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Small calcification depiction in ultrasound B-mode images using decorrelation of echoes caused by forward scattered waves

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Abstract

Purpose

The purpose of this study is to propose a novel method to depict small calcifications in ultrasound B-mode images using decorrelation of forward scattered waves with no decrease in the frame rate.

Methods

Since the waveform of an ultrasound pulse changes when it passes through a calcification location, the echo waveform from regions behind the calcification is quite different from that without a calcification. This indicates that the existence of a calcification is predictable based upon the waveform difference between adjacent scan lines by calculating cross-correlation coefficients. In addition, a high-intensity echo should return from the calcification itself. Therefore, the proposed method depicts the high-intensity echo positions with posterior low correlation coefficient regions.

Results

Eleven of 15 wires 0.2–0.4 mm in diameter were depicted using this method, yielding a sensitivity of 73.3% and a specificity of 100%, even though they might go undetected under clinical inspection of ultrasound B-mode images.

Conclusion

This study suggests that an US device could perform well in terms of calcification detection.

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Acknowledgments

This work is partly supported by the Research and Development Committee Program of the Japan Society of Ultrasonics in Medicine and the Innovative Techno-Hub for Integrated Medical Bio-imaging Project of the Special Coordination Funds for Promoting Science and Technology from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.

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Correspondence to Hirofumi Taki.

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Taki, H., Sakamoto, T., Yamakawa, M. et al. Small calcification depiction in ultrasound B-mode images using decorrelation of echoes caused by forward scattered waves. J Med Ultrasonics 38, 73–80 (2011). https://doi.org/10.1007/s10396-011-0298-7

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  • DOI: https://doi.org/10.1007/s10396-011-0298-7

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