Robust Tracking with Particle Filtering for Fluorescent Cardiac Imaging
This enables real-time quality control during coronary bypass surgery by providing robust tracking for cardiac perfusion estimates, though it is incremental as it builds on particle filtering with cyclic consistency checks.
The paper tackles the problem of tracking local feature points in fluorescent cardiac imaging for estimating cardiac perfusion, which is challenging due to heart motion and image fluctuations, and achieves a tracking error of 5.00 +/- 0.22 px, outperforming other methods.
Intraoperative fluorescent cardiac imaging enables quality control following coronary bypass grafting surgery. We can estimate local quantitative indicators, such as cardiac perfusion, by tracking local feature points. However, heart motion and significant fluctuations in image characteristics caused by vessel structural enrichment limit traditional tracking methods. We propose a particle filtering tracker based on cyclicconsistency checks to robustly track particles sampled to follow target landmarks. Our method tracks 117 targets simultaneously at 25.4 fps, allowing real-time estimates during interventions. It achieves a tracking error of (5.00 +/- 0.22 px) and outperforms other deep learning trackers (22.3 +/- 1.1 px) and conventional trackers (58.1 +/- 27.1 px).