ECG-Gated Interventional Cardiac Reconstruction for Non-periodic Motion

The 3-D reconstruction of cardiac vasculature using C-arm CT is an active and challenging field of research. In interventional environments patients often do have arrhythmic heart signals or cannot hold breath during the complete data acquisition. This important group of patients cannot be reconstructed with current approaches that do strongly depend on a high degree of cardiac motion periodicity for working properly. In a last year's MICCAI contribution a first algorithm was presented that is able to estimate non-periodic 4-D motion patterns. However, to some degree that algorithm still depends on periodicity, as it requires a prior image which is obtained using a simple ECG-gated reconstruction. In this work we aim to provide a solution to this problem by developing a motion compensated ECG-gating algorithm. It is built upon a 4-D timecontinuous affine motion model which is capable of compactly describing highly non-periodic motion patterns. A stochastic optimization scheme is d...

• Type: Journal
• Year: 2010
• Where: MICCAI
• Authors: Christopher Rohkohl, Günter Lauritsch, Lisa Biller, Joachim Hornegger
• Keywords: Algorithm, Data Acquisition, Medical Imaging, MICCAI 2010, Motion Patterns