Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ken Yamamoto and Keiji Sakai and Kenshiro Takagi and Masahiro Ohno and Akira Kokubo,Aberration-free ultrasonic C-mode imaging system with an ultrasonic phase conjugator,SPIE Proceedings,0277-786X,SPIE,1999-02-08,3585,,359-366,https://cir.nii.ac.jp/crid/1873679867534485504,https://doi.org/10.1117/12.339867