Omnidirectional Monolithic Marker for Intra-Operative MR-Based Positional Sensing in Closed MRI. - Chim Lee Cheung; Mengjie Wu; Ge Fang; Justin D. L. Ho; Liyuan Liang; Kel Vin Tan; Fa-Hsuan Lin; Hing-Chiu Chang; Ka-Wai Kwok (IEEE Trans. Medical Imaging, 2024)