US 12,167,941 B2
System and method for spatial positioning of magnetometers
Fan Wang, Beijing (CN); Yan Zhuo, Beijing (CN); and Sijia Yang, Beijing (CN)
Assigned to COGNITIVE MEDICAL IMAGING LTD., Beijing (CN); and INSTITUTE OF BIOPHYSICS, CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Appl. No. 17/780,750
Filed by COGNITIVE MEDICAL IMAGING LTD., Beijing (CN); and INSTITUTE OF BIOPHYSICS, CHINESE ACADEMY OF SCIENCES, Beijing (CN)
PCT Filed Nov. 26, 2020, PCT No. PCT/CN2020/131747
§ 371(c)(1), (2) Date May 27, 2022,
PCT Pub. No. WO2021/104368, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 201911190087.2 (CN), filed on Nov. 28, 2019.
Prior Publication US 2022/0409328 A1, Dec. 29, 2022
Int. Cl. A61B 90/00 (2016.01)
CPC A61B 90/39 (2016.02) [A61B 2090/3983 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A system for spatial positioning of magnetometers, comprising:
magnetometers configured to obtain magnetic field data related to magnetoencephalography or biological magnetic fields of other parts;
a magnetometer bracket fixedly disposed relative to the head or other body parts of a subject, and the magnetometer bracket comprising at least one mounting part with an orientation allowing the magnetometers to be respectively disposed at the mounting part along a specific direction at a first depth;
a first positioning marker being a non-rotational-symmetric pattern, the first positioning marker being respectively disposed in association with the magnetometers;
a photogrammetry system comprising photographing devices, configured to photograph the first positioning marker to obtain first image data of the first positioning marker, by at least one of the photographing devices, at at least two photographing sites of a plurality of photographing sites; and
a controller configured to receive the first image data obtained by the photographing devices, and to calculate a spatial location and a spatial orientation of the first positioning marker based on pre-obtained system parameters and the first image data and thus calculate a spatial location and a spatial orientation of the magnetometers.