Real-Time Magnetic Resonance Imaging–Guided Transarterial Aortic Valve Implantation

• Published in: Journal of the American College of Cardiology Vol. 59; no. 2; pp. 192 - 193
• Main Authors: Kahlert, Philipp, MD, Parohl, Nina, DVM, Albert, Juliane, MSc, Schäfer, Lena, RT, Reinhardt, Renate, MD, Kaiser, Gernot M., MD, McDougall, Ian, BASc, Decker, Brad, BASc, Plicht, Björn, MD, Erbel, Raimund, MD, Eggebrecht, Holger, MD, Ladd, Mark E., PhD, Quick, Harald H., PhD
• Format: Journal Article
• Language: English
• Published: New York Elsevier Limited 2012
• Subjects: Cardiology; Cardiovascular; Coronary vessels; Internal Medicine; NMR; Nuclear magnetic resonance; Prostheses
• ISSN: 0735-1097; 1558-3597
• DOI: 10.1016/j.jacc.2011.09.046

After pre-interventional evaluation using standard steady-state free-precession imaging with electrocardiographic gating and time-resolved retrospective image reconstruction (cine-TrueFISP retro) (TR, 40 ms; TE, 1.1 ms; flip angle, 62°; FOV, 380 × 330 mm2; matrix, 192 × 168; slice thickness, 6 mm; bandwidth, 930 Hz/pixel; image acquisition time, 15 s for a single slice acquired over 20 phases of the cardiac R-R interval) and electrocardiography-triggered, flow-sensitive, phase-contrast sequences (TR, 62 ms; TE, 3.5 ms; flip angle, 30°; FOV, 320 × 220 mm2; matrix, 192 × 132; bandwidth, 555 Hz/pixel; acquisition time, 1 min 52 s; velocity encoding value, 100 cm/s), TAVI was performed using rtMRI fluoroscopy based on a commercially available interactive real-time projection reconstruction TrueFISP sequence with radial k-space filling during free breathing and without cardiac triggering that was modified to achieve a frame rate of 7 frames per second (TR, 3.0 ms; TE, 1.5 ms; flip angle, 70°; FOV, 360 × 360 mm2; matrix, 192 × 192; bandwidth, 1530 Hz/pixel; slice thickness, 6 mm).