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公开(公告)号：JPH11342130A
公开(公告)日：1999-12-14
申请号：JP13411899
申请日：1999-05-14
Applicant: ADVANCED TECH LAB
Inventor： CRITON ALINE LAURE , ROBINSON MARSHALL TAYLOR , LOUPAS THANASIS , PETERSON ROY BECK , PESQUE PATRICK R , ROUTH HELEN F
Abstract: PROBLEM TO BE SOLVED: To measure and display of a specified intracorporeal region, the movement of an intracorporeal texture, or the bloodstream by providing a Doppler processor for processing a received signal including harmonics of a basic frequency. SOLUTION: A harmonic echo signal is transmitted to a Doppler processor 50 through a bus 90 or a wall filter 52. When a user desires only the processing and display of blood flow information, the wall filter 52 removes a low frequency tissue signal component from the wide band harmonic echo signal. When the user desires the image processing of a moving tissue or both the moving tissue and the bloodstream, the wall filter 52 is bypassed, and a Doppler calculation is performed by a Doppler estimating apparatus 54 by use of the harmonic signal not filtered on the bus 90. Doppler shift characteristic such as frequency (speed), Doppler power (intensity), acceleration or dispersion can be provided by the Doppler processing of the harmonic echo signal.
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公开(公告)号：DE69317697T2
公开(公告)日：1998-07-23
申请号：DE69317697
申请日：1993-06-01
Applicant: ADVANCED TECH LAB
Inventor： ROUTH HELEN FRANCES , PETERSON ROY BECK , POWRIE CHARLES WESLEY
Abstract: A technique for continuously determining and displaying the peak and mean velocities of spectral Doppler information is disclosed. Received spectral Doppler data is examined over a predetermined period to determine the signal to noise ratio of the Doppler signals. Individual instantaneous measurements, or lines, of Doppler spectral information are analyzed in the power versus frequency domain to compare the line information against a noise threshold determined by the signal to noise ratio. The maximum frequency signal component is thereby identified as the peak velocity of the spectral line. Mean velocity is calculated as an intensity weighted mean about the maximum power frequency of the line data. The identified peak and mean velocities are displayed in contrasting colors or shades on a continuously updated and displayed flow velocity versus time spectral display.
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公开(公告)号：DE69317697D1
公开(公告)日：1998-05-07
申请号：DE69317697
申请日：1993-06-01
Applicant: ADVANCED TECH LAB
Inventor： ROUTH HELEN FRANCES , PETERSON ROY BECK , POWRIE CHARLES WESLEY
Abstract: A technique for continuously determining and displaying the peak and mean velocities of spectral Doppler information is disclosed. Received spectral Doppler data is examined over a predetermined period to determine the signal to noise ratio of the Doppler signals. Individual instantaneous measurements, or lines, of Doppler spectral information are analyzed in the power versus frequency domain to compare the line information against a noise threshold determined by the signal to noise ratio. The maximum frequency signal component is thereby identified as the peak velocity of the spectral line. Mean velocity is calculated as an intensity weighted mean about the maximum power frequency of the line data. The identified peak and mean velocities are displayed in contrasting colors or shades on a continuously updated and displayed flow velocity versus time spectral display.
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公开(公告)号：NO992323A
公开(公告)日：1999-11-15
申请号：NO992323
申请日：1999-05-12
Applicant: ADVANCED TECH LAB
Inventor： CRITON ALINE LAURE , ROBINSON MARSHALL TAYLOR , LOUPAS THANASIS , PETERSON ROY BECK , PESQUE PATRICK RENE , ROUTH HELEN F
CPC classification number: G01S15/8979 , A61B8/488 , G01S7/52038 , G01S7/52069 , G01S7/52071 , G01S15/8993
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公开(公告)号：AT164685T
公开(公告)日：1998-04-15
申请号：AT93304234
申请日：1993-06-01
Applicant: ADVANCED TECH LAB
Inventor： ROUTH HELEN FRANCES , PETERSON ROY BECK , POWRIE CHARLES WESLEY JR
Abstract: A technique for continuously determining and displaying the peak and mean velocities of spectral Doppler information is disclosed. Received spectral Doppler data is examined over a predetermined period to determine the signal to noise ratio of the Doppler signals. Individual instantaneous measurements, or lines, of Doppler spectral information are analyzed in the power versus frequency domain to compare the line information against a noise threshold determined by the signal to noise ratio. The maximum frequency signal component is thereby identified as the peak velocity of the spectral line. Mean velocity is calculated as an intensity weighted mean about the maximum power frequency of the line data. The identified peak and mean velocities are displayed in contrasting colors or shades on a continuously updated and displayed flow velocity versus time spectral display.
