成血流掩模。 对于合成图像的每个像素，确定是否使用高分辨率组织结构图像的相应像素或交叉相关血流掩模的对应像素来生成合成图像像素。

    Steering angle varied pattern for ultrasound imaging with a two-dimensional array
    10.
    发明授权
    Steering angle varied pattern for ultrasound imaging with a two-dimensional array 有权
    用二维阵列进行超声成像的转向角变化

    公开(公告)号：US07833163B2

    公开(公告)日：2010-11-16

    申请号：US10732136

    申请日：2003-12-10

    申请人： Anming He Cai

    发明人： Anming He Cai

    IPC分类号： A61B8/00

    CPC分类号： G01S15/8925 ,  G01S7/52047

    摘要： Methods and systems for varying a pattern as a function of steering angle for medical imaging with a multidimensional array are provided. Transmit waveform, delay, phase or apodization patterns in addition to delays, phases or apodization for focusing are used with a multidimensional array. By applying a periodic variation perpendicular to the steering direction, the effects of grating lobes due to the variation may be reduced. Along the steering direction, additional offsets are not provided, but may be provided. This different or non-existent offsets provide less grating lobe clutter. The transmit aperture is adjusted to be parallel to a direction of steering of non-normal transmit scan line or scan lines. The variation pattern is selected to result in enhancement or isolation of one or more frequency bands from one or more other frequency bands, such as isolation of second harmonic information from fundamental transmit frequency information.

    摘要翻译： 提供了用于利用多维阵列改变作为医学成像的转向角的函数的图案的方法和系统。 与多维阵列一起使用发送波形，延迟，相位或变迹模式以及聚焦的延迟，相位或变迹。 通过施加垂直于转向方向的周期性变化，可能会降低由于变化引起的光栅叶片的影响。 沿着转向方向，不提供额外的偏置，但可以提供。 这种不同或不存在的偏移量提供较少的栅瓣杂波。 发射孔径被调节为平行于非正常发射扫描线或扫描线的转向方向。 选择变化模式以导致来自一个或多个其它频带的一个或多个频带的增强或隔离，诸如从基本发射频率信息中分离二次谐波信息。