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1. 发明授权

US06491634B1 Sub-beamforming apparatus and method for a portable ultrasound imaging system 有权
标题翻译：用于便携式超声成像系统的子波束成形装置和方法
公开(公告)号：US06491634B1
公开(公告)日：2002-12-10
申请号：US09687252
申请日：2000-10-13
申请人： Steven C Leavitt , Bernard J Savord , Benjamin M Herrick , Joseph R Fallon , Matthew Mooney
发明人： Steven C Leavitt , Bernard J Savord , Benjamin M Herrick , Joseph R Fallon , Matthew Mooney
IPC分类号： A61B800
CPC分类号： G01S7/5208 , A61B8/4427 , G01N29/06 , G01N29/262 , G01S15/8927 , G10K11/346
摘要： A sub-beamforming method and apparatus are applied to a portable, one-dimensional ultrasonic imaging system. The sub-beamforming circuitry may be included in the probe s assembly housing the ultrasonic transducer, thus minimizing the number of signals that are communicated between the probe assembly and the portable processor included in the imaging system. Including the sub-beamformer in the probe assembly also relieves the portable processor of some of the signal processing tasks. The sub-beamforming apparatus may be implemented digitally or may be implemented using analog components.
摘要翻译：子波束形成方法和装置应用于便携式一维超声成像系统。子波束形成电路可以包括在容纳超声波换能器的探针组件中，从而最小化在探针组件和包括在成像系统中的便携式处理器之间传递的信号的数量。在探头组件中包括子波束形成器也可以使便携式处理器免除一些信号处理任务。子波束形成装置可以数字地实现，或者可以使用模拟部件来实现。

2. 发明授权

US5063931A Method and apparatus for signal dependent gain control 失效
标题翻译：用于信号相关增益控制的方法和装置
公开(公告)号：US5063931A
公开(公告)日：1991-11-12
申请号：US609312
申请日：1990-11-05
申请人： Steven C. Leavitt
发明人： Steven C. Leavitt
IPC分类号： A61B8/06 , G01P5/00 , G01S15/89
CPC分类号： G01S15/8979 , A61B8/06 , Y10S73/90
摘要： A method and apparatus are provided for gain control in a Doppler or other scan system which projects a plurality of scan lines at a given angle to determine velocity of movement of a predetermined medium at the angle. A training line is generated at the angle of the scan lines, the training line being utilized to determine portions of the scan line which are in a flow medium of interest, such as blood, and portions of the scan line which are in clutter. Information from the training line is then utilized to control the gain of the scan lines so that the gain is substantially maximized when scan lines are in the flow medium, while being reduced so as not to saturate the system in general, and A/D converters in particular, when in clutter. When an image line is utilized in the system, this line may also function as the training line.

