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Abstract #0599

Initial results for MRI-guided catheterization in children and young adults with congenital heart disease using the partial saturation (pSAT) sequence

Mari Nieves Velasco Forte1,2, Sébastien Roujol3, Bram Ruijsink3, Isra Valverde4, Phuoc Duong4, Sascha Krueger5, Tobias Schaeffter6, Steffen Weiss7, Surendranath Veeram Reddy8, Tarique Hussain8, Kuberan Pushparajah4, and Reza Razavi4

1Division of Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom, 2Paediatric Cardiology, Queen Elizabeth University Hospital, Glasgow, United Kingdom, 3Division of Imaging and Biomedical Engineering, King's College London, London, United Kingdom, 4King's College London, London, United Kingdom, 5Philips, Hamburg, Germany, 6Physikalisch-Technische Bundesanstalt, Berlin, Germany, 7Philips Research Laboratories, Hamburg, Germany, 8UT Southwestern Medical Center, Dallas, TX, United States

CMR is a promising alternative to x-ray fluoroscopy for the guidance of cardiac catheterization procedures. We have recently developed a partial saturation (pSAT) sequence which enables passive tracking of balloon-wedge catheters with positive contrast, using a dilution containing gadolinium. 23 patients from 2 different centres were recruited. MRI-guidance was performed using the pSAT sequence applied in the iSuite platform® or an interactive imaging mode. During real-time MRI catheterization the balloon was visualized during 64±19% of the scanning time. pSAT angle was 30-50° in all patients. Mean subjective image quality scores were 3.7 out of 5 for heart visualisation and 4.6/5 for balloon/blood contrast.

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