Abstract #0689

Multi-vendor validation and reproducibility of 4D flow MRI using 4-fold parallel imaging acceleration with and without respiratory gating

Johannes Töger¹, Jelena Bock¹, Sebastian Bidhult^1,2, Karin Markenroth Bloch^3,4, Mikael Kanski¹, Håkan Arheden¹, Frederik Testud⁵, Andreas Greiser⁶, Einar Heiberg^1,2, and Marcus Carlsson¹

¹Clinical Physiology, Department of Clinical Sciences, Skane University Hospital, Lund University, Lund, Sweden, ²Department of Biomedical Engineering, Faculty of Engineering, Lund University, Lund, Sweden, ³Lund University Bioimaging Center, Lund University, Lund, Sweden, ⁴Philips Healthcare, Lund, Sweden, ⁵Siemens Healthcare AB, Malmö, Sweden, ⁶Siemens Healthcare GmbH, Erlangen, Germany

4D-flow sequences on two 1.5T scanners from different vendors (Philips Achieva dStream and Siemens MAGNETOM Aera) were validated head-to-head. 4D-flow in a pulsatile flow phantom showed high accuracy and precision compared to reference laser particle image velocimetry for both scanners. 2D-flows in ascending and descending aorta and pulmonary trunk were compared to 57 4D-flow scans in 10 subjects. Lower bias for flow volumes was found on Aera (-4.7±12.5%) compared to Achieva (-18.0±20.1%). Kinetic energy showed lower bias for repeated examinations at the same scanner compared to different scanners the same day. 4D-flow without respiratory gating on Aera showed acceptable quality.

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