High-speed Freehand Tissue Elasticity Imaging for Breast Diagnosis

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  • Yamakawa Makoto
    Institute of Information Sciences and Electronics, University of Tsukuba
  • Nitta Naotaka
    Institute of Information Sciences and Electronics, University of Tsukuba
  • Shiina Tsuyoshi
    Institute of Information Sciences and Electronics, University of Tsukuba
  • Matsumura Takeshi
    Research & Development Center, Hitachi Medical Corporation
  • Tamano Satoshi
    Research & Development Center, Hitachi Medical Corporation
  • Mitake Tsuyoshi
    Research & Development Center, Hitachi Medical Corporation
  • Ueno Ei
    Institute of Clinical Medicine, University of Tsukuba

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Abstract

Tissue elasticity imaging technology is expected to be a new technique for breast disease diagnosis. In clinical measurement, high-speed and freehand manipulation of the probe is required for a practical system. Thus, we developed a tissue elasticity imaging system which performs a stable strain measurement with freehand tissue compression based on the extended combined autocorrelation method. The method enables us to obtain tissue strain distribution at high-speed and suppressing errors due to lateral slip of the probe caused by freehand compression. The developed method can estimate the strain images at about 5 frames/s and was applied to breast disease measurement in vivo. Consequently, it is shown that the system is effective not only for the diagnosis of tissue hardness but also to determine the disease expansion area. It is also confirmed that the method can stably estimate the strain during the breast measurement in vivo.

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