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：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。