公开(公告)号：EP0430094B1

公开(公告)日：1996-01-24

申请号：EP90122392.5

申请日：1990-11-23

Applicant: ACOUSTIC IMAGING TECHNOLOGIES CORPORATION

Inventor： Sturgill, Michael R.

IPC: A61B8/06

CPC classification number: G01S15/8979 ,  A61B8/06

公开(公告)号：EP0430093A3

公开(公告)日：1992-03-04

申请号：EP90122391.7

申请日：1990-11-23

Applicant: ACOUSTIC IMAGING TECHNOLOGIES CORPORATION

Inventor： Jaeger, Paul M. ,  Sturgill, Michael R.

IPC: G01S15/89 ,  A61B8/08 ,  G01S15/52

CPC classification number: G01S15/8981 ,  A61B8/488

Abstract: An ultrasonic blood flow measuring and imaging system comprises a transmit-receive transducer for transmitting ultrasonic waves toward and into the human body and for receiving reflected echo signals which are then processed for use in a Doppler blood flow imaging and display system. Multiple ultrasonic pulse beams are transmitted into the body at each of a number of locations in an area under diagnosis. For each location a plurality of reflected echo signals are received during successive predetermined time intervals. Each received echo signal has a stationary component reflected from essentially stationary tissue and a Doppler component reflected from areas where movement is sensed, such as blood flow. The reflected echo signals are processed in a canceller having stationary signal acquisition and Doppler signal acquisition modes, in that order, for each flow measuring sequence. In the stationary acquisition mode, an ultrasound basis line is first transmitted, its echo detected, amplified, converted to digital, and then stored in a line buffer. The system then switches to the Doppler acquisition mode, and on each of the succeeding pulses the stored line samples are recalled from the line buffer, converted to analog form, and subtracted from the succeeding reflected echo signals. The difference is amplified, converted to digital, and processed by an MTI filter to thereby produce Doppler flow image data for use in imaging, including color imaging, of blood flow in the area under diagnosis.

公开(公告)号：EP0430094A1

公开(公告)日：1991-06-05

申请号：EP90122392.5

申请日：1990-11-23

Applicant: ACOUSTIC IMAGING TECHNOLOGIES CORPORATION

Inventor： Sturgill, Michael R.

IPC: A61B8/06 ,  G01S15/89

CPC classification number: G01S15/8979 ,  A61B8/06

Abstract: A system for improving the flow estimation sensitivity of an ultrasonic Doppler flow imaging system includes an ultrasonic wave transmitter and receiver for sequentially transmitting ultrasonic waves toward and into a living body and for receiving the reflected Doppler-shifted echo signals. A series of echo signals received from each of a number of points within the body are processed in a velocity estimator, using maximum entropy techniques, to produce an output signal representative of an estimated velocity of the flow at each of said points within the body. The processing means detects the series of echo signals for each point and calculates an average power spectrum based on the amplitude-versus-frequency distribution of the series of received echo signals. The power spectrum is calculated by fitting a first order polynomial to the series of echo signals, although higher order polynomials can be used. A peak center frequency shift associated with the data detected for each point is derived from the power spectrum. The resulting peak center frequency shift information is then processed to produce a velocity estimate for each of the points at which velocity is being measured, and the resulting velocity estimate information is then processed further for imaging in a two-dimensional Doppler color flow imaging display.

Abstract translation: 一种提高超声波多普勒血流成像系统的流估计灵敏度系统包括超声波发射器和接收器，用于顺序地发射超声波朝向并进入活体和用于接收反射多普勒频移的回波信号。 在身体内的一系列从各若干身体内点的接收的回波信号的在速度估计器进行处理，使用最大熵的技术，以产生代表在每一个所述的流的估计速度的输出信号点。 所述处理装置检测所述系列的每个点和在基于所述一系列接收回波信号的振幅 - 频率分布来计算平均功率谱回波信号。 功率谱是通过一阶多项式拟合到串联的回波信号的，尽管可以使用更高阶的多项式计算。 对于每个点检测到的数据相关联的峰中心频率偏移被从功率谱得到。 然后将所得的峰中心频率偏移信息进行处理以产生一个速度估计为每个在其中速度的点的被测量，然后将所得的速度估计的信息是在二维多普勒彩色血流成像显示处理进一步用于成像。

公开(公告)号：EP0430093A2

公开(公告)日：1991-06-05

申请号：EP90122391.7

申请日：1990-11-23

Applicant: ACOUSTIC IMAGING TECHNOLOGIES CORPORATION

Inventor： Jaeger, Paul M. ,  Sturgill, Michael R.

IPC: G01S15/89 ,  A61B8/08 ,  G01S15/52

CPC classification number: G01S15/8981 ,  A61B8/488

Abstract: An ultrasonic blood flow measuring and imaging system comprises a transmit-receive transducer for transmitting ultrasonic waves toward and into the human body and for receiving reflected echo signals which are then processed for use in a Doppler blood flow imaging and display system. Multiple ultrasonic pulse beams are transmitted into the body at each of a number of locations in an area under diagnosis. For each location a plurality of reflected echo signals are received during successive predetermined time intervals. Each received echo signal has a stationary component reflected from essentially stationary tissue and a Doppler component reflected from areas where movement is sensed, such as blood flow. The reflected echo signals are processed in a canceller having stationary signal acquisition and Doppler signal acquisition modes, in that order, for each flow measuring sequence. In the stationary acquisition mode, an ultrasound basis line is first transmitted, its echo detected, amplified, converted to digital, and then stored in a line buffer. The system then switches to the Doppler acquisition mode, and on each of the succeeding pulses the stored line samples are recalled from the line buffer, converted to analog form, and subtracted from the succeeding reflected echo signals. The difference is amplified, converted to digital, and processed by an MTI filter to thereby produce Doppler flow image data for use in imaging, including color imaging, of blood flow in the area under diagnosis.

Abstract translation: 超声波血流测量和成像系统包括用于向人体发射超声波并用于接收反射的回波信号的发射 - 接收换能器，然后被处理以用于多普勒血流成像和显示系统。 多个超声脉冲波束在被诊断的区域中的多个位置的每一个处传送到体内。 对于每个位置，在连续的预定时间间隔期间接收多个反射回波信号。 每个接收到的回波信号具有从基本上固定的组织反射的固定分量和从感测运动的区域（例如血流）反射的多普勒分量。 对于每个流量测量序列，反射回波信号在具有固定信号采集和多普勒信号捕获模式的消除器中按顺序进行处理。 在静态采集模式下，首先发送超声波基线，将其回波检测，放大，转换为数字，然后存储在行缓冲器中。 然后，系统切换到多普勒获取模式，并且在每个后续脉冲上，将存储的线样本从线缓冲器中调用，转换成模拟形式，并从后续的反射回波信号中减去。 该差异被放大，转换为数字，并由MTI滤波器处理，从而产生用于诊断区域中的血流的成像（包括彩色成像）的多普勒血流图像数据。