公开(公告)号：US06895123B2

公开(公告)日：2005-05-17

申请号：US10035144

申请日：2002-01-04

申请人： Pai-Chi Li ,  Jing-Jung Huang ,  Shue-E Chen ,  You-Ling Gau ,  Tzu-Yin Chu

发明人： Pai-Chi Li ,  Jing-Jung Huang ,  Shue-E Chen ,  You-Ling Gau ,  Tzu-Yin Chu

IPC分类号： G01S7/52 ,  G10K11/34 ,  G06K9/40

CPC分类号： G10K11/346 ,  G01S7/52025 ,  G01S7/52034 ,  G01S7/52046

摘要： Disclosed is focus control method for Delta-Sigma based image formation devices in which a steering term and a focusing term of a delay formula are respectively quantized, and corresponding two channels at both sides of the probe are synchronized by a delay produced during dynamic focusing. During synchronizing the two channels, two numeral values with equal absolute value but with opposite signs are respectively inserted so as to eliminate extra noise the signals are after summing up, and controlling common delay of the two channels is performed by same one controller. After summing up the inserted two values, the dynamic aperture control of the Delta-Sigma based image formation device can be effectively realized and noise during dynamic focusing also is eliminated thereby achieving an ideal single bit output.

摘要翻译： 公开了用于基于Delta-Sigma的图像形成装置的焦点控制方法，其中分别量化了延迟公式的转向项和聚焦项，并且在动态聚焦期间产生的延迟使探针两侧的对应的两个通道同步。 在同步两个通道期间，分别插入两个相等绝对值但具有相反符号的数字值，以消除信号在求和之后的额外噪声，同时控制两个通道的共同延迟。 在总结插入的两个值之后，可以有效地实现基于Delta-Sigma的图像形成装置的动态孔径控制，并且消除动态聚焦期间的噪声，从而实现理想的单位输出。

公开(公告)号：US06582369B1

公开(公告)日：2003-06-24

申请号：US10037100

申请日：2002-01-02

申请人： Jing-Jung Huang ,  Pai-Chi Li

发明人： Jing-Jung Huang ,  Pai-Chi Li

IPC分类号： A61B800

CPC分类号： G10K11/346

摘要： Methods perform dynamic focusing of a coherent array imaging system are invented. Dynamic focusing in ultrasonic array imaging involves extensive real-time computations and data communication. Particularly for real-time three-dimensional imaging using fully-sampled two-dimensional arrays, implementation of dynamic focusing can be extremely complicated. The invention described in this disclosure greatly simplifies the delay control mechanism by exploiting both spatial and temporal characteristics of the focusing delay patterns. The simplification primarily results from (1) grouping adjacent channels into sub-apertures for the range dependent focusing component, and (2) non-uniform quantization of the delay values.

摘要翻译： 发明了一种相干阵列成像系统的动态聚焦方法。 超声波阵列成像中的动态聚焦涉及广泛的实时计算和数据通信。 特别是对于使用全采样二维阵列的实时三维成像，动态聚焦的实现可能非常复杂。 在本公开中描述的本发明通过利用聚焦延迟图案的空间和时间特性大大简化了延迟控制机制。 简化主要来自（1）将相邻信道分组成用于范围相关聚焦分量的子孔径，以及（2）延迟值的非均匀量化。

公开(公告)号：US20070034011A1

公开(公告)日：2007-02-15

申请号：US11187875

申请日：2005-07-25

申请人： Pai-Chi Li

发明人： Pai-Chi Li

IPC分类号： A61B8/00 ,  G01N29/04

CPC分类号： G01N29/262 ,  G01N29/0609 ,  G01N2291/044 ,  G01S15/8922 ,  G01S15/8925 ,  G10K11/346

摘要： A dynamic focusing apparatus and method for ultrasonic imaging, using transducer frequency encoding technique to map different positions of the surface of a transducer to different frequency responses. To a particular focal position, the time delay required for focusing from various positions on the transducer surface to the focal point can be calculated. By combining frequency responses and time delays that correspond to different transducer positions, a single transmit waveform can be used to drive the transducer and to realize focusing similar to that of an array imaging system. Similar principles can be applied to dynamic focusing at the receive end. A filter can be used to select particular positions on a transducer surface. The received signal extracted in this manner can also be time delayed for focusing. By combining all filters that correspond to different transducer positions, dynamic receive focusing can be implemented using a single position dependent filter.

