Title :
Transducer for harmonic intravascular ultrasound imaging
Author :
Vos, H.J. ; Frijlink, M.A. ; Droog, E. ; Goertz, David E. ; Blacquiere, G. ; Gisolf, Andries ; de Jong, Nico ; van der Steern, A.F.W.
Author_Institution :
Biomed. Eng., Erasmus Med. Center, Rotterdam, Netherlands
Abstract :
A recent study has shown the feasibility of tissue harmonic imaging (THI) using an intravascular ultrasound (IVUS) transducer. This correspondence describes the design, fabrication, and characterization of a THI-optimized piezoelectric transducer with oval aperture of 0.75 mm by 1 mm. The transducer operated at 20 MHz and 40 MHz, and was comprised of a single piezoelectric layer with additional passive layers. The Krimholtz-Leedom-Matthaei (KLM) model was used to iteratively find optimal material properties of the different layers. The transducer characterization showed -6 dB fractional bandwidths of 30% and 25%, and two-way insertion losses of -20 dB and -36 dB, respectively.
Keywords :
biological tissues; biomedical ultrasonics; losses; piezoelectric transducers; ultrasonic transducers; -20 dB; -36 dB; -6 dB; 20 MHz; 40 MHz; Krimholtz-Leedom-Matthaei model; harmonic intravascular ultrasound imaging; piezoelectric transducer; tissue harmonic imaging; two-way insertion losses; Apertures; Biomedical imaging; Biomedical transducers; Cardiology; Catheters; Fabrication; Frequency; Piezoelectric transducers; Ultrasonic imaging; Ultrasonic transducers; Catheterization; Equipment Design; Equipment Failure Analysis; Image Enhancement; Membranes, Artificial; Microelectrodes; Miniaturization; Phantoms, Imaging; Reproducibility of Results; Sensitivity and Specificity; Transducers; Ultrasonography, Interventional;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2005.1563286
