US 12,405,336 B2
Characterization of distortions in magnetic resonance imaging
Thomas Puiseux, Toulouse (FR); Anou Sewonu, Saint-Herblain (FR); and Ramiro Moreno, Toulouse (FR)
Assigned to Alara Expertise, Entzheim (FR); and Spin Up, Entzheim (FR)
Appl. No. 18/255,822
Filed by Alara Expertise, Entzheim (FR); and Spin Up, Entzheim (FR)
PCT Filed Dec. 1, 2021, PCT No. PCT/FR2021/052173
§ 371(c)(1), (2) Date Jun. 2, 2023,
PCT Pub. No. WO2022/117957, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2012544 (FR), filed on Dec. 2, 2020.
Prior Publication US 2024/0012081 A1, Jan. 11, 2024
Int. Cl. G01R 33/58 (2006.01); A61B 6/58 (2024.01); G01R 33/563 (2006.01)
CPC G01R 33/58 (2013.01) [A61B 6/583 (2013.01); G01R 33/56308 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for calibrating a piece of MRI tomography equipment to compensate for degradations in quality of images provided by the equipment to be calibrated and caused by malfunction of the equipment to be calibrated, MRI sequence limitations or image artifacts, the method comprising a step of determining an origin of the degradations in the quality of the images, the step comprising:
constructing a pair of phantoms comprising a physical phantom and a digital twin phantom;
determining a virtual image of the digital twin phantom on a basis of the characteristics of a piece of MRI equipment to be tested;
carrying out an MRI sequence with the physical phantom; and
verifying the virtual and a real image, wherein the digital twin phantom is produced by solving Bloch equations on-the-fly, without recording spin trajectories, applied to the characteristics of the physical phantom as a function of the characteristics of the reference sequence.