Compensation of transducer element positions in a ring array ultrasonic computer tomography system

Satoshi Tamano, Takashi Azuma, Haruka Imoto, Shu Takagi, Shin Ichiro Umemura, Yoichiro Matsumoto

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An ultrasonic ring array system was newly developed and ultrasonic computer tomography (USCT) image reconstruction was performed. The USCT transducer of 104mm diameter had a center frequency of 1.75MHz and a %6 dB transmit and receive two-way fractional bandwidth of 66%. It had a full 360° circumference divided into four blocks, each of which had 256 elements. All 1024 elements were connected to a high-voltage multiplexer IC. The potential problem of image degradation, which might have been caused by insufficient alignment accuracy between the blocks, was solved by fitting and compensating the delay due to the misalignment. This resulted in a measured transmit and receive beam width of 0.20mm, which is close to the theoretical value.

Original languageEnglish
Article number07HF24
JournalJapanese journal of applied physics
Volume54
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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