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108 条记录 (耗时 0.043 秒)

    Method and system for reducing undesirable cross talk in diagnostic ultrasound arrays
    92.
    发明授权
    Method and system for reducing undesirable cross talk in diagnostic ultrasound arrays 失效
    用于减少诊断超声阵列中不期望的串扰的方法和系统

    公开(公告)号：US06918877B2

    公开(公告)日：2005-07-19

    申请号：US10635687

    申请日：2003-08-05

    申请人： John A. Hossack ,  Gregory L. Woicik

    发明人： John A. Hossack ,  Gregory L. Woicik

    IPC分类号： A61B8/00 ,  A61B8/06 ,  B06B1/02 ,  B06B1/06 ,  G01H11/06 ,  G10K11/34

    CPC分类号： G10K11/346 ,  B06B1/0292 ,  B06B1/0622 ,  G01H11/06

    摘要： Practical diagnostic ultrasound arrays invariably exhibit a degree of unwanted inter-element cross coupling or cross talk. This results in degraded beam performance that in turn results in degraded image resolution (spatial resolution and contrast performance). Current approaches to reducing inter element coupling may be costly and may make the transducer array fragile. There is a need to overcome the cross talk problem with minimal expense and impact on reliability. The approach taken here overcomes a substantial component of the cross talk with minimal expense. The approach is versatile and has applicability in both transmit and receive. The approach improves image resolution. This technique has particular applicability in the field of silicon substrate based MEMS transducers in which the continuous, low loss, silicon wafer substrate gives rise to significant unwanted cross talk.

    摘要翻译： 实际的诊断超声阵列总是表现出一定程度的不必要的元件间交叉耦合或串扰。 这导致光束性能下降，从而导致图像分辨率降低（空间分辨率和对比度性能）。 减少元件间耦合的当前方法可能是昂贵的，并且可能使得换能器阵列易碎。 需要以最小的成本和对可靠性的影响来克服串扰问题。 这里采取的方法克服了交叉话题的重要组成部分，并以最低的费用。 该方法是多功能的，并且在发送和接收两者中都具有适用性。 该方法提高了图像分辨率。 该技术在基于硅衬底的MEMS传感器领域中具有特别的适用性，其中连续的低损耗硅晶片衬底产生显着的不希望的串扰。

    Medical diagnostic ultrasound catheter and method for position determination
    93.
    发明授权
    Medical diagnostic ultrasound catheter and method for position determination 有权
    医疗诊断超声导管及位置测定方法

    公开(公告)号：US06612992B1

    公开(公告)日：2003-09-02

    申请号：US09516868

    申请日：2000-03-02

    申请人： John A. Hossack ,  Michael G. Curley ,  Thilaka S. Sumanaweera ,  John I. Jackson

    发明人： John A. Hossack ,  Michael G. Curley ,  Thilaka S. Sumanaweera ,  John I. Jackson

    IPC分类号： A61B200

    CPC分类号： A61B8/445 ,  A61B5/065 ,  A61B8/12 ,  A61B8/4254 ,  G01S15/8993

    摘要： A catheter and method for determining a position of the catheter within the cardiovascular system is provided. Local bending and twisting is measured at multiple locations along the catheter. By integrating the measurements, the position and orientation of the catheter is determined. Based on the catheter position information, the location and orientation of an ultrasound transducer array connected with the catheter is known. The imaging array position and orientation information may be used to assist a physician in determining the tissue structure or fluid being scanned and/or assist in the accurate generation of three-dimensional representations.

    摘要翻译： 提供了用于确定导管在心血管系统内的位置的导管和方法。 沿着导管的多个位置测量局部弯曲和扭转。 通过整合测量，确定导管的位置和取向。 基于导管位置信息，与导管连接的超声换能器阵列的位置和取向是已知的。 成像阵列位置和取向信息可以用于帮助医生确定正在扫描的组织结构或流体，和/或协助精确生成三维表示。

    Medical diagnostic ultrasound system and method for flow analysis
    94.
    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 diagnostic ultrasound transducer system and method for harmonic imaging
    95.
    发明授权
    Medical diagnostic ultrasound transducer system and method for harmonic imaging 有权
    医用诊断超声换能器系统及谐波成像方法

    公开(公告)号：US06409667B1

    公开(公告)日：2002-06-25

    申请号：US09511472

    申请日：2000-02-23

    申请人： John A. Hossack

    发明人： John A. Hossack

    IPC分类号： A61B800

    CPC分类号： A61B8/481 ,  B06B1/064 ,  G01S7/52025 ,  G01S7/52046 ,  G01S15/8909 ,  G01S15/895

    摘要： A transducer system and method for harmonic imaging is provided. At least one transducer element is provided. The transducer element comprises two stacked piezoelectric layers. Information from each of the layers is independently processed during one of a transmit event, a receive event, and both transmit and receive events. Information from the transducer element is provided to a filter. The filter isolates harmonic information for imaging. By providing a multi-layer transducer element with independent processing for each layer, a wide bandwidth transducer for harmonic imaging is provided. The null associated with most transducers at the second harmonic of a fundamental frequency is removed or lessened.