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Patent Agency Ranking
公开(公告)号：DE69118645T2
公开(公告)日：1996-11-28
申请号：DE69118645
申请日：1991-10-11
Applicant: ADVANCED TECH LAB
Inventor： PETERSON ROY BECK , POWERS JEFFRY E
Abstract: An ultrasonic diagnostic system for measuring fluid flow velocities through Doppler techniques is provided which eliminates the effects of tissue motion from fluid flow velocity information. Doppler information signals are discriminated to determine the presence of signal components resulting from moving tissue, which signal components are located at frequencies of a Doppler spectrum other than the predetermined frequency location of stationary tissue signals. The tissue motion signal components present are shifted to the predetermined frequency location and removed by high pass filtering the Doppler signals. The remaining signals are then shifted back to their original frequency location and transmitted to a Doppler velocity estimator for further processing of the fluid flow velocity information and ultimate display of the information. To overcome problems of Doppler frequency inaccuracies at discrete spatial positions, the Doppler signals from a plurality of neighbouring spatial locations are examined in the aggregate to determine the frequency location of tissue motion signal components.
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公开(公告)号：NO992323L
公开(公告)日：1999-11-15
申请号：NO992323
申请日：1999-05-12
Applicant: ADVANCED TECH LAB
Inventor： CRITON ALINE LAURE , ROBINSON MARSHALL TAYLOR , LOUPAS THANASIS , PETERSON ROY BECK , PESQUE PATRICK RENE , ROUTH HELEN F
Abstract: An ultrasonic diagnostic imaging system and method are described by which a fundamental frequency signal is transmitted into the body and harmonic (nonlinear) echo returns are received from the transmission. The harmonic echo signals are Doppler processed and displayed. The harmonic Doppler signals may be displayed alone, or in combination with a fundamental frequency or harmonic grayscale image. In a preferred embodiment harmonic signals returned from moving tissue are segmented on an intensity or frequency basis and displayed. The inventive apparatus and method provide highly resolved ultrasonic images of moving tissue which are substantially unobscured by image clutter from structures or tissue in the near field.
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公开(公告)号：NO992323D0
公开(公告)日：1999-05-12
申请号：NO992323
申请日：1999-05-12
Applicant: ADVANCED TECH LAB
Inventor： CRITON ALINE LAURE , ROBINSON MARSHALL TAYLOR , LOUPAS THANASIS , PETERSON ROY BECK , PESQUE PATRICK RENU , ROUTH HELEN F
Abstract: An ultrasonic diagnostic imaging system and method are described by which a fundamental frequency signal is transmitted into the body and harmonic (nonlinear) echo returns are received from the transmission. The harmonic echo signals are Doppler processed and displayed. The harmonic Doppler signals may be displayed alone, or in combination with a fundamental frequency or harmonic grayscale image. In a preferred embodiment harmonic signals returned from moving tissue are segmented on an intensity or frequency basis and displayed. The inventive apparatus and method provide highly resolved ultrasonic images of moving tissue which are substantially unobscured by image clutter from structures or tissue in the near field.
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公开(公告)号：DE69118645D1
公开(公告)日：1996-05-15
申请号：DE69118645
申请日：1991-10-11
Applicant: ADVANCED TECH LAB
Inventor： PETERSON ROY BECK , POWERS JEFFRY E
Abstract: An ultrasonic diagnostic system for measuring fluid flow velocities through Doppler techniques is provided which eliminates the effects of tissue motion from fluid flow velocity information. Doppler information signals are discriminated to determine the presence of signal components resulting from moving tissue, which signal components are located at frequencies of a Doppler spectrum other than the predetermined frequency location of stationary tissue signals. The tissue motion signal components present are shifted to the predetermined frequency location and removed by high pass filtering the Doppler signals. The remaining signals are then shifted back to their original frequency location and transmitted to a Doppler velocity estimator for further processing of the fluid flow velocity information and ultimate display of the information. To overcome problems of Doppler frequency inaccuracies at discrete spatial positions, the Doppler signals from a plurality of neighbouring spatial locations are examined in the aggregate to determine the frequency location of tissue motion signal components.
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公开(公告)号：AT136447T
公开(公告)日：1996-04-15
申请号：AT91309373
申请日：1991-10-11
Applicant: ADVANCED TECH LAB
Inventor： PETERSON ROY BECK , POWERS JEFFRY E
Abstract: An ultrasonic diagnostic system for measuring fluid flow velocities through Doppler techniques is provided which eliminates the effects of tissue motion from fluid flow velocity information. Doppler information signals are discriminated to determine the presence of signal components resulting from moving tissue, which signal components are located at frequencies of a Doppler spectrum other than the predetermined frequency location of stationary tissue signals. The tissue motion signal components present are shifted to the predetermined frequency location and removed by high pass filtering the Doppler signals. The remaining signals are then shifted back to their original frequency location and transmitted to a Doppler velocity estimator for further processing of the fluid flow velocity information and ultimate display of the information. To overcome problems of Doppler frequency inaccuracies at discrete spatial positions, the Doppler signals from a plurality of neighbouring spatial locations are examined in the aggregate to determine the frequency location of tissue motion signal components.
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