摘要翻译： 一种用于超声波成像的动态聚焦装置和方法，使用换能器频率编码技术将换能器表面的不同位置映射到不同的频率响应。 对于特定的焦点位置，可以计算从换能器表面上的各个位置聚焦到焦点所需的时间延迟。 通过组合对应于不同传感器位置的频率响应和时间延迟，可以使用单个发射波形来驱动换能器并实现类似于阵列成像系统的聚焦。 类似的原理可以应用于接收端的动态聚焦。 滤波器可用于选择换能器表面上的特定位置。 以这种方式提取的接收信号也可以被时间延迟用于聚焦。 通过组合对应于不同传感器位置的所有滤波器，可以使用单个位置相关滤波器来实现动态接收聚焦。

公开(公告)号：US6023977A

公开(公告)日：2000-02-15

申请号：US61082

申请日：1998-04-15

申请人： Donald R. Langdon ,  Gregory L. Holley ,  John A. Hossack ,  Pai-Chi Li

发明人： Donald R. Langdon ,  Gregory L. Holley ,  John A. Hossack ,  Pai-Chi Li

IPC分类号： G01N29/06 ,  G01N29/34 ,  G01N29/42 ,  G01S7/52 ,  G01S15/89 ,  G01N29/00 ,  G01S15/00

CPC分类号： G01S15/895 ,  G01N29/06 ,  G01N29/348 ,  G01N29/42 ,  G01S15/8963 ,  G01S7/52038 ,  G01S7/52049 ,  G01S7/52095 ,  G01S7/52066 ,  G01S7/52071

摘要： An ultrasonic imaging system including an aberration correction system uses a harmonic component of the fundamental transmitted frequency for imaging, or for aberration correction, or both. By properly selecting the frequency pass bands of filters used in the image signal path and in the aberration correction signal path operating advantages are provided. The aberration correction values may be calculated concurrently with image formation.

公开(公告)号：US20110044516A1

公开(公告)日：2011-02-24

申请号：US12545085

申请日：2009-08-21

申请人： Pai-Chi Li ,  Chen-Wei Wei

发明人： Pai-Chi Li ,  Chen-Wei Wei

IPC分类号： G06K9/00

CPC分类号： G06T5/009 ,  G06T5/50 ,  G06T2207/20221

摘要： A contrast improvement method and system for photoacoustic imaging decomposes a photoacoustic image into a plurality of subband images using a set of filters, and integrates the subband images to form an integrated image. The subband images may be pseudo colored and weighted to improve contrast of the photoacoustic image.

摘要翻译： 用于光声成像的对比度改进方法和系统使用一组滤波器将光声图像分解成多个子带图像，并且对子带图像进行积分以形成集成图像。 子带图像可以是伪着色和加权的，以改善光声图像的对比度。

公开(公告)号：US07744532B2

公开(公告)日：2010-06-29

申请号：US10814959

申请日：2004-03-31

申请人： Kutay F. Ustuner ,  Pai-Chi Li ,  Meng-Lin Li ,  Tom L. Thomas ,  Albert Gee

发明人： Kutay F. Ustuner ,  Pai-Chi Li ,  Meng-Lin Li ,  Tom L. Thomas ,  Albert Gee

IPC分类号： A61B5/05

CPC分类号： G01S15/8927 ,  G01S7/52049

摘要： Ultrasound imaging adapts as a function of a coherence factor. Various beamforming, image forming or image processing parameters are varied as a function of a coherence factor to improve detail resolution, contrast resolution, dynamic range or SNR. For example, a beamforming parameter such as the transmit or receive aperture size, apodization type or delay is selected to provide maximum coherence. Alternatively or additionally, an image forming parameter, such as the number of beams for coherent synthesis or incoherent compounding, is set as a function of the coherence factor. Alternatively or additionally an image processing parameter such as the dynamic range, linear or nonlinear video filter and/or linear or nonlinear map may also adapt as a function of the coherence factor.

摘要翻译： 超声成像适应相干因子的函数。 各种波束成形，图像形成或图像处理参数作为相干因子的函数而变化，以提高细节分辨率，对比度分辨率，动态范围或SNR。 例如，选择诸如发射或接收孔径大小，变迹类型或延迟的波束成形参数以提供最大相干性。 或者或另外，将诸如用于相干合成或非相干复合的光束的数量的图像形成参数设置为相干因子的函数。 替代地或附加地，诸如动态范围，线性或非线性视频滤波器和/或线性或非线性映射的图像处理参数也可以作为相干因子的函数来适应。

公开(公告)号：US20120192650A1

公开(公告)日：2012-08-02

申请号：US13355476

申请日：2012-01-20

申请人： Ming-Chia Tsai ,  An-Yeu Wu ,  Pai-Chi Li ,  Cheng-Zhou Chan ,  Yu-Hao Chen

发明人： Ming-Chia Tsai ,  An-Yeu Wu ,  Pai-Chi Li ,  Cheng-Zhou Chan ,  Yu-Hao Chen

IPC分类号： G01N29/04 ,  G01N29/44

CPC分类号： G01S7/52047 ,  G01S15/8915

摘要： A signal processing method is adapted for dealing with a plurality of vector matrixes to detect the image of a predetermined range, and the vector matrix data are generated by reflecting a plurality of ultrasonic beams in the predetermined range. The signal processing method of the present invention is that summing all vector matrix data in a predetermined time interval so as to generate a total correlation matrix. In addition, obtaining a correlation matrix through the total vector matrix multiplied by a transposed total vector matrix, and obtaining a weight value according to inversion correlation matrix. Then, a weighting operation is performed for the vector matrix data in the predetermined time interval according to the weight value, so as to obtain a weighting operation result for performing an image synthesis procedure.

