Design and evaluation of A3×21 Element 1.75 Dimensional tapered ultrasound phased array for the treatment of prostate disease

Masashi Wada, Tohru Sekino, Takafumi Kusunose, Tadachika Nakayama, Yong Ho Choa, Koich Niihara, N. B. Smith, K. Y. Saleh

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This paper describes the design, construction, and evaluation of a 1.75 dimensional (1.75-D) tapered ultrasound phased array to be used in the treatment of benign prostatic hyperplasia and prostate cancer. The array was designed to be able to focus and steer in a three dimensional volume with a maximum steering angle of ±13.5° in the transverse direction and a maximum depth of penetration of 11 cm, which allows the treatment of large prostates. A piezoelectric ceramic (PZT-8) at a frequency of 1.2 MHz was used as the material of the transducer since it can handle the high power needed for tissue ablation and two matching layers were used for maximum acoustic power transmission to tissue. To verify the capability of the transducer for focusing and steering, exposimetry was performed and the results correlated well with the calculated field.

Original languageEnglish
Pages (from-to)121-124
Number of pages4
JournalMaterials Research Innovations
Volume8
Issue number2
DOIs
Publication statusPublished - 2004 Jun

Keywords

  • 1.75-D array
  • Focusing
  • Matching layer
  • Necrosis
  • Transducer

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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