Laser Resonance Frequency Analysis: A Novel Measurement Approach to Evaluate Acetabular Cup Stability During Surgery. - Shunsuke Kikuchi; Katsuhiro Mikami; Daisuke Nakashima; Toshiyuki Kitamura; Noboru Hasegawa; Masaharu Nishikino; Arihiko Kanaji; Masaya Nakamura; Takeo Nagura (Sensors, 2019)