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 Forte^1,2, 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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