Non-invasive osteotomy using focused ultrasound

Satoshi Ishida, Nobuhiko Hata, Takashi Azuma, Shinichiro Umemura, Takeyoshi Dohi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Surgical reconstruction of bony defects such as Rotational Acetabular Osteotomy (RAO) in the orthopedics region involves operation of bony cutting using surgical saws or drills. Operators have to incise skin and open muscular system under anesthesia to make the bone visible, and require patients great pain and marks after the operation. So the system of bony cutting using focused ultrasound without incising skin has been developed. The ultrasound energy and the high pressure caused by cavitation generated by the minus vapor pressure ablates the focus area of the bone. The experiment of ablating the surface of a pig's bone by ultrasound was carried out in various irradiational conditions. At high oscillating frequency, in the case of continuum wave, mark of ablation without thermal damage was found at the focal point and the size was same as convergence beam area of ultrasonic wave. Besides, the ultrasonic propagation in the living body which consists of multiple organizations was analyzed using the time-domain finite element method. In comparison with the experimental result, some important parameters affecting to the cause of thermal damage at the focus on the bone was specified.

Original languageEnglish
Pages (from-to)2544-2545
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Publication statusPublished - 2002
Externally publishedYes
EventProceedings of the 2002 IEEE Engineering in Medicine and Biology 24th Annual Conference and the 2002 Fall Meeting of the Biomedical Engineering Society (BMES / EMBS) - Houston, TX, United States
Duration: 2002 Oct 232002 Oct 26


  • Osteotomy
  • Simulation
  • Ultrasound

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics


Dive into the research topics of 'Non-invasive osteotomy using focused ultrasound'. Together they form a unique fingerprint.

Cite this