3. 发明授权

US06370264B1 Method and apparatus for ultrasonic color flow imaging 失效
标题翻译：超声波彩色成像的方法和装置
公开(公告)号：US06370264B1
公开(公告)日：2002-04-09
申请号：US09287980
申请日：1999-04-07
申请人： Steven C Leavitt
发明人： Steven C Leavitt
IPC分类号： G06K900
CPC分类号： G06T7/20 , A61B5/029 , A61B5/7232 , A61B8/065 , G06T5/20 , G06T7/0012 , G06T7/11 , G06T2207/10132 , G06T2207/30048
摘要： A flow velocity processor for use in a color flow imaging system having reduced dynamic range requirements with an improved segmentation scan conversion on a pixel by pixel decision using velocity data derived from an autocorrelation vector after conversion to a unit vector, a compressed magnitude of the autocorrelation vector, and the two dimensional magnitude information. An autocorrelation vector processor generates autocorrelation vectors between pairs of N complex samples of at least one set of complex samples, each autocorrelation vector having amplitude and phase information. A unit vector convertor generates a corresponding unity amplitude autocorrelation vector for each processed input set of N complex samples, the phase of each unit amplitude autocorrelation vector being the same as the resultant autocorrelation vector, and the two components of the unit amplitude autocorrelation vector are used for subsequent calculation of the velocity and segmentation into a final color flow image. An autocorrelation vector magnitude information processing path may extract the amplitude component of each autocorrelation vector, generating compressed autocorrelation vector amplitude information for generation of a segmented image and a two dimensional image data processing path may extract two dimensional image data for the generation of a final segmented image. A scan convertor translates polar space data resampled rectangular space data and the two components of the unit vector are converted to a velocity value and, along with the compressed amplitude data and the two dimensional data, are ready for segmentation to generate the final display image.
摘要翻译：一种用于彩色流成像系统的流速处理器，其具有减小的动态范围要求，并且利用从转换为单位向量后的自相关向量导出的速度数据逐像素判定改进的分割扫描转换，自相关的压缩幅度矢量和二维幅度信息。自相关向量处理器在至少一组复样本集合的N个复样本的对之间生成自相关向量，每个自相关向量具有振幅和相位信息。单位向量转换器对于N个复样本的每个处理的输入集合生成相应的单位幅度自相关矢量，每个单位幅度自相关矢量的相位与所得的自相关矢量相同，并且使用单位幅度自相关矢量的两个分量用于随后计算速度并将其分割成最终的彩色流图像。自相关矢量幅度信息处理路径可以提取每个自相关矢量的幅度分量，产生用于生成分割图像的压缩自相关矢量幅度信息，并且二维图像数据处理路径可以提取用于生成最终分割的图像数据的二维图像数据图片。扫描转换器将极坐标空间数据重新采样的矩形空间数据进行转换，将单位向量的两个分量转换为速度值，并与压缩的幅度数据和二维数据一起准备好进行分割以生成最终的显示图像。

4. 发明授权

US4471449A Scan converter system 失效
标题翻译：扫描转换器系统
公开(公告)号：US4471449A
公开(公告)日：1984-09-11
申请号：US317081
申请日：1981-11-02
申请人： Steven C. Leavitt , Hugh G. Larsen , Barry F. Hunt
发明人： Steven C. Leavitt , Hugh G. Larsen , Barry F. Hunt
IPC分类号： G01S7/52 , G01S7/531 , G06T11/00 , G06F15/20 , H04N5/02
CPC分类号： G01S7/52044 , G06T11/203
摘要： Apparatus for interpolating data along radial lines so that it can be displayed at display points arranged in orthogonal rows and columns by recursively adding stored values to derive signals indicative of the radial position of each display point along the radial data lines and its angular position between the radial data lines. Interpolation is done along each radial line to derive first and second intermediate interpolated values, and these values are interpolated so as to derive the final data value for the display point at its angular position. Alternatively, the intermediate interpolated values can be attained by angular interpolation and the final data value by radial interpolation.
摘要翻译：用于沿着径向线插入数据的装置，使得其可以在以正交行和列排列的显示点处被显示，通过递归地添加存储的值以导出指示每个显示点沿着径向数据线的径向位置的信号，以及它们之间的角位置径向数据线。沿着每个径向线进行插值以导出第一和第二中间插值，并且对这些值进行内插，以便在其角位置导出显示点的最终数据值。或者，可以通过角插值和通过径向内插的最终数据值来获得中间内插值。

