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1. 发明授权

US08475380B2 Reduction of multiline artifacts in doppler imaging 有权
标题翻译：在多普勒成像中减少多行伪影
公开(公告)号：US08475380B2
公开(公告)日：2013-07-02
申请号：US12550803
申请日：2009-08-31
申请人： Kjell Kristoffersen , Hans Torp , Tore Gruner Bjastad , Lasse Lovstakken , Torbjorn Hergum , Johan Kirkhorn
发明人： Kjell Kristoffersen , Hans Torp , Tore Gruner Bjastad , Lasse Lovstakken , Torbjorn Hergum , Johan Kirkhorn
IPC分类号： A61B8/00
CPC分类号： G01S7/52077 , A61B8/06 , A61B8/08 , G01S7/52095 , G01S15/8977 , G01S15/8979 , G01S15/8993
摘要： Certain embodiments of the present technology provide systems and methods that provide reduction of multiline artifacts in Doppler imaging. Certain embodiments provide for various ensembles of transmit beams at different spatial locations and overlapping receive beams between the locations. Certain embodiments provide for calculating various auto-correlation estimates based on the received beams and then combining the auto-correlation estimates to create an image. In certain embodiments, combining the auto-correlation estimates comprises applying a linear interpolation filter that decreases the weight applied for receive beams that are spatially located further away from the transmit beam.
摘要翻译：本技术的某些实施例提供了在多普勒成像中提供多线性伪像的减少的系统和方法。某些实施例提供了在不同空间位置处的发射波束的各种集合以及位置之间的重叠的接收波束。某些实施例提供了基于所接收的波束来计算各种自相关估计，然后组合自相关估计来创建图像。在某些实施例中，组合自相关估计包括应用线性内插滤波器，该线性内插滤波器降低施加于空间上位于远离发射波束的接收波束的权重。

2. 发明申请

US20110054316A1 Reduction of Multiline Artifacts in Doppler Imaging 有权
标题翻译：减少多普勒成像中的多种人造物
公开(公告)号：US20110054316A1
公开(公告)日：2011-03-03
申请号：US12550803
申请日：2009-08-31
申请人： Kjell Kristoffersen , Hans Torp , Tore Grüner Bjastad , Lasse Lovstakken , Torbjorn Hergum , Johan Kirkhorn
发明人： Kjell Kristoffersen , Hans Torp , Tore Grüner Bjastad , Lasse Lovstakken , Torbjorn Hergum , Johan Kirkhorn
IPC分类号： A61B8/00
CPC分类号： G01S7/52077 , A61B8/06 , A61B8/08 , G01S7/52095 , G01S15/8977 , G01S15/8979 , G01S15/8993
摘要： Certain embodiments of the present technology provide systems and methods that provide reduction of multiline artifacts in Doppler imaging. Certain embodiments provide for various ensembles of transmit beams at different spatial locations and overlapping receive beams between the locations. Certain embodiments provide for calculating various auto-correlation estimates based on the received beams and then combining the auto-correlation estimates to create an image. In certain embodiments, combining the auto-correlation estimates comprises applying a linear interpolation filter that decreases the weight applied for receive beams that are spatially located further away from the transmit beam.
摘要翻译：本技术的某些实施例提供了在多普勒成像中提供多线性伪像的减少的系统和方法。某些实施例提供了在不同空间位置处的发射波束的各种集合以及位置之间的重叠的接收波束。某些实施例提供了基于所接收的波束来计算各种自相关估计，然后组合自相关估计来创建图像。在某些实施例中，组合自相关估计包括应用线性内插滤波器，该线性内插滤波器降低施加于空间上位于远离发射波束的接收波束的权重。

