Surgery – Truss – Pad
Patent
1994-10-06
1995-10-24
Jaworski, Francis
Surgery
Truss
Pad
12866203, 128916, A61B 800
Patent
active
054601819
ABSTRACT:
A method and apparatus for three dimensional ultrasonic scanning with reduced electronic switching and cabling requirements. The invention includes a body including a relaxor ferroelectric ceramic material and electrodes coupled to opposing surfaces of the body. Electronic switches select electrodes so as to select column regions of the body that are arranged adjacent to one another in a row extending radially outward from a central axis of the body. A bias voltage source is coupled with the electronic switches for substantially polarizing ceramic material within the selected column regions of the body. A sector controller dynamically configures the electronic switches to rotationally vary a position of the row arrangement of selected column regions. An oscillating voltage source excites the row of selected column regions to emit an acoustic beam, so that the beam rotationally scans the medium as the sector controller rotationally varies the position of the row arrangement.
REFERENCES:
patent: 2589403 (1952-03-01), Kurie
patent: 3093760 (1963-06-01), Tarasevich
patent: 3378704 (1968-04-01), Miller et al.
patent: 3401377 (1968-09-01), Bartlett et al.
patent: 3462746 (1969-08-01), Bartlett
patent: 3590287 (1971-06-01), Berlincourt
patent: 3718898 (1973-02-01), Cook et al.
patent: 3833825 (1974-09-01), Haan
patent: 4062237 (1977-12-01), Fox
patent: 4087716 (1978-05-01), Heywang
patent: 4096756 (1978-06-01), Alphonse
patent: 4211948 (1980-07-01), Smith et al.
patent: 4356422 (1982-10-01), van Maanen
patent: 4366406 (1982-12-01), Smith et al.
patent: 4367426 (1983-01-01), Kumada et al.
patent: 4672591 (1987-06-01), Breimesser et al.
patent: 4695988 (1987-09-01), Banno
patent: 4717851 (1988-01-01), Fenner et al.
patent: 4736631 (1988-04-01), Takeuchi et al.
patent: 4835747 (1989-05-01), Billet
patent: 4939826 (1990-07-01), Shoup
patent: 4960107 (1990-10-01), Aida et al.
patent: 4961424 (1990-10-01), Kubota et al.
patent: 5025790 (1991-06-01), Dias
patent: 5045746 (1991-09-01), Wersing et al.
patent: 5060651 (1991-10-01), Kondo et al.
patent: 5097709 (1992-03-01), Masuzawa et al.
patent: 5099459 (1992-03-01), Smith
patent: 5115809 (1992-05-01), Saitoh et al.
patent: 5142187 (1992-08-01), Saito et al.
patent: 5174296 (1992-12-01), Watanabe et al.
patent: 5175709 (1992-12-01), Slayton et al.
patent: 5237542 (1992-08-01), Burke et al.
patent: 5273045 (1993-12-01), Chihara et al.
N. Kim, S. J. Jang, T. R. Shrout; "Relaxor Based Fine Grain Piezoelectric Materials; Proceedings of the 1990 IEEE International Symposium on Applications of Ferroelectrics"; pp. 605-609, 1991.
W. Y. Pan, W. Y. Gu, D. J. Taylor and L. E. Cross; "Large Piezoelectric Effect Induced by Direct Current Bias in PMN:PT Relaxor Ferroelectric Ceramics"; Japanese Journal of Applied Physics, vol. 28, No. 4, 1989, pp. 653-661.
Thomas R. Shrout and Joseph Fielding, Jr.; "Relaxor Ferroelectric Materials"; 1990 Ultrasonic Symposium Proceedings, vol. 2, IEEE, 1990, pp. 711-720.
Sixte de Fraguier, Jean-Francois Gelly, Leon Volnerman and Olivier Lanuzel; "A Novel Acoustic Design for Dual Frequency Transducers Resulting in Separate Bandpass for Color Flow Mapping (CFM)".
Hiroshi Takeuchi, Hiroshi Masuzawa, and Yukio Ito; "Medical Ultrasonic Probe Using Electrostrictive/Polymer Composite"; 1989 Ultrasonic Symposium Proceedings; IEEE, pp. 705-708.
D. J. Taylor, D. Damjanovic, A. S. Bhalla, and L. E. Cross; "Complex Piezoelectric, Elastic, and Dielectric Coefficient of La-Doped 0.93 Pb(Mg.sub.1/3 NB.sub.2/3)O.sub.3 :0.07 PbTiO.sub.3 under DC Bias"; Ferroelectrics Letters, 1990, vol. 11, pp. 1-9.
D. J. Taylor, D. Damjanovic, A. S. Bhalla, and L. E. Cross; "Electric Field Dependence of d.sub.h In Lead Magnesium Niobate.Lead Titanate Ceramics"; Proceedings of the 1990 IEEE International Symposium on Application of Ferroelectric; pp. 341-345, 1991.
Wallace Arden Smith and Bertram A. Auld; "Modeling 1-3 Composite Piezoelectrics: Thickness-Mode Oscillations", IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 38, No. 1, Jan., 1991, pp. 40-47.
R. E. Newnham, D. P. Skinner and L. E. Cross; "Connectivity and Piezoelectric-Pyroelectric Composites"; Mat. Res. Bull. vol. 13, pp. 525-536.
Peder C. Pedersen, Oleh Tretiak, and Ping He; "Impedance-Matching Properties of an Inhomogeneous Matching Layer with Continuously Changing Acoustic Impedance"; 1991 Acoustical Society of America, vol. 72, No. 2, pp. 327-336.
Erhard K. Sittig; "Transmission Parameters of Thickness-Driven Piezoelectric Transducers Arranged in Multilayer Configurations"; IEEE Transactions on Sonics and Ultrasonics, vol. SU-14, No. 4, Oct., 1967, pp. 167-174.
Karen Pendergraft and Ronald Piper; "An Exact Solution for a Reflection Coefficient in a medium having an Exponential Impedance profile"; 1993 Acoustical Society of America, vol. 94, No. 1, Jul., 1993. pp. 580-582.
Hewlett Packard Co.
Jaworski Francis
Lenell Jack A.
LandOfFree
Ultrasonic transducer for three dimensional imaging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic transducer for three dimensional imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic transducer for three dimensional imaging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1880740