Focused ultrasound transducer for thermal treatment

Shin Ichiro Umemura

Research output: Contribution to journalReview articlepeer-review

7 Citations (Scopus)


Air-backed transducers have been employed for thermal ultrasonic treatment including both ablation and hyperthermia because the power efficiency rather than the bandwidth is a main concern, unlike a typical imaging transducer working in a pulse mode. The characteristic of an air-backed piezoelectric transducer with a matching layer is analysed, and the role and choice of the matching layer is discussed. An element size of a focused array transducer, appropriate for such thermal treatment, is then estimated, and the characteristic of a piezoceramic transducer element of such a size was numerically analysed using a finite element code. The characteristic of a piezocomposite transducer element is also numerically analysed and its suitability to such a therapeutic array transducer is discussed.

Original languageEnglish
Pages (from-to)216-221
Number of pages6
JournalInternational Journal of Hyperthermia
Issue number2
Publication statusPublished - 2015 Mar 1


  • Air-backed transducer
  • Focused array transducer
  • Matching layer
  • Ultrasound

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)
  • Cancer Research


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