3. 发明授权

US5662115A Method for determining the velocity-time spectrum of blood flow 失效
标题翻译：确定血流速度 - 时间谱的方法
公开(公告)号：US5662115A
公开(公告)日：1997-09-02
申请号：US479528
申请日：1995-06-07
申请人： Hans Torp , Kjell Kristoffersen
发明人： Hans Torp , Kjell Kristoffersen
IPC分类号： G01P5/00 , A61B8/06 , G01S15/89
CPC分类号： G01S15/8979
摘要： Method for determining the velocity-time spectrum of blood flow in a living body by means of an ultrasonic pulsed wave Doppler system, comprising:sequential transmission of pulsed ultrasonic waves and receiving a corresponding sequence of echo signals,sampling the received echo signals at one or more predetermined time delays after transmitted ultrasonic pulses, andprocessing said sequence of echo signal samples by frequency spectrum analysis to obtain a blood velocity spectrum comprising a number of velocity components within a range of expected blood velocity values, andrepeating said processing a plurality of times to obtain a velocity-time spectrum for substantially real-time display.For each velocity component in said blood velocity spectrum the received echo signals are sampled with subsequent increase or decrease in said predetermined delay after pulse transmission according to the change in round-trip time of the ultrasonic pulses reflected from blood moving with a velocity corresponding to each said velocity component. The resulting sequence of signal samples is processed to obtain said velocity component.
摘要翻译：用于通过超声脉冲波多普勒系统确定生物体中血流速度 - 时间谱的方法，包括：顺序传输脉冲超声波并接收相应的回波信号序列，以一个或多个在发送的超声波脉冲之后更预定的时间延迟，以及通过频谱分析处理所述回波信号样本序列，以获得包括预期血液速度值的范围内的多个速度分量的血液速度谱，并重复所述处理多次以获得用于基本上实时显示的速度 - 时间谱。对于所述血液速度谱中的每个速度分量，接收到的回波信号在脉冲传输之后的所述预定延迟中随后随着增加或减小而被采样，根据以与每个相对应的速度运动的血液反射的超声脉冲的往返时间的变化说速度分量。对所得到的信号样本序列进行处理以获得所述速度分量。

4. 发明授权

US5560363A Method for calculation of blood velocity and blood velocity spread from multi gated doppler signals 失效
标题翻译：用于计算多门控多普勒信号的血液速度和血液速度扩散的方法
公开(公告)号：US5560363A
公开(公告)日：1996-10-01
申请号：US379208
申请日：1995-01-27
申请人： Hans Torp , Kjell Kristoffersen
发明人： Hans Torp , Kjell Kristoffersen
IPC分类号： G01P5/00 , A61B8/06 , G01P5/22 , G01P5/24 , G01S15/50 , G01S15/58 , G01S15/89 , G06F17/00
CPC分类号： A61B8/06 , G01P5/22 , G01P5/244 , G01S15/582 , G01S15/8979
摘要： A method for velocity estimation based on a complex demodulated doppler signal in a multi-gated doppler. The method is based on the autocorrelation function estimates of the complex demodulated doppler signal. Contribution to the correlation function from the receiver noise is found by measuring the noise in absence of echo signals. The obtained values are subtracted from the correlation estimates before further processing. A limited number of candidates for the true velocity are calculated from the autocorrelation function phase.
摘要翻译：一种基于多门控多普勒中复合解调多普勒信号的速度估计方法。该方法基于复数解调多普勒信号的自相关函数估计。通过在不存在回波信号的情况下测量噪声来发现对接收机噪声的相关函数的贡献。在进一步处理之前从相关估计中减去获得的值。从自相关函数阶段计算真实速度的有限数量的候选。

