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Published online before print April 24, 2003, 10.1148/radiol.2273020148
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(Radiology 2003;227:877-882.)
© RSNA, 2003

Technical Developments

Cardiac MR Imaging with External Respirator: Synchronizing Cardiac and Respiratory Motion—Feasibility Study1

Sven Plein, MD, Sudantha Bulugahapitiya, MD, Tim R. Jones, BSc, Gavin J. Bainbridge, BSc, John P. Ridgway, PhD and Mohan U. Sivananthan, MD

1 From the Cardiac Magnetic Resonance Unit (S.P., S.B., T.R.J., G.J.B., M.U.S.) and Department of Medical Physics (J.P.R.), General Infirmary at Leeds, Great George St, Rm 170, D-floor, Jubilee Wing, Leeds LS1 3EX, England. Received February 25, 2002; revision requested April 24; final revision received August 29; accepted September 30. S.P. supported by a British Heart Foundation Research Fellowship. Address correspondence to S.P. (e-mail: sven.plein@leedsth.nhs.uk).

The feasibility of electrocardiography (ECG)-synchronized respiration with an external cuirass-type respirator in cardiac magnetic resonance (MR) imaging was evaluated. Cardiac MR imaging was performed in 10 nonsedated healthy volunteers with an ECG-triggered external respirator that was modified for use in the MR environment. Coronary MR angiograms and multiphase gradient-echo cine images were acquired with one respiratory cycle performed per cardiac cycle. The technique was feasible and in this group of volunteers resulted in equivalent image quality but shorter acquisition times than those of conventional free-breathing and breath-holding techniques.

© RSNA, 2003

Index terms: Heart, MR, 524.12142, 541.12142, 542.12142 • Magnetic resonance (MR), functional imaging, 524.12142, 541.12142, 542.12142 • Magnetic resonance (MR), motion correction, 524.12144, 541.12144, 542.12144 • Magnetic resonance (MR), vascular studies, 524.12142, 541.12142, 542.12142






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