US 12,092,710 B2
MRI tracking device design, fabrication, and methods of use for MRI-guided robotic system
Ka Wai Kwok, Hong Kong (CN); Chim Lee Cheung, Hong Kong (CN); Di-Lang Justin Ho, Hong Kong (CN); Ziyan Guo, Guangxi (CN); Hing Chiu Chang, Macau (CN); and Varut Vardhanabhuti, Hong Kong (CN)
Assigned to The University of Hong Kong, Hong Kong (CN)
Appl. No. 16/965,888
Filed by THE UNIVERSITY OF HONG KONG, Hong Kong (CN)
PCT Filed Mar. 11, 2019, PCT No. PCT/IB2019/051945
§ 371(c)(1), (2) Date Jul. 29, 2020,
PCT Pub. No. WO2019/171357, PCT Pub. Date Sep. 12, 2019.
Claims priority of provisional application 62/640,798, filed on Mar. 9, 2018.
Prior Publication US 2021/0003644 A1, Jan. 7, 2021
Int. Cl. G01R 33/28 (2006.01); A61B 5/055 (2006.01); A61B 90/00 (2016.01); G01B 7/28 (2006.01); G01B 11/24 (2006.01); A61B 34/20 (2016.01); G01R 33/34 (2006.01); G01R 33/36 (2006.01)
CPC G01R 33/286 (2013.01) [A61B 5/055 (2013.01); A61B 90/39 (2016.02); G01B 7/28 (2013.01); G01B 11/24 (2013.01); A61B 2034/2061 (2016.02); A61B 2090/3958 (2016.02); G01R 33/287 (2013.01); G01R 33/34084 (2013.01); G01R 33/3642 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A magnetic resonance imaging inductively-coupled wireless tracking marker for three-dimensional positional tracking comprising:
a plurality of double layered flexible printed circuit sheets (202), wherein each of the double layered flexible printed circuit sheets (202) is encapsulated in a biocompatible and magnetic resonance compatible material;
a first conductive planar coil (203) and a second conductive planar coil (203) disposed on a first side and a second side, respectively, of each of the double layered flexible printed circuit sheets (202), wherein each of the double layered flexible printed circuit sheets (202) is bonded together to at least one other of the double layered flexible printed circuit sheets (202) with an adhesive to form a multilayer coil, wherein each of the first conductive planar coil and the second conductive planar coil has a resonant frequency corresponding to a Larmor frequency of a magnetic resonance imaging scanner, wherein each of the first conductive planar coil forms a first spiral inductor, wherein each of the second conductive planar coil forms a second spiral inductor, wherein the first conductive planar coil (203) and the second planar coil (203) are respectively coupled to each other to provide a mutual coupling effect therebetween;
a first planar parallel plate capacitor (205) connected to each of the first conductive planar coils (203) and a second planar parallel plate capacitor (205) connected to each of the second conductive planar coils (203); and
a plurality of vias comprising a magnetic resonance imaging-compatible non-ferromagnetic material and electrically connecting the first conductive planar coil (203) of each double layered flexible printed circuit sheet (202) to the second conductive planar coil (203) of said double layered flexible printed circuit sheet (202) and to the first conductive planar coil (203) and the second conductive planar coil (203) of each other double layered flexible printed circuit sheet (202),
wherein each of the first conductive planar coil (203) and the second conductive planar coil (203) comprising the magnetic resonance imaging-compatible non-ferromagnetic material.