Comparison of articular cartilage images assessed by high-frequency ultrasound microscope and scanning acoustic microscope

Yoshihiro Hagiwara, Yoshifumi Saijo, Akira Ando, Yoshito Onoda, Hideaki Suda, Eiichi Chimoto, Kouki Hatori, Eiji Itoi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Purpose: The purpose of this study was to compare images of a newly developed high-frequency ultrasound imaging system (HFUIS) and scanning acoustic microscope (SAM) and to calculate their Pearson product moment correlations with a view to applying HFUIS for clinical use. Methods: Cylindrical cartilage-bone complexes from adult male Sprague-Dawley rats were obtained. The specimens were immersed in normal saline and scanned by HFUIS. Intensity by HFUIS was normalised by reflection from a steel plate at the same distance. After the scanning, specimens were fixed with paraformaldehyde, decalcified and embedded in paraffin. Thinly sliced tissues were prepared for SAM evaluation. After the scanning, three layers of articular cartilage (superficial, middle and deep) were independently evaluated and their relationships calculated. Results: The superficial and deep layers indicated high relative intensity, whereas the middle layer showed nonhomogeneous relative intensity by HFUIS. A high relative intensity by HFUIS and high sound speed area by SAM had strong correlations (Pearson product moment correlation, superficial layer 0.704, middle layer 0.731). Conclusions: HFUIS produced high-resolution images of the articular cartilage and its intensity was strongly correlated with sound speed by SAM.

Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalInternational Orthopaedics
Volume36
Issue number1
DOIs
Publication statusPublished - 2012 Jan

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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