High frequency imaging transducers from hollow spheres

R. Meyer, S. Alkoy, W. Chen, T. Ritter, J. Cochran, R. Newnham

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations


Single element transducers were designed and built using shell sections of piezoelectric hollow spheres. The shell sections provide inherent focal depths and allow for the easy production of low f-number transducers. Because of the low f-numbers, these transducers have improved lateral resolution compared to other transducers operating at the same frequency. Spheres were mass-produced using the sacrificial core technique and had diameters of 1-3 mm and wall thickness from 20 to 120 μm. The lead titanate transducers described here had thickness mode resonance frequencies ranging from 25 MHz to 70 MHz. Electromechanical properties and pulse-echo response of these transducers were evaluated. Skin images taken with an Ultrasonic Backscatter Microscope at 55 MHz are also presented.

Original languageEnglish (US)
Number of pages4
StatePublished - 2000
Event12th IEEE International Symposium on Applications of Ferroelectrics - Honolulu, HI, United States
Duration: Jul 21 2000Aug 2 2000


Other12th IEEE International Symposium on Applications of Ferroelectrics
Country/TerritoryUnited States
CityHonolulu, HI

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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