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Coronary MR Angiography: True FISP Imaging Improved by Prolonging Breath Holds with Preoxygenation in Healthy Volunteers¹

¹ From the Departments of Radiology (R.M.M., S.M.S., V.S.D., J.D.G., F.S.P., J.C.C., J.P.F., D.L.) and Biomedical Engineering (S.M.S., V.S.D., J.D.G., D.L.), Northwestern University Medical School, Suite 700, 448 E Ontario St, Chicago, IL 60611. Received August 22, 2001; revision requested October 11; final revision received August 6, 2002; accepted August 20. Supported in part by grant HL 38698 from the National Institutes of Health and by Siemens Medical Solutions, Erlangen, Germany. Address correspondence to D.L. (e-mail: d-li2@northwestern.edu).

In 15 healthy volunteers undergoing coronary magnetic resonance (MR) angiography, the breath-hold duration with and without preoxygenation was measured. The effect of preoxygenation on coronary artery imaging was also evaluated. A three-dimensional magnetization-prepared true fast imaging with steady-state precession sequence was employed for coronary MR angiography. All subjects showed an increase in comfortable breath-hold duration with preoxygenation. This extra imaging time allowed coronary artery imaging with increased spatial resolution.

© RSNA, 2003

Index terms: Coronary vessels, MR, 54.12142, 54.121416 • Magnetic resonance (MR), pulse sequences, 54.12142, 54.121416 • Magnetic resonance (MR), rapid imaging, 54.12142, 54.121416 • Magnetic resonance (MR), vascular studies, 54.12142, 54.121416

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