5. 发明授权

US07077807B2 Method and apparatus for providing real-time calculation and display of tissue deformation in ultrasound imaging 有权
标题翻译：用于提供实时计算和显示超声成像组织变形的方法和装置
公开(公告)号：US07077807B2
公开(公告)日：2006-07-18
申请号：US10705190
申请日：2003-11-10
申请人： Hans Torp , Bjorn Olstad , Andreas Heimdal , Steinar Bjaerum
发明人： Hans Torp , Bjorn Olstad , Andreas Heimdal , Steinar Bjaerum
IPC分类号： A61B8/00
CPC分类号： A61B8/485 , A61B5/0456 , A61B5/7239 , A61B8/488 , A61B8/543 , G01S7/52036 , G01S7/52038 , G01S7/52042 , G01S7/52057 , G01S7/52085 , G01S7/52095 , G01S15/584 , G01S15/8979
摘要： An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. A method to estimate a strain rate in any direction, not necessarily along the ultrasound beam, based on tissue velocity data from a small region of interest around a sample volume is disclosed. Quantitative tissue deformation parameters, such as tissue velocity, tissue velocity integrals, strain rate and/or strain, may be presented as functions of time and/or spatial position for applications such as stress echo. For example, strain rate or strain values for three different stress levels may be plotted together with respect to time over a cardiac cycle.
摘要翻译：公开了用于计算和显示组织变形参数的超声系统和方法。公开了一种基于来自围绕样本体积的小的感兴趣区域的组织速度数据来估计任何方向（不一定沿着超声波束）的应变速率的方法。可以将诸如组织速度，组织速度积分，应变速率和/或应变的定量组织变形参数呈现为诸如应力回波的应用的时间和/或空间位置的函数。例如，三个不同应力水平的应变速率或应变值可以相对于心脏周期上的时间被绘制在一起。

6. 发明申请

US20060058673A1 Method and apparatus for detecting cardiac events 有权
标题翻译：检测心脏事件的方法和装置
公开(公告)号：US20060058673A1
公开(公告)日：2006-03-16
申请号：US11064645
申请日：2005-02-24
申请人： Svein Aase , Sigmund Frigstad , Hans Torp
发明人： Svein Aase , Sigmund Frigstad , Hans Torp
IPC分类号： A61B8/02
CPC分类号： A61B8/08 , A61B8/0883 , A61B8/488
摘要： A method and apparatus for detecting cardiac events. Ultrasonic data comprising a heart cycle is acquired by a probe. Tissue velocities associated with the ultrasonic data are detected. One of a maximum and a minimum value is detected based on the tissue velocities. A time within the heart cycle associated with the maximum or minimum value is determined, and a cardiac event is detected with respect to the time within the heart cycle and the maximum or minimum value.
摘要翻译：一种用于检测心脏事件的方法和装置。包括心脏周期的超声数据由探针获得。检测与超声波数据相关的组织速度。基于组织速度检测最大值和最小值之一。确定与最大或最小值相关联的心脏周期内的时间，并且相对于心脏周期内的时间和最大值或最小值检测心脏事件。

