-
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
CPC分类号： G01S15/8979 , G01N29/0609 , G01P5/244 , G01S15/8959 , G01S15/8961 , A61B8/06 , G01N2291/02836
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。
-
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
CPC分类号： G01S15/8961 , G01S15/8979 , G01S15/8988 , G01S7/52047 , A61B8/06
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。
-
3.发明授权Method and apparatus for pulsed doppler imaging using coded excitation on transmit and pulse compression on receive 失效用于脉冲多普勒成像的方法和装置，在接收时使用编码激励对发射和脉冲压缩
公开(公告)号：US5964706A
公开(公告)日：1999-10-12
申请号：US40968
申请日：1998-03-18
申请人： Larry Y. L. Mo , Richard Y. Chiao
发明人： Larry Y. L. Mo , Richard Y. Chiao
CPC分类号： G01S15/8906 , G01S7/52025 , A61B8/06 , G01S7/52066
摘要： A pulsed Doppler 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. In the case of a single coded transmit for each transmit focal position, the receive signals are compressed utilizing matched or mismatched filtering. In the case of a two or more coded transmits for each transmit focal position, the receive signals are compressed utilizing filtering coefficients which match the respective transmit codes during each firing. These techniques can be used to maximize Doppler sensitivity of a small but deep-lying sample volume. Alternatively, for a given transmit acoustic burst length and dosage, the sample volume can be reduced to achieve better spatial resolution without compromising sensitivity.
摘要翻译： 脉冲多普勒技术在接收时对发射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。 在针对每个发射焦点位置的单个编码发射的情况下，使用匹配或不匹配的滤波来压缩接收信号。 在针对每个发射焦点位置的两个或更多个编码的发射的情况下，利用在每个发射期间与相应发射码匹配的滤波系数来压缩接收信号。 这些技术可用于最大限度地提高小而深的样本体积的多普勒灵敏度。 或者，对于给定的传输声学突发长度和剂量，可以减小样本体积以在不影响灵敏度的情况下实现更好的空间分辨率。
-
4.发明授权
公开(公告)号：US6108572A
公开(公告)日：2000-08-22
申请号：US298814
申请日：1999-04-23
IPC分类号： G01N29/44 , A61B8/00 , A61B8/06 , A61B8/08 , G01N29/22 , G01P5/00 , G01P5/24 , G01S20060101 , G01S7/52 , G01S15/89
CPC分类号： G01S7/52038 , A61B8/06 , A61B8/13 , A61B8/481 , G01P5/001 , G01P5/244 , G01S7/52039 , G01S15/8959 , G01S15/8981 , G01S7/52046
摘要： A method and apparatus for performing harmonic imaging. Each transmit focal zone in the near-field is interrogated by two or more transmit firings of different phase, while each transmit focal zone in the far-field is interrogated by a single transmit firing. On receive, the respective near-field vectors are summed, thereby substantially canceling the fundamental signal components while isolating the (sub)-harmonic signal components. In the far-field, the single transmit firing has a fundamental frequency .function..sub.0. A filter isolates the signal component having a passband centered at a (sub)harmonic frequency, e.g., 2.function..sub.0. The near-field and far-field receive vectors at each scan angle are then stitched together to form a composite vector.
摘要翻译： 一种执行谐波成像的方法和装置。 近场中的每个发射聚焦区通过两个或更多个不同相位的发射发射进行询问，而远场中的每个发射聚焦区由单个发射发射询问。 在接收时，相应的近场矢量相加，从而基本上消除基本信号分量，同时隔离（次） - 和谐信号分量。 在远场中，单个发射发射具有基频f0。 滤波器将具有以（亚）谐波频率为中心的通带的信号分量隔离，例如2f0。 然后将每个扫描角度的近场和远场接收矢量缝合在一起以形成复合矢量。
-
公开(公告)号：US5549002A
公开(公告)日：1996-08-27
申请号：US272971
申请日：1994-07-01
CPC分类号： G01S15/8997 , G01N29/069 , G01N29/221 , G01S7/52079
摘要： A method for detecting and characterizing flaws in an object having an arbitrary-shaped geometry. The present invention uses a synthetic aperture focusing technique (SAFT) which enables maximum aperture imaging. Maximum aperture imaging is attained by determining whether a plurality of reconstruction points within an object are in the width of a transmitted ultrasonic sound wave.