摘要翻译： 信号处理方法适于处理多个向量矩阵以检测预定范围的图像，并且通过将多个超声波束反射到预定范围来生成矢量矩阵数据。 本发明的信号处理方法是将预定时间间隔内的所有矢量矩阵数据相加，以产生总相关矩阵。 另外，通过乘以转置的总矢量矩阵的总矢量矩阵获得相关矩阵，并且根据反相关矩阵获得权重值。 然后，根据权重值对预定时间间隔内的向量矩阵数据进行加权操作，以获得用于执行图像合成过程的加权运算结果。

公开(公告)号：US06517486B1

公开(公告)日：2003-02-11

申请号：US09930931

申请日：2001-08-16

申请人： Pai-Chi Li

发明人： Pai-Chi Li

IPC分类号： A61B800

CPC分类号： G01S15/8977 ,  A61B8/00 ,  G01S7/52077 ,  G01S15/8995

摘要： A compounding method for reducing speckle noise applied in an ultrasound imaging apparatus is disclosed. The compounding method includes the steps of providing an object, measuring the object for obtaining a reference image by the ultrasound imaging apparatus, applying an external force to the object to deform the object, measuring the deformed object for obtaining an deformed object image at the same position, estimating an in-plane displacement field of the deformed object image for correcting an in-plane motion of the object to obtain a corrected image, and compounding the reference image with the corrected image to obtain a compounded image of the object for achieving the speckle noise reduction.

摘要翻译： 公开了一种用于减少在超声成像设备中施加的斑点噪声的复合方法。 复合方法包括以下步骤：提供对象，通过超声成像设备测量对象以获得参考图像，向对象施加外力以使物体变形，测量变形物体以获得相同的变形物体图像 位置，估计所述变形对象图像的面内位移场，用于校正所述对象的面内运动以获得校正图像，以及将所述参考图像与所述校正图像进行复合，以获得所述对象的复合图像，以实现所述对象 散斑降噪。

公开(公告)号：US20120294518A1

公开(公告)日：2012-11-22

申请号：US13557202

申请日：2012-07-24

申请人： Pai-Chi Li ,  Chen-Wei Wei

发明人： Pai-Chi Li ,  Chen-Wei Wei

IPC分类号： G06K9/40 ,  G06K9/00 ,  G06K9/36

CPC分类号： G06T5/009 ,  G01N21/1702 ,  G06T5/50 ,  G06T2207/20221

摘要： A contrast improvement method and system for photoacoustic imaging decomposes a photoacoustic image into a plurality of subband images using a set of filters, and integrates the subband images to form an integrated image. The subband images may be pseudo colored and weighted to improve contrast of the photoacoustic image.

摘要翻译： 用于光声成像的对比度改进方法和系统使用一组滤波器将光声图像分解成多个子带图像，并且对子带图像进行积分以形成集成图像。 子带图像可以是伪着色和加权的，以改善光声图像的对比度。

公开(公告)号：US20110301458A1

公开(公告)日：2011-12-08

申请号：US12844533

申请日：2010-07-27

申请人： Pai-Chi Li ,  Bao-Yu Hsieh

发明人： Pai-Chi Li ,  Bao-Yu Hsieh

IPC分类号： A61B8/00

CPC分类号： A61B8/12 ,  A61B5/0095 ,  A61B5/02007 ,  A61B8/0891 ,  A61B8/445 ,  A61B8/4477

摘要： An imaging probe is suitable to be inserted into a tubular object so as to detect an interior image of the tubular object. The imaging probe includes a light source excitation assembly, an ultrasonic transducer and a receiver. The light source excitation assembly includes a pulsed laser, a first optical fiber and a cone-shaped reflecting member. The pulsed laser is suitable to generate a pulsed light energy. The cone-shaped reflecting member is suitable to reflect the pulsed light energy to let the pulsed light energy annularly irradiate the inner wall of the tubular object so as to produce a photoacoustic signal. The ultrasonic transducer is suitable to generate an ultrasonic signal. The ultrasonic signal annularly irradiates the inner wall of the tubular object so as to produce an ultrasonic echo signal. The receiver receives the photoacoustic signal and the ultrasonic echo signal.

摘要翻译： 成像探针适于插入管状物体中，以便检测管状物体的内部图像。 成像探针包括光源激发组件，超声波换能器和接收器。 光源激发组件包括脉冲激光器，第一光纤和锥形反射部件。 脉冲激光适用于产生脉冲光能。 锥形反射构件适于反射脉冲光能，以使脉冲光能量环形地照射管状物体的内壁，从而产生光声信号。 超声波换能器适用于产生超声信号。 超声波信号环状照射管状物体的内壁，产生超声回波信号。 接收器接收光声信号和超声回波信号。