US 11,944,778 B2
Methods and systems for automatic pullback trigger
Badr Elmaanaoui, Belmont, MA (US)
Assigned to Canon U.S.A., Inc., Melville, NY (US)
Filed by Canon U.S.A., Inc., Melville, NY (US)
Filed on Jul. 21, 2021, as Appl. No. 17/381,762.
Claims priority of provisional application 63/133,946, filed on Jan. 5, 2021.
Claims priority of provisional application 63/062,237, filed on Aug. 6, 2020.
Prior Publication US 2022/0040402 A1, Feb. 10, 2022
Int. Cl. A61B 5/00 (2006.01); A61M 5/00 (2006.01); G06V 10/25 (2022.01)
CPC A61M 5/007 (2013.01) [A61B 5/0066 (2013.01); G06V 10/25 (2022.01)] 14 Claims
OG exemplary drawing
 
9. A method for triggering an automatic pullback, the method comprising:
collecting image data from an object, target, or sample, and obtaining or identifying a reference frame for a region of interest (ROI) in the image data;
determining an amount of a change in an image intensity of each of one or more other frames of the image data showing the region of interest (ROI) relative to an image intensity of the region of interest (ROI) shown or as in the reference frame;
determining whether the amount of, or a level in, the change for each of the one or more other frames of the image data showing the region of interest (ROI) indicates that a partial clearing or a diagnostic clearing of the object, target, or sample is or has been achieved where a clearance metric is above a threshold; and
issuing a signal based on the determined amount of, or the determined level in, the change indicating that the partial clearing or the diagnostic clearing of the object, target, or sample is or has been achieved and based on the clearance metric being above the threshold, the signal operating to be used to trigger the automatic pullback.