Nonrigid 2D registration of fluoroscopic coronary artery image sequence with propagated deformation field.
Published in SPIE Medical Imaging, 2017
Authors: Taewoo Park, Seung Yeon Shin, Youngtaek Hong, Soochahn Lee, Hyuk-Jae Chang, Il Dong Yun
TL;DR: A nonrigid 2D registration method for fluoroscopic coronary artery sequences that propagates deformation fields across frames to handle cardiac motion.
What this paper is about
Coronary artery images from fluoroscopic X-ray sequences are distorted by cardiac and respiratory motion between frames. Registering these frames to each other is needed for tasks like vessel tracking and motion compensation, but the deformation is nonrigid and changes continuously.
Key idea
Two stages of our registration methodology of whole coronary artery image sequence. (left & middle) intra stage, (right) inter stage
The paper proposes propagating deformation fields across the fluoroscopic image sequence, using the estimated deformation from neighboring frames to initialize and constrain the registration of subsequent frames. This temporal propagation provides a good starting point for each frame’s registration and improves overall alignment accuracy.
Why it matters
Better nonrigid registration of coronary artery sequences enables more accurate motion compensation during cardiac interventions, supporting improved visualization and analysis of vessel dynamics.