Assessing Cardiac Dynamics based on X-Ray Coronary Angiograms

Abstract

The problem of quantitatively assessing cardiac motion including global and local dynamic performances during cardiac cycles is addressed. In vivo X-ray coronary angiographic image sequences covering several cardiac cycles are used as source image data. The three-dimensional (3-D) surface of the heart based on extended superquadrics (ESQ) surface model in each phase is constructed from 3-D coronary vessel skeletons, which are reconstructed from a pair of nearly orthogonal angiographic sequences. Complex dynamic performances of the heart are decomposed into global and local components according to a priori anatomical and dynamic knowledge that have been confirmed by medical observations and non-rigid motion theory. Parameters of all components are quantitatively estimated through motion decomposition and compensation. Consequently, cardiac dynamics during cardiac cycles are comprehensively depicted with quantitative parameters. Validation of the proposed method with clinically acquired in vivo image data has been carried out, the results of which have verified the feasibility and accuracy of the proposed method

Device Motion Indication Guidance Reduces Longitudinal Geographical Miss Occurrence during Implantation of Coronary Stents

“…Retrospectively judged GM was reported in 67% of the participants and was associated with significantly increased risk of target vessel revascularization (TVR) and myocardial infarction (MI).Essentially, the coronary arteries follow the dynamic geometric changes of the heart during the cardiac cycle, as their displacement tracks that of the contiguous epicardium. These orchestrated movements led Zheng Sun et al [5] to even advocate the extraction of myocardial dynamic information through estimating coronary arterial motion field.The SyncVision™ System (Sync-Rx, Netanya, Israel) is an add-on image processing system with unique enhancement and stabilization power. Using the novel feature of this system, the DMI, we were previously able to delineate the typical device movement measurement (DMM) at the different coronary segments [6].…”

“…Essentially, the coronary arteries follow the dynamic geometric changes of the heart during the cardiac cycle, as their displacement tracks that of the contiguous epicardium. These orchestrated movements led Zheng Sun et al [5] to even advocate the extraction of myocardial dynamic information through estimating coronary arterial motion field.…”