    摘要翻译： 提供了一种用于谐波成像的换能器系统和方法。 提供至少一个换能器元件。 换能器元件包括两个堆叠的压电层。 来自每个层的信息在发送事件，接收事件以及发送和接收事件之一中被独立地处理。 来自换能器元件的信息被提供给过滤器。 滤波器隔离成像的谐波信息。 通过为每层提供具有独立处理的多层换能器元件，提供用于谐波成像的宽带传感器。 与基频的二次谐波处的大多数换能器相关联的零点被去除或减小。

    Diagnostic medical ultrasound systems and methods utilizing estimation of 3-dimensional rigid body transformation
    98.
    发明授权
    Diagnostic medical ultrasound systems and methods utilizing estimation of 3-dimensional rigid body transformation 有权
    诊断医学超声系统和利用三维刚体变换估计的方法

    公开(公告)号：US06306091B1

    公开(公告)日：2001-10-23

    申请号：US09369824

    申请日：1999-08-06

    申请人： Thilaka S. Sumanaweera ,  John A. Hossack

    发明人： Thilaka S. Sumanaweera ,  John A. Hossack

    IPC分类号： A61B800

    CPC分类号： G01S7/52034 ,  A61B8/06 ,  A61B8/08 ,  A61B8/13 ,  A61B8/483 ,  A61B8/488 ,  G01S7/52023 ,  G01S15/8993 ,  Y10S128/916

    摘要： The use of transformations in ultrasound systems is disclosed. A first set of points in a first data set or a subset of a first data set is known to correspond to a second set of points in a second data set or a subset of a second data set. The point correspondence can be established using any number of techniques including speckle and/or feature correlation, speckle decorrelation time delays. Spectral broadening, power and spectral peak. A method for estimating the best fitting rigid body transformation that maps the first data set or a subset of the first data set to the second data set or a subset of the second data set is disclosed. This yields three dimensional ultrasonic data sets which preserves the shapes of object they represent.

    摘要翻译： 公开了在超声系统中使用变换。 已知第一数据集或第一数据集的子集中的第一组点对应于第二数据集中的第二组点或第二数据集的子集。 点对应可以使用包括斑点和/或特征相关性，斑点去相关时间延迟的任何数量的技术建立。 光谱扩展，功率和光谱峰值。 公开了一种用于估计将第一数据集或第一数据集的子集映射到第二数据集或第二数据集的子集的最佳拟合刚体变换的方法。 这产生三维超声数据集，其保留其表示的对象的形状。

    3-D diagnostic medical ultrasound imaging using a 1-D array
    99.
    发明授权
    3-D diagnostic medical ultrasound imaging using a 1-D array 有权
    使用1-D阵列的3-D诊断医学超声成像

    公开(公告)号：US06234968B1

    公开(公告)日：2001-05-22

    申请号：US09333823

    申请日：1999-06-15

    申请人： Thilaka S. Sumanaweera ,  Mirsaid Bolorforosh ,  John A. Hossack

    发明人： Thilaka S. Sumanaweera ,  Mirsaid Bolorforosh ,  John A. Hossack

    IPC分类号： A61B800

    CPC分类号： A61B8/483 ,  A61B8/06 ,  A61B8/08 ,  A61B8/13 ,  A61B8/14 ,  A61B8/488 ,  G01S7/52068 ,  G01S15/8936 ,  G01S15/8993

    摘要： A method and apparatus to collect a 3-D volume of data using a generic 1-D ultrasound transducer, without using special fixtures, such as position tracking hardware. A 3-D volume is generated by performing two data collecting sweeps, or alternatively, by collecting data from a plurality of locator planes (non-coplanar intersecting planes) and performing one data collecting sweep or rotation. Lines of intersection are determined from intersecting planes of 2-D data sets collected from the 1-D ultrasound transducer. The 2-D data sets are assembled into a 3-D data set and scan converted in a 3-D grid for display.

    摘要翻译： 一种使用通用的1-D超声换能器收集3-D体积的数据的方法和装置，而不使用特殊的固定装置，例如位置跟踪硬件。 通过执行两次数据采集扫描或者通过从多个定位平面（非共面相交平面）收集数据并执行一个数据采集扫描或旋转来产生3-D体积。 从1-D超声换能器收集的2-D数据集的相交平面确定相交线。 将2-D数据组合成3-D数据集，并以3-D网格进行扫描转换以进行显示。