@article{CTT100546425,
  author = {Tadashi Yamaguchi and Hiroyuki Hachiya and Naohisa Kamiyama and Kazuki Ikeda and Fuminori Moriyasu},
  title = {Estimation of Characteristics of Echo Envelope Using RF Echo Signal from the Liver},
  journal = {Jpn. J. Appl. Phys.},
  year = 2001,
}