I have the same issue.
I sent an email to the author that I could find here.
BubblyYi/Coronary-Artery-Tracking-via-3D-CNN-Classification: The PyTorch re-implement of a 3D CNN Tracker to extract coronary artery centerlines with state-of-the-art (SOTA) performance. (paper: ‘Coronary artery centerline extraction in cardiac CT angiography using a CNN-based orientation classiﬁer’) (github.com) 2
You should send one yourself