US 12,462,371 B2
Computer-implemented method and apparatus for characterizing a flexible tube
Michael Atlan, Paris (FR); Stefan Catheline, Lyons (FR); Gabrielle Laloy-Borgna, Lyons (FR); and Léo Puyo, Lûbeck (DE)
Assigned to INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE (INSERM)—RAISON SOCIALE OBSOLETE, Paris (FR); CENTRE LEON BERARD, Lyons (FR); UNIVERSITE CLAUDE BERNARD LYON 1, Villeurbanne (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); and CENTRE HOSPITALIER NATIONAL D'OPTHALMOLOGIE QUINZE-VINGTS, Paris (FR)
Appl. No. 18/563,087
Filed by INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE, Paris (FR); CENTRE LEON BERARD, Lyons (FR); UNIVERSITÉ CLAUDE BERNARD LYON 1, Villeurbanne (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); and CENTRE HOSPITALIER NATIONAL D'OPHTALMOLOGIE QUINZE-VINGTS, Paris (FR)
PCT Filed May 25, 2022, PCT No. PCT/EP2022/064318
§ 371(c)(1), (2) Date Nov. 21, 2023,
PCT Pub. No. WO2022/248613, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 21305715 (EP), filed on May 28, 2021.
Prior Publication US 2024/0242331 A1, Jul. 18, 2024
Int. Cl. G06T 7/00 (2017.01); A61B 3/12 (2006.01); A61B 5/00 (2006.01); A61B 8/00 (2006.01); A61B 8/06 (2006.01)
CPC G06T 7/0006 (2013.01) [A61B 3/1241 (2013.01); A61B 5/4851 (2013.01); A61B 8/06 (2013.01); A61B 8/488 (2013.01); G06T 7/0012 (2013.01); G06T 2207/30104 (2013.01); G06T 2207/30181 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A process for characterizing a flexible tube, said process including at least the following further steps:
a) obtaining with a camera a first dataset of image data relating to spatiotemporal deformations of the tube, on a given period of time;
b) detecting a wall inner surface of the tube and its diameter and storing the corresponding data in a memory, in the form of a second dataset;
c) identifying a number of transverse sections of the tube in the dataset;
d) computing, for each section of the tube and at a given instant during the given period of time, an average particle velocity over this section;
e) based on the average particle velocity computed at step d), computing a wave propagation speed of an antisymmetric wave generated in the tube by the liquid flowing within the tube;
f) based on the wave propagation speed computed at step e) and on the diameter detected at step b), assessing a shear elasticity modulus of the flexible tube.