Implantable ultrasound devices

David Vilkomerson, Thomas Chilipka, John Bogan, John Blebea, Rashad Choudry, John Wang, Michael Salvatore, Vittorio Rotella, Krish Soundararajan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations


Using medical implants to wirelessly report physiological data is a technique that is rapidly growing. Ultrasound is well-suited for implants -- it requires little power and this form of radiated energy has no ill effects on the body. We report here on techniques we have developed in our experience gained in implanting over a dozen Doppler ultrasound flow-measuring implants in dogs. The goal of our implantable device is to measure flow in an arterial graft. To accomplish this, we place a Doppler transducer in the wall of a graft and an implant unit under the skin that energizes the 20 MHz Doppler transducer system, either when started by external command or by internal timetable. The implant records the digitized Doppler real and imaginary channels and transmits the data to a nearby portable computer for storage and evaluation. After outlining the overall operation of the system, we will concentrate on three areas of implant design where special techniques are required: ensuring safety, including biocompatibility to prevent the body from reacting to its invasion; powering the device, including minimizing energy used so that a small battery can provide long-life; and transmitting the data obtained.

Original languageEnglish
Title of host publicationMedical Imaging 2008
Subtitle of host publicationUltrasonic Imaging and Signal Processing
StatePublished - 2008
EventMedical Imaging 2008: Ultrasonic Imaging and Signal Processing - San Diego, CA, United States
Duration: Feb 17 2008Feb 18 2008

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferenceMedical Imaging 2008: Ultrasonic Imaging and Signal Processing
Country/TerritoryUnited States
CitySan Diego, CA


  • Biocompatibility
  • Blood flow measurement
  • Doppler
  • Graft monitoring
  • Implant
  • MICS
  • Telemetry


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