Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2005-08-30
2005-08-30
Jaworski, Francis J. (Department: 3737)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C029S025350
Reexamination Certificate
active
06936009
ABSTRACT:
A matching layer for ultrasound transducers has a gradient in impedance value from one surface to the other surface of the matching layer. The matching layer is composed of a plurality of sublayers made of composite materials and securely attached together and is disposed on the surface of the transducer element. The first sublayer adjacent to the transducer element has an impedance value less than or equal to that of the transducer element. The last sublayer adjacent to the target has an impedance value greater than or equal to that of the target. The impedance values of the sublayers decrease monotonically from the first to the last sublayer.
REFERENCES:
patent: 4016530 (1977-04-01), Goll
patent: 4101795 (1978-07-01), Fukumoto et al.
patent: 4297607 (1981-10-01), Lynnworth et al.
patent: 4635484 (1987-01-01), Lerch
patent: 4771205 (1988-09-01), Mequio
patent: 4881212 (1989-11-01), Takeuchi
patent: 5553035 (1996-09-01), Seyed-Bolorforosh et al.
patent: 5651365 (1997-07-01), Hanafy et al.
patent: 5744898 (1998-04-01), Smith et al.
patent: 5779644 (1998-07-01), Eberle et al.
patent: 5792058 (1998-08-01), Lee et al.
patent: 5938612 (1999-08-01), Kline-Schoder et al.
patent: 5974884 (1999-11-01), Sano et al.
G. Kossoff, “The Effects of Backing and Matching on the Performance of Piezoelectric Ceramic Transducers,” IEEE Trans. on Sonics and Ultrasonics, vol. SU1-13, No. 1, 20 (1966).
Levinson Lionel Monty
Smith Lowell Scott
Venkataramani Venkat Subramaniam
Cabou Christian G.
General Electric Company
Jaworski Francis J.
Testa Jean K.
LandOfFree
Matching layer having gradient in impedance for ultrasound... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Matching layer having gradient in impedance for ultrasound..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Matching layer having gradient in impedance for ultrasound... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3450769