5. 发明授权

US4850364A Medical ultrasound imaging system with velocity-dependent rejection filtering 失效
标题翻译：医学超声成像系统与速度相关的拒绝滤波
公开(公告)号：US4850364A
公开(公告)日：1989-07-25
申请号：US119754
申请日：1987-11-12
申请人： Steven C. Leavitt
发明人： Steven C. Leavitt
IPC分类号： G01P5/00 , A61B8/06 , G01F1/66 , G01S15/89
CPC分类号： G01S15/8981
摘要： A medical Doppler ultrasound imaging system with improved filtering to separate blood flow information from clutter due to heart wall and vessel motion. In combination with a clutter rejection filter and velocity determination system as in the prior art, a velocity sample rejection system implements a velocity-dependent (i.e., frequency-dependent) threshold for rejecting velocity values, or samples, based on too weak echoes. That is, the acceptance/rejection threshold is a function of frequency. Optimally, the shape of the velocity-dependent thresholding function closely matches that of the attenuation transfer function of the clutter rejection filter. Thuys, for low velocity samples (corresponding to low Doppler frequency shifts), the rejection threshold is substantially lower than it is for high velocity samples. The rejection level increases monotonically as the signal deviates from the I.F.

6. 发明授权

US4750145A Doppler AGC using overflow counters internal to FFT 失效
标题翻译：多普勒AGC使用FFT内部的溢出计数器
公开(公告)号：US4750145A
公开(公告)日：1988-06-07
申请号：US9656
申请日：1987-01-28
申请人： Steven C. Leavitt
发明人： Steven C. Leavitt
IPC分类号： G01S7/52 , G01S15/89 , G06F17/14 , G06F15/332
CPC分类号： G06F17/142 , G01S7/52033 , G01S15/8979
摘要： Apparatus for controlling the amplitude of a signal applied to an FFT system in accordance with the overflows occurring in the various butterfly operations.
摘要翻译：用于根据在各种蝶形操作中发生的溢出来控制施加到FFT系统的信号幅度的装置。

7. 发明授权

US06540682B1 Portable, configurable and scalable ultrasound imaging system 有权
标题翻译：便携式，可配置和可扩展的超声成像系统
公开(公告)号：US06540682B1
公开(公告)日：2003-04-01
申请号：US09710985
申请日：2000-11-09
申请人： Steven C Leavitt , Joseph R Fallon , Michael P Anthony , Theodore P Fazioli , Charles R Dowdell
发明人： Steven C Leavitt , Joseph R Fallon , Michael P Anthony , Theodore P Fazioli , Charles R Dowdell
IPC分类号： A61B800
CPC分类号： G01S15/899 , A61B8/4427 , G01S7/52033 , G01S7/52044 , G01S7/52073 , G01S15/8909 , G01S15/8979
摘要： A portable, configurable and scalable ultrasonic imaging system uses a phased ultrasonic transducer array coupled to a portable, configurable and scalable ultrasonic processor to develop ultrasonic images. When used in conjunction with a sector phased array, the portable, configurable and scalable ultrasonic imaging system uses a processing channel associated with each element in the transducer array to develop the ultrasonic image. When used with a linear or curved linear transducer array, the portable, configurable and scalable ultrasonic processor uses fewer processing channels than transducer elements to develop the ultrasonic image. Since the portable, configurable and scalable ultrasonic processor is scalable, it is able to use a variety of processors, software and transducer arrays to develop a number of different ultrasonic output images. The portable, configurable and scalable ultrasound imaging system includes a scalable architecture and includes alternative software configurable imaging applications and operating modes, and includes modifiable processing algorithms and operating features.
摘要翻译：便携式，可配置和可扩展的超声成像系统使用耦合到便携式，可配置和可扩展的超声波处理器的相位超声换能器阵列来开发超声波图像。当与扇区相控阵列一起使用时，便携式，可配置和可扩展的超声成像系统使用与换能器阵列中的每个元件相关联的处理通道来开发超声波图像。当与线性或弯曲线性换能器阵列一起使用时，便携式，可配置和可扩展的超声波处理器使用比换能器元件更少的处理通道来开发超声波图像。由于便携式，可配置和可扩展的超声波处理器是可扩展的，因此能够使用各种处理器，软件和换能器阵列来开发许多不同的超声波输出图像。便携式，可配置和可扩展的超声成像系统包括可扩展架构，并且包括可替代的软件可配置成像应用和操作模式，并且包括可修改的处理算法和操作特征。

