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1996 Fiscal Year Final Research Report Summary

Development of the measuring technique for ultrasonic attenuation distribution of tissues

Research Project

Project/Area Number 07650471
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 計測・制御工学
Research InstitutionCHIBA UNIVERSITY

Principal Investigator

HACHIYA Hiroyuki  Chiba University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90156349)

Project Period (FY) 1995 – 1996
Keywordsmedical ultrasonics / living tissue / sound speed / sound attenuation / measurement method
Research Abstract

The acoustic characteristics in biological tissues provide important diagnostic and treatment planning information. Conventional methods of sound speed determination generally require that transducers make physical contact with specimens in order to measure thickness and ultrasonic signal in the time domain. A method for determination of the sound speed and attenuation is proposed in which the sound travel time in the sample and the difference in total signal from the transducer to the rigid reflector due to the presence of the sample are estimated in the frequency domain and which does not require physical contact of ultrasonic probes to living or freshly excised tissue specimens. Using this method, the sound speeds and attenuation of human heart tissues are measured precisely. The speed and attenuation of sound in normal hearts varied minimally between individuals and was not related to body weight or age. Change of sound speed and attenuation of heart tissues was associated with histological change of a heart. Ultrasonic speed and attenuation measurements in tissues verified the method validity in medical application.

  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 蜂屋 弘之: "数10MHz帯パルス波による生体組織音響特測法の検討" 超音波医学. 23・Sup1. 269 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 蜂屋 弘之: "数10MHz帯パルス波を用いた心筋組織の音響特性評価" 超音波医学. 23・Sup2. 289 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Editor : F.Dunn: "Ultrasonic Tissue Characterization" Springer-Verleg Tokyo, 10 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Hachiya: "Quantitative Biological Measurement Using Ultrasound" Journal of Information Precessing Society of Japan. 36. 1103-1109 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Hachiya: "Ultrasonic Tissue Characterization" Editor-in-Chief : F.Dunn Springer. 63-72 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Hachiya: "Study for a measuring method of acoustic characters by 25MHz pulse wave" Japanese Journal of Medical Ultrasonics. 23, Suppl.1. 269 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Hachiya: "Evaluation of acoustic characters of myocardial tissues by using pulse wave of 25MHz" Japanese Journal of Medical Ultrasonics. 23, Suppl.2. 289 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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