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Optimal surface property for three-dimensional echo visualization

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Abstract

Purpose

Three-dimensional (3D) echo is a useful modality to guide off-pump intracardiac surgery, and this study aimed to determine the optimal surface property for minimizing echo dropout and grating lobes.

Methods

A total of 13 specimens were examined. The specimens were scanned while they were rotated from 0° to 90°, and en face views were recorded in the 3D zoom mode. Changes in brightness were compared with the surface profile, which was traced from microscopic images. The brightness and size of grating lobes were also examined.

Results

Decreases in brightness that were observed at a large rotation angle were classified into three groups (sharp, moderate, and gradual), and variation in the effective reflective plane size appeared to be a major determinant of this property. The same material showed different degrees of reflection depending on the surface profile. The size of grating lobes was affected by variation in the reflective plane size, but not by the intensity of reflection. The brightness of the grating lobes was similar among specimens.

Conclusions

These results suggest that echo dropout and grating lobes can be effectively eliminated by an appropriate surface profile; thus, a likely practical solution would be to manufacture a surface that provides an adequate reflective surface size at various incident angles.

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Acknowledgements

This work was supported by JSPS KAKENHI Grant number 25461952. The authors would like to thank Mr. Kenichi Yagyu for technical support in preparing the mounted specimens.

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Authors and Affiliations

  1. Center for Innovative and Translational Medicine, Kochi Medical School, Nankoku, Japan

    Shunsuke Asakura & Saki Nishikawa

  2. Second Department of Surgery, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan

    Kazumasa Orihashi

  3. Research Institute, Kochi University of Technology, Kochi, Japan

    Yoshio Inoue

Authors
  1. Shunsuke Asakura
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  2. Saki Nishikawa
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  3. Kazumasa Orihashi
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  4. Yoshio Inoue
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Corresponding author

Correspondence to Kazumasa Orihashi.

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Conflict of interest

Shunsuke Asakura and the other co-authors have no conflict of interest.

Ethical statement

This article does not contain any studies with human or animal subjects performed by any of the authors.

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Asakura, S., Nishikawa, S., Orihashi, K. et al. Optimal surface property for three-dimensional echo visualization. J Med Ultrasonics 45, 213–222 (2018). https://doi.org/10.1007/s10396-017-0831-4

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  • DOI: https://doi.org/10.1007/s10396-017-0831-4

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