8. 发明授权

US5197037A Method and apparatus for the simultaneous performance of the beam formation and scan conversion in a phased array system 失效
标题翻译：用于在相控阵系统中同时执行光束形成和扫描转换的方法和装置
公开(公告)号：US5197037A
公开(公告)日：1993-03-23
申请号：US785669
申请日：1991-10-31
申请人： Steven C. Leavitt
发明人： Steven C. Leavitt
IPC分类号： A61B8/00 , G01N29/44 , G01S7/531 , G10K11/34
CPC分类号： G10K11/345 , G01S7/52044
摘要： A method and apparatus are provided for utilizing a digital front end in a phased array system such as an ultrasonic scanning system to simultaneously perform both digital beam formation and scan conversion. Echo signals from each of the N channels of the array aperture are sampled at selected points along returning echo signals. The samples are preferably used to determine a value for each channel for each pixel utilized in the display by, for example, determining a transmit time for such point. The values for each pixel for the N channels are then summed to obtain the value for the pixel. Alternatively, the samples may be taken at uniform intervals along each channel line and the sample values interpolated to obtain values at Y-boundary crossings or sampling may be taken at times determined so that each sample is at a Y-boundary crossing. The Y-boundary crossing sample values are stored and are then summed to obtain coherently enhanced sample values at the crossings. The sample values at the Y-boundary crossings may then be interpolated or otherwise utilized to obtain sample values for display pixels.

9. 发明授权

US4790323A Flow imaging detector 失效
标题翻译：流量成像检测器
公开(公告)号：US4790323A
公开(公告)日：1988-12-13
申请号：US926078
申请日：1986-11-03
申请人： Steven C. Leavitt , David Lipschutz , Stephen E. Lincoln , Karl Thiele , Paul A. Magnin
发明人： Steven C. Leavitt , David Lipschutz , Stephen E. Lincoln , Karl Thiele , Paul A. Magnin
IPC分类号： G01P5/00 , A61B8/06 , G01P5/24 , G01S15/58 , A61B10/00
CPC分类号： G01P5/244 , G01S15/582
摘要： Estimates of the average velocity and turbulence of blood flow are determined by weighting the instantaneous frequencies of a returning Doppler signal. The weighting can be chosen so that the estimates are optimized. The weighting can be chosen so as to duplicate the algorithm of other ultrasound flow imaging systems.
摘要翻译：通过对返回的多普勒信号的瞬时频率进行加权来确定血流的平均速度和湍流的估计。可以选择加权，以便优化估计。可以选择加权以复制其他超声波流动成像系统的算法。

10. 发明授权

US4468747A Scan converter system 失效
标题翻译：扫描转换器系统
公开(公告)号：US4468747A
公开(公告)日：1984-08-28
申请号：US340663
申请日：1982-01-19
申请人： Steven C. Leavitt , Hugh G. Larsen , Barry F. Hunt
发明人： Steven C. Leavitt , Hugh G. Larsen , Barry F. Hunt
IPC分类号： G01S7/52 , G01S7/531 , G06T11/00 , G06F15/20 , H04N5/02
CPC分类号： G01S7/531 , G01S7/52063 , G06T1/00 , G06T3/4007
摘要： Apparatus for displaying the information represented by data samples occurring along radial lines at display points arranged in rows and columns wherein intermediate interpolated data values are derived at the intersections of a row containing a display point for which a final data value is sought with radii on either side of the display point and interpolating the first and second intermediate interpolated data values so as to derive a final interpolated data value at the angular position of the display point with respect to the radii.
摘要翻译：用于显示沿着径向线发生的数据样本所表示的信息的装置，其以排和列排列的显示点出现，其中在包含要寻求最终数据值的显示点的行的交点处导出中间内插数据值，并且内插第一和第二中间内插数据值，以便在显示点相对于半径的角位置导出最终内插数据值。

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