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Abstract #0020

Free-running isotropic whole-heart T2 mapping with ECG-free Pilot Tone navigation

Simone Rumac1, Christopher W. Roy1, Jérôme Yerly1, Mariana B. L. Falcao1, Aurélien Bustin1,2,3, Mario Bacher1,4, Peter Speier4, Matthias Stuber1,5, and Ruud B. van Heeswijk1
1Department of Radiology, Lausanne University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, 2IHU LIRYC, Electrophysiology and Heart Modeling Institute, INSERM U1045, Centre de recherche Cardio-Thoracique de Bordeaux, Université de Bordeaux, Bordeaux, France, 3Cardiovascular Imaging, Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Bordeaux, France, 4Siemens Healthcare GmbH, Erlangen, Germany, 5CIBM Center for BioMedical Imaging, Lausanne, Switzerland, Lausanne, Switzerland


The most commonly employed T2 mapping techniques are 2D and make use of ECG-triggering. This may be a limitation in patients with variable heart rate and complex three-dimensional conditions. To address these limitations, we here propose an isotropic free-running 3D T2 mapping technique that avoids ECG triggering by using Pilot Tone navigation. In three healthy volunteers, our technique produced accurate isotropic T2 maps when compared to 2D T2 prepared bSSFP (T2=41.1±4.8ms vs. 44.9±3.3ms, respectively, p=0.1), and cardiac motion was successfully resolved.

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