小林 浩一¹, 岡井 崇¹, 武谷 雄二¹, 藤沢 昭三², 水川 晴夫², 佐藤 拓宋³, 山越 芳樹⁴

Koichi KOBAYASHI¹, Takashi OKAI¹, Yuji TAKETANI¹, Shozo FUJISAWA², Haruo MIZUKAWA², Takuso SATO³, Yoshiki YAMAKOSHI⁴

¹東京大学産婦人科, ²稲田登戸病院, ³東京工業大学大学院, ⁴群馬大学電気電子工学科

¹Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, ²Inada Noborito Hospital, ³Tokyo Institute of Technology, ⁴Gunma University

キーワード : Sonoelasticity imaging, Tissue characterization, Uterus, Uterine myoma, Adenomyosis

We measured the velocity of the propagation of low-frequency vibration in the uterus in vitro and in vivo, to evaluate a usefulness of the sonoelasticity imaging system developed by us for ultrasonic tissue characterization. In the in vitro study, the average velocity in the leiomyoma tissue was 1195±800 (mean±SD) cm/s. and in the adenomyosis 727±272 cm/s., which as significantly lower than in the leiomyomas (pin vivo study, the mean velocities in 27 cases of leiomyoma, five cases of adenomyosis, and five normal uteri were 1202±439, 908±322, and 526±159 cm/s., respectively. We therefore conclude that this system is useful for determining tissue characteristics in a clinical setting.