摘要翻译： 一种用于检测和表征具有任意形几何形状的物体中的瑕疵的方法。 本发明使用能够进行最大光圈成像的合成孔径聚焦技术（SAFT）。 通过确定对象内的多个重建点是否处于发送的超声波的宽度来获得最大光圈成像。
-
6.发明授权Method and apparatus to enhance ultrasound contrast imaging using stepped-chirp waveforms 有权使用阶梯啁啾波形增强超声造影成像的方法和装置公开(公告)号：US06953434B2
公开(公告)日：2005-10-11
申请号：US10065180
申请日：2002-09-24
申请人： Xiaohui Hao , Satchi Panda , Steven C. Miller , Richard Y. Chiao
发明人： Xiaohui Hao , Satchi Panda , Steven C. Miller , Richard Y. Chiao
CPC分类号： A61B8/4281 , G01S7/52022 , G01S7/52039 , G01S15/895 , G01S15/8963
摘要： A method and apparatus in an ultrasound imaging system is disclosed that enhances the contrast-to-tissue ratio and signal-to-noise ratio of contrast imaging using stepped-chirp waveforms. The first waveform component is employed with a first frequency optimized to initiate the bubble dynamics and the second waveform component is employed with a second frequency optimized to produce an enhanced bubble nonlinear response. The first waveform component and the at least a second waveform component are transmitted as a single stepped-chirp transmit pulse. At least one of a center frequency, an amplitude, a starting phase, and a bandwidth of the waveform components are adjusted to generate the single stepped-chirp transmit pulse. A relative phase, a switch time, and a time delay between the waveform components are also adjusted for maximal enhancement of bubble nonlinear response.
摘要翻译： 公开了一种超声成像系统中的方法和装置，其增强了使用阶梯啁啾波形的对比度成像的对比度与组织比和信噪比。 第一波形分量被采用优化的第一频率以启动气泡动力学，并且第二波形分量被采用优化的第二频率以产生增强的气泡非线性响应。 第一波形分量和至少第二波形分量作为单个步进线性调频脉冲发送脉冲发送。 调整波形分量的中心频率，幅度，起始相位和带宽中的至少一个，以产生单个阶梯形啁啾发送脉冲。 波形分量之间的相对相位，开关时间和时间延迟也被调整以用于气泡非线性响应的最大增强。
-
7.发明授权Method and apparatus for harmonic tissue imaging and contrast imaging using coded transmission 有权使用编码传输的谐波组织成像和对比成像的方法和装置
公开(公告)号：US6050947A
公开(公告)日：2000-04-18
申请号：US224650
申请日：1998-12-31
CPC分类号： G01S7/52038 , A61B8/481 , G01S15/8959
摘要： A method and an apparatus for imaging the nonlinear components of an ultrasound signal returned from ultrasound scatterers in tissue or contrast agents in blood. The method employs a code-modulated wavelet for transmission combined with correlation filtering on reception. Coding methods are used to simultaneously manipulate the linear and nonlinear terms. The manipulations affect the magnitude and temporal arrangement of the resulting decoded waveforms. Among the simultaneous manipulations of linear and harmonic decoded signals are: orthogonal linear terms, finite linear terms, minimum sidelobe with optimal peak harmonic terms and optimally compressed harmonic terms.
