US 12,433,688 B2
Method and system for vascular catheter tip detection in medical images
Rui Liao, Princeton Junction, NJ (US); Venkatesh Narasimha Murthy, Hillsborough, NJ (US); Yue Zhang, Jersey City, NJ (US); and Abdoul Aziz Amadou, London (GB)
Assigned to Siemens Healthineers AG, Forchheim (DE)
Filed by SIEMENS HEALTHINEERS AG, Forchheim (DE)
Filed on Aug. 9, 2023, as Appl. No. 18/446,516.
Claims priority of application No. 22197534 (EP), filed on Sep. 23, 2022.
Prior Publication US 2024/0099784 A1, Mar. 28, 2024
Int. Cl. A61B 34/20 (2016.01); A61B 6/00 (2006.01); A61B 6/12 (2006.01); G06T 7/246 (2017.01); G06T 7/277 (2017.01); G06T 7/73 (2017.01); G16H 30/40 (2018.01); A61M 25/01 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 6/12 (2013.01); A61B 6/481 (2013.01); G06T 7/248 (2017.01); G06T 7/277 (2017.01); G06T 7/73 (2017.01); G16H 30/40 (2018.01); A61B 2034/2065 (2016.02); A61M 2025/0166 (2013.01); G06T 2207/10016 (2013.01); G06T 2207/10116 (2013.01); G06T 2207/20132 (2013.01); G06T 2207/30021 (2013.01); G06T 2207/30101 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A computer-implemented method for detecting a tip of a vascular catheter in a sequence of vessel image frames obtained using x-rays, the method comprising:
acquiring the sequence of vessel image frames;
determining, within the vessel image frames, a proximal point, the proximal point corresponding to a vessel ostium;
cropping the sequence of vessel image frames to an image area surrounding the proximal point, resulting in a cropped sequence of cropped vessel image frames;
detecting in real time with the acquisition, within cropped vessel image frames not indicative of a contrast medium, the tip of the vascular catheter;
tracking substantially concurrently with the detecting, within the sequence of vessel image frames, the detected tip of the vascular catheter; and
comparing a detected position of the tip of the vascular catheter, the detected position being output by the detecting of the tip of the vascular catheter with a tracked position of the tip of the vascular catheter, the tracked position being output by the tracking of the detected tip of the vascular catheter;
when the detected position and the tracked position differ by less than a position difference threshold, treating the detected position as a valid position of the tip of the vascular catheter; and
when the detected position and the tracked position differ by more than the position difference threshold, treating the tracked position as the valid position of the tip of the vascular catheter.