Three-Dimensional Registration of Freehand-Tracked Ultrasound to CT Images of the Talocrural Joint. - Nazli Tümer; Aimee C. Kok; Frans M. Vos; Geert J. Streekstra; Christian Askeland; Gabriëlle G. M. Tuijthof; Amir Abbas Zadpoor (Sensors, 2018)