7. 发明申请

US20050203390A1 Method and apparatus for providing real-time calculation and display of tissue deformation in ultrasound imaging 有权
公开(公告)号：US20050203390A1
公开(公告)日：2005-09-15
申请号：US10705087
申请日：2003-11-10
申请人： Hans Torp , Bjorn Olstad , Andreas Heimdal , Steinar Bjaerum
发明人： Hans Torp , Bjorn Olstad , Andreas Heimdal , Steinar Bjaerum
IPC分类号： A61B8/13 , A61B5/0456 , A61B8/08 , G01S7/52 , G01S15/58 , G01S15/89 , A61B8/00
CPC分类号： A61B8/485 , A61B5/0456 , A61B5/7239 , A61B8/488 , A61B8/543 , G01S7/52036 , G01S7/52038 , G01S7/52042 , G01S7/52057 , G01S7/52085 , G01S7/52095 , G01S15/584 , G01S15/8979
摘要： An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. An ultrasound acquisition technique that allows a high frame rate in tissue velocity imaging or strain rate imaging is employed. With this acquisition technique the same ultrasound pulses are used for the tissue image and the Doppler based image. A sliding window technique is used for processing. The tissue deformation parameter strain is also determined by an accumulation of strain rate estimates for consecutive frames over an interval. The interval may be a triggered interval generated by, for example, an R-wave in an ECG trace. The strain calculation may be improved by moving the sample volume from which the strain rate is accumulated from frame-to-frame according to the relative displacement of the tissue within the original sample volume. The relative displacement of the tissue is determined by the instantaneous tissue velocity of the sample volume. An estimation of strain rate based upon a spatial derivative of tissue velocity is improved by adaptively varying the spatial offset, dr. The spatial offset, dr, can be maximized to cover the entire tissue segment (e.g., heart wall width) while still keeping both of the sample volumes at each end of the offset within the tissue segment. This may be accomplished by determining whether various parameters (e.g., grayscale value, absolute power estimate, magnitude of the autocorrelation function with unity temporal lag and/or magnitude of strain correlation) of the sample volumes within in the spatial offset are above a given threshold. Strain rate may be estimated using a generalized strain rate estimator that is based on a weighted sum of two-sample strain rate estimators with different spatial offsets. The weights are proportional to the magnitude of the strain rate correlation estimate for each spatial offset, and thus reduce the effect of noisy, i.e. poorly correlated, samples. An improved signal correlation estimator that uses a spatial lag in addition to the usual temporal lag is disclosed. The spatial lag is found from the tissue velocity. The improved signal correlation estimator can be utilized both in the estimation of strain rate and tissue velocity. Tissue velocity may be estimated in a manner that reduces aliasing while maintaining spatial resolution. Three copies of a received ultrasound signal are bandpass filtered at three center frequencies. The middle of the three center frequencies is centered at the second harmonic of the ultrasound signal. A reference tissue velocity is estimated from the two signals filtered at the outside center frequencies. The reference tissue velocity is used to choose a tissue velocity from a number of tissue velocities estimated from the signal centered at the second harmonic. A method to estimate the strain rate in any direction, not necessarily along the ultrasound beam, based on tissue velocity data from a small region of interest around a sample volume is disclosed. Quantitative tissue deformation parameters, such as tissue velocity, tissue velocity integrals, strain rate and/or strain, may be presented as functions of time and/or spatial position for applications such as stress echo. For example, strain rate or strain values for three different stress levels may be plotted together with respect to time over a cardiac cycle. Parameters which are derived from strain rate or strain velocity, such as peak systolic wall thickening percentage, may be plotted with respect to various stress levels,

8. 发明授权

US06350238B1 Real-time display of ultrasound in slow motion 有权
标题翻译：实时显示超声波在慢动作
公开(公告)号：US06350238B1
公开(公告)日：2002-02-26
申请号：US09432060
申请日：1999-11-02
申请人： Bjorn Olstad , Hans Torp
发明人： Bjorn Olstad , Hans Torp
IPC分类号： A61B800
CPC分类号： A61B8/543 , A61B5/0456 , A61B8/00 , A61B8/06 , A61B8/13 , A61B8/463 , G01S7/52034 , G01S7/52074 , G01S7/52085 , G01S15/899 , G03B42/06
摘要： A system and method for acquiring ultrasound information at an acquisition rate and displaying at least a portion of the acquired ultrasound information at a display rate that is slower than the acquisition rate is disclosed. Ultrasound information may be continuously acquired and stored at a frame-rate that is greater than the perception rate of the human eye. At least a portion of the acquired ultrasound information is displayed at a frame-rate that allows human perception. Acquisition and display are synchronized from time-to-time upon satisfaction of a synchronization condition. The synchronization condition may be related to a predetermined time interval or a triggering event generated by or through triggering generated by, for example, a physiological event detected in, for example, an ECG trace. Acquired ultrasound information is, thus, displayed in a real-time slow motion manner that maintains real-time synchrony and yet provides a display rate that is lower than the acquisition rate and preferably lower than the maximum perception rate of the human eye.
摘要翻译：公开了一种用于以获取速率获取超声信息并且以比获取速率慢的显示速率显示所获取的超声信息的至少一部分的系统和方法。超声信息可以以比人眼的感知速率大的帧速率连续地获取和存储。获取的超声信息的至少一部分以允许人感知的帧速率显示。获取和显示在满足同步条件时不时地同步。同步条件可以与由例如由ECG轨迹中检测到的生理事件产生的或由触发产生的预定时间间隔或触发事件有关。因此，获取的超声信息以实时慢动作方式显示，其保持实时同步，并且提供低于获取速率的显示速率，并且优选地低于人眼的最大感知速率。

