Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-03-26
1999-08-17
Jaworski, Francis J.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
A61B 806
Patent
active
059386118
ABSTRACT:
A color flow imaging technique uses coded excitation on transmit and pulse compression on receive. Coded excitation allows a long transmit pulse to be compressed on receive such that most energy is concentrated in a short interval. Multiple transmit firings of the same coded pulse sequence are focused at the same transmit focal position with the same transmit characteristics. The receive signals are compressed utilizing matched or mismatched filtering. These techniques can be used to maximize color flow sensitivity in deep-lying regions. Alternatively, for a given transmit acoustic burst length and dosage, the spatial resolution can be improved without compromising sensitivity.
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Takeuchi, "Coded Excitation for Harmonics Imaging", Proc. 1996 IEEE Ultrasonics Symp., pp. 1433-1436.
Welch, "Pulse Compression Ultrasound for Minimization of Transmitted Peak Power", Proc. 20th Annual Northeast Bioengineering Conference, Springfield, MA.
Welch et al., "Sidelobe Suppressed Spread Spectrum Pulse Compression for Ultrasonic Tissue Imaging," IEEE Trans. Ultrasonics, Ferroelec. & Freq. Control (accepted for publication 1997).
O'Donnell, "Coded Excitation System for Improving the Penetration of Real-Time Phased-Array Imaging Systems," IEEE Trans. Ultrason. Ferroelec. Freq. Cont., vol. 39, No. 3, May 1992, pp. 341-351.
Chiao Richard Y.
Hall Anne Lindsay
Muzilla David John
Cabou Christian G.
Flaherty Dennis M.
General Electric Company
Jaworski Francis J.
Price Phyllis Y.
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