US 12,484,862 B2
Method and system for reconstructing a 3D medical image
Arnaud Pierre, Gieres (FR); Karim Ferhat, Gieres (FR); and Gautier Daune, Gieres (FR)
Assigned to ECENTIAL ROBOTICS, Gieres (FR)
Appl. No. 18/288,341
Filed by ECENTIAL ROBOTICS, Gieres (FR)
PCT Filed Jun. 28, 2022, PCT No. PCT/EP2022/067795
§ 371(c)(1), (2) Date Oct. 25, 2023,
PCT Pub. No. WO2023/275087, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 21305891 (EP), filed on Jun. 29, 2021.
Prior Publication US 2024/0215932 A1, Jul. 4, 2024
Int. Cl. A61B 6/02 (2006.01); A61B 6/00 (2024.01); A61B 6/10 (2006.01); G06T 15/08 (2011.01)
CPC A61B 6/027 (2013.01) [A61B 6/102 (2013.01); A61B 6/4441 (2013.01); A61B 6/4476 (2013.01); A61B 6/488 (2013.01); A61B 6/547 (2013.01); G06T 15/08 (2013.01); G06T 2200/04 (2013.01); G06T 2210/41 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for reconstructing a 3D medical image of a region of interest of a patient's body lying on an operating table with an X-ray imaging system comprising a motorized C-arm supporting an X-ray source, an X-ray image detector and an anti-collision device adapted to detect an external surface of the patient's body, the method comprising:
implementing a first path of the motorized C-arm without acquiring any X-ray image, said first path comprising at least two different angular positions around a rotation axis of the C-arm;
at each angular position of the C-arm along said first path, detecting with the anti-collision device an external surface of the patient's body and recording volumetric data of a patient's body portion enclosing the region of interest;
computing a volumetric model of the patient's body portion based on said volumetric data and on an estimation of X-ray absorption of patient's body tissues surrounding the region of interest, said volumetric model comprising a first part including the region of interest and at least one second part distinct from the first part, the first and second parts presenting different levels of X-ray absorption;
implementing a second path of the motorized C-arm and acquiring a 2D X-ray image at each angular position of the C-arm along said second path;
reconstructing a 3D medical image from the acquired 2D X-ray images, wherein said reconstructing comprises estimating, for each X-ray passing through a voxel of the 3D medical image, a level of X-ray absorption by the patient's body based on the volumetric model of the patient's body portion and adjusting a contribution of said X-ray to each voxel of the 3D medical image based on said estimated level.