Abstract #2252

Stabilized decompositions for improved cardiac self-gating: A proof-of-concept in single breath-hold 3D cine imaging

Anna Padée¹, Lorenzo Di Sopra², John Heerfordt^2,3, Jérôme Yerly^2,4, Marco Merlo¹, Tobias Kober^2,3,5, Davide Piccini^2,3,5, Matthias Stuber^2,4, Christopher Roy², and Jonas Richiardi^2,3

¹Laboratory for Psychiatric Neuroscience and Psychotherapy, University of Fribourg, Fribourg, Switzerland, ²Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, ³Advanced Clinical Imaging Technology, Siemens Healthcare, Lausanne, Switzerland, ⁴Center for Biomedical Imaging, Lausanne, Switzerland, ⁵LTS5, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

ECG recording during whole heart MR imaging requires extra setup time and is not always reliable. Recently, self-gated (SG) acquisition techniques have been developed, which extract the cardiac signal from k-space center amplitude modulations. Here, we investigated whether different single- (Empirical Mode Decomposition (EMD), Ensemble EMD (EEMD)) and multi-coil (PCA, ICA with novel stabilisation) decomposition methods yielded SG triggers with minimal variability to ECG R-wave location. EEMD yielded median variability similar to PCA. Compared to PCA, our proposed stabilised ICA approach yielded SG triggers with 66% lower variability (median over 5 subjects), although not for all subjects.

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