Monitoring of lesion induced by high-intensity focused ultrasound using correlation method based on block matching

Ryo Matsuzawa, Takashi Shishitani, Shin Yoshizawa, Shin Ichiro Umemura

研究成果: Article査読

28 被引用数 (Scopus)

抄録

High-intensity focused ultrasound (HIFU) is a noninvasive therapeutic application that focuses ultrasound to the target tissue, such as a malignant tumor, and thermally coagulates it. Monitoring methods for evaluating the formation of thermal lesions induced by HIFU are required to perform safe and accurate HIFU treatment. However, the conventional ultrasonic B-mode image incurs difficulties in assessing the formation of HIFUinduced lesions. In this study, ultrasound RF signals were acquired during HIFU exposure. A correlation coefficient was used to evaluate the changes occurring in the RF signals backscattered from the thermal lesion. Also, a block matching algorithm has been implemented to compensate the tissue motion during HIFU exposure. The experimental results show that correlation coefficients in the focal spot decreased significantly with HIFU exposure, which indicates that the backscattered RF signals changed owing to tissue coagulation.

本文言語English
論文番号07GF26
ジャーナルJapanese journal of applied physics
51
7 PART2
DOI
出版ステータスPublished - 2012 7

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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