摘要翻译： 一种用于对来自超声波散射体在血液中的组织或造影剂中返回的超声信号的非线性分量进行成像的方法和装置。 该方法采用编码调制小波进行传输，并结合接收相关滤波。 编码方法用于同时处理线性和非线性项。 操作影响所得到的解码波形的幅度和时间排列。 在线性和谐波解码信号的同时操作中有：正交线性项，有限线性项，具有最优峰值谐波项的最小旁瓣和最优压缩谐波项。
-
公开(公告)号：US5961463A
公开(公告)日：1999-10-05
申请号：US138636
申请日：1998-08-24
CPC分类号： G01S7/52025 , G01S15/8959 , G01S7/52038 , A61B8/06 , G01S15/8979
摘要： A method and an apparatus for imaging the nonlinear components of an ultrasound signal returned from ultrasound scatterers in tissue or contrast agents in blood. The method employs a code-modulated wavelet for transmission combined with correlation filtering on reception. Transmit codes are used to modulate the phases of wavelets for successive transmit firings focused at the same transmit focal position. For example, for a first transmit firing a first transmit code is used to modulate a base wavelet to form a first coded wavelet and for a second transmit firing a second transmit code is used to modulate the same base wavelet to form a second coded wavelet. On reception, the receive signals resulting from the first and second transmit firings are decoded by correlating the receive signals with first and second receive codes respectively. The transmit and receive codes satisfy the orthogonality condition that the sum of the correlation of the first transmit code with the first receive code and the correlation of the second transmit code with the second receive code equals zero. The combined transmission and reception operations will exactly cancel the linear echo component of the signal, leaving the nonlinear components for imaging.
摘要翻译： 一种用于对来自超声波散射体在血液中的组织或造影剂中返回的超声信号的非线性分量进行成像的方法和装置。 该方法采用编码调制小波进行传输，并结合接收相关滤波。 发射码用于调制聚焦在相同发射焦点位置的连续发射发射的小波相位。 例如，对于第一发射发射，使用第一发射码来调制基本小波以形成第一编码小波，并且对于第二发射发射，使用第二发射码来调制相同的基本小波以形成第二编码小波。 在接收时，通过分别将接收信号与第一和第二接收码相关联来解码由第一和第二发射发射产生的接收信号。 发送和接收码满足第一发射码与第一接收码的相关和第二发射码与第二接收码的相关性之和等于零的正交条件。 组合的发送和接收操作将完全消除信号的线性回波分量，留下用于成像的非线性分量。
-
公开(公告)号：US06893399B2
公开(公告)日：2005-05-17
申请号：US10400879
申请日：2003-03-27
CPC分类号： G01S7/52046 , A61B8/14
摘要： Certain embodiments include a system and method for banding suppression in a B-mode ultrasound image. Banding occurs in a diagnostic image when two or more focal regions having different waveforms and/or frequencies, for example, are combined. The resulting difference in intensity between the focal regions produces banding in the final image. For purposes of illustration only, the method below will be described with two focal zones. Certain embodiments of the present invention reduce banding in a diagnostic image including a plurality of focal zones by processing the first focal zone, determining intensity around the border or “stitch line” between the two focal regions, and adjusting the second focal region based on the difference in intensity. Preferably, processing is done in real time as image frames are updated.
摘要翻译： 某些实施例包括用于B模式超声图像中的带状抑制的系统和方法。 当具有不同波形和/或频率的两个或多个聚焦区域被组合时，在诊断图像中出现条带。 所产生的焦点区域之间的强度差异在最终图像中产生条纹。 仅为了说明的目的，将使用两个聚焦区域来描述以下方法。 本发明的某些实施例通过处理第一焦点区域来减少包括多个聚焦区域的诊断图像中的条带，确定两个聚焦区域之间的边界周围的强度或“缝合线”，并且基于 强度差异。 优选地，当更新图像帧时，实时地进行处理。
-
10.发明授权Method and apparatus for three-dimensional ultrasound imaging using transducer array having uniform elevation beamwidth 失效使用具有均匀的仰角波束宽度的换能器阵列的三维超声成像的方法和装置
公开(公告)号：US5840032A
公开(公告)日：1998-11-24
申请号：US852264
申请日：1997-05-07
CPC分类号： G01S7/52034 , A61B8/06 , A61B8/13 , G01N29/0609 , G01N29/0645 , G01S15/50 , G01S15/8925 , G01S15/8988 , G01S15/8993 , G01S7/52085 , H04N13/0003 , H04N13/0037 , H04N13/0055 , H04N13/04 , Y10S128/916
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. In particular, the multi-row transducer array has a central row made up of elements having an area smaller than the combined area of the paired elements of two outermost rows 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.
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。 特别地，多行换能器阵列具有由具有小于两个最外面行的成对元件的组合面积的元素组成的中心行。来自对于多个存储的切片中的每一个的相关感兴趣区域的数据是 发送到主控制器，这样的数据形成一个感兴趣的体积。 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。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.021 秒)