Handheld Real-Time LED-Based Photoacoustic and Ultrasound Imaging System for Accurate Visualization of Clinical Metal Needles and Superficial Vasculature to Guide Minimally Invasive Procedures. - Wenfeng Xia 001; Mithun Kuniyil Ajith Singh; Efthymios Maneas; Naoto Sato; Yusuke Shigeta; Toshitaka Agano; Sébastien Ourselin; Simeon J. West; Adrien E. Desjardins (Sensors, 2018)