9. 发明授权

US08265363B2 Method and apparatus for automatically identifying image views in a 3D dataset 有权
标题翻译：用于自动识别3D数据集中的图像视图的方法和装置
公开(公告)号：US08265363B2
公开(公告)日：2012-09-11
申请号：US12365738
申请日：2009-02-04
申请人： Fredrik Orderud , Stein Rabben , Hans Torp , Vidar Lundberg
发明人： Fredrik Orderud , Stein Rabben , Hans Torp , Vidar Lundberg
IPC分类号： G06K9/00 , G06K9/36 , G06K9/46
CPC分类号： A61B8/08 , A61B8/483 , G06T7/251 , G06T7/277 , G06T2207/10136 , G06T2207/30048
摘要： A method is provided for automatically identifying image views in a three-dimensional dataset comprises accessing with a processor a three-dimensional dataset comprising a plurality of image frames and fitting with the processor at least one deformable model to at least one structure within each of the image frames. The method further comprises identifying with the processor at least one feature point within each of the image frames based on the at least one deformable model and displaying on a display at least one image view based on the at least one feature point.
摘要翻译：提供了一种用于在三维数据集中自动识别图像视图的方法，包括使用处理器访问包括多个图像帧的三维数据集，并且与所述处理器拟合至少一个可变形模型，以将所述三维数据集中的至少一个结构图像帧。该方法还包括基于至少一个可变形模型，利用处理器识别每个图像帧内的至少一个特征点，并且基于至少一个特征点在显示器上显示至少一个图像视图。

10. 发明授权

US07261694B2 Method and apparatus for providing real-time calculation and display of tissue deformation in ultrasound imaging 有权
标题翻译：用于提供实时计算和显示超声成像组织变形的方法和装置
公开(公告)号：US07261694B2
公开(公告)日：2007-08-28
申请号：US10705419
申请日：2003-11-10
申请人： Hans Torp , Bjorn Olstad , Andreas Heimdal , Steinar Bjaerum
发明人： Hans Torp , Bjorn Olstad , Andreas Heimdal , Steinar Bjaerum
IPC分类号： A61B8/00
CPC分类号： A61B8/485 , A61B5/0456 , A61B5/7239 , A61B8/488 , A61B8/543 , G01S7/52036 , G01S7/52038 , G01S7/52042 , G01S7/52057 , G01S7/52085 , G01S7/52095 , G01S15/584 , G01S15/8979
摘要： An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. The tissue deformation parameter strain is determined by an accumulation of strain rate estimates for consecutive frames over an interval. The interval may be a triggered interval generated by, for example, an R-wave in an ECG trace. Three quantitative tissue deformation parameters, such as tissue velocity, tissue velocity integrals, strain rate and/or strain, may be presented as functions of time and/or spatial position for applications such as stress echo. For example, strain rate or strain values for three different stress levels may be plotted together with respect to time over a cardiac cycle. Parameters which are derived from strain rate or strain velocity, such as peak systolic wall thickening percentage, may be plotted with respect to various stress levels.
摘要翻译：公开了用于计算和显示组织变形参数的超声系统和方法。组织变形参数应变由连续帧在一个间隔上的应变速率估计的积累来确定。该间隔可以是由例如ECG迹线中的R波产生的触发间隔。可以将诸如组织速度，组织速度积分，应变速率和/或应变的三个定量组织变形参数呈现为诸如应力回波的应用的时间和/或空间位置的函数。例如，三个不同应力水平的应变速率或应变值可以相对于心脏周期上的时间被绘制在一起。可以根据各种应力水平绘制从应变速率或应变速度得到的参数，如收缩期峰值增厚百分比。

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