US 11,928,828 B2
Deformity-weighted registration of medical images
Sebastian Stopp, Munich (DE)
Assigned to BRAINLAB AG, Munich (DE)
Appl. No. 17/603,280
Filed by Brainlab AG, Munich (DE)
PCT Filed May 28, 2019, PCT No. PCT/EP2019/063719
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2020/239200, PCT Pub. Date Dec. 3, 2020.
Prior Publication US 2022/0189045 A1, Jun. 16, 2022
Int. Cl. G06T 7/33 (2017.01); A61B 34/10 (2016.01)
CPC G06T 7/337 (2017.01) [A61B 34/10 (2016.02); A61B 2034/105 (2016.02); G06T 2207/10081 (2013.01); G06T 2207/10088 (2013.01); G06T 2207/30004 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A computer-implemented medical method of determining a spatial relationship between planning image data and current surface data, the method comprising the following steps:
acquiring planning image data which describes a three-dimensional medical image of an anatomical body part having an external surface;
acquiring current surface data which describes a current surface scan describing the external surface;
acquiring atlas data which describes a model of the external surface and confidence values for elements of the external surface which describe a probability for the geometry of the external surface to be subject to a change;
determining confidence assignment data based on the atlas data and the current surface data, wherein the confidence assignment data describes an assignment of the confidence values for elements of the external surface described by the atlas data to the corresponding elements of the external surface described by the current surface scan;
determining registration data based on the planning image data and the current surface data and the confidence assignment data;
wherein the registration data describes a spatial relationship between the external surface described by the planning image data and the external surface described by the current surface data; and further
wherein the spatial relationship is weighted for the elements of the external surface according to the confidence value assigned to the respective element.