Yuichiro Ikeda Syoji Kobashi Katsuya Kondo Yutaka Hata Fuzzy ultrasonic array system for locating screw holes of intramedullary nail. 3428-3432 2007 SMC http://dx.doi.org/10.1109/ICSMC.2007.4414067 conf/smc/2007 db/conf/smc/smc2007.html#IkedaKKH07