发明公开
EP0573249A1 Continuous display of peak and mean blood flow velocities
失效
StändigeAnzeige der spitzen- und der mittlerenBlutströmungsgeschwindigkeit。
- 专利标题： Continuous display of peak and mean blood flow velocities
- 专利标题（中）： StändigeAnzeige der spitzen- und der mittlerenBlutströmungsgeschwindigkeit。
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申请号： EP93304234.3申请日： 1993-06-01
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公开(公告)号： EP0573249A1公开(公告)日： 1993-12-08
- 发明人: Routh, Helen Frances , Peterson, Roy Beck , Powrie, Charles Wesley, Jr.
- 申请人： ADVANCED TECHNOLOGY LABORATORIES, INC.
- 申请人地址： 22100 Bothell Everett Highway Bothell, Washington 98041 US
- 专利权人： ADVANCED TECHNOLOGY LABORATORIES, INC.
- 当前专利权人： ADVANCED TECHNOLOGY LABORATORIES, INC.
- 当前专利权人地址： 22100 Bothell Everett Highway Bothell, Washington 98041 US
- 代理机构： Mercer, Christopher Paul
- 优先权： US892301 19920602
- 主分类号： G01S7/52
- IPC分类号： G01S7/52 ; G01S15/50
摘要：
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.
公开/授权文献
- EP0573249B1 Continuous display of peak and mean blood flow velocities 公开/授权日：1998-04-01
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