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Steady-State Free Precession MR Imaging: Improved Myocardial Tag Persistence and Signal-to-Noise Ratio for Analysis of Myocardial Motion¹

¹ From the Department of Radiology, Stanford University, Lucas MRI/S Center, 1201 Welch Rd, Rm P 284, Palo Alto, CA 94304. From the 2002 RSNA scientific assembly. Received February 4, 2003; revision requested April 22; revision received May 13; accepted June 26. Supported by National Institutes of Health grants R01 HL46347 and P41 RR09784, a DFG Fellowship, and a Kyle Mann grant. M.M. supported by an RSNA 2002 Research Trainee Prize. Address correspondence to M.M. (e-mail: markl@s-word.stanford.edu).

Tagging with balanced steady-state free-precession (SSFP) magnetic resonance (MR) imaging by using a steady-state storage scheme for myocardial motion analysis was evaluated. Signal-to-noise ratio (SNR), blood-tissue contrast, and tag persistence in volunteers and phantoms showed improved performance of SSFP imaging with tagging compared with that of radiofrequency spoiled gradient-echo (SPGR) MR imaging with tagging. Choice of flip angle with SSFP imaging involved a trade-off among SNR, blood-tissue contrast, and tag persistence. Increased SNR and tag persistence can be achieved simultaneously with SSFP imaging compared with SPGR tagging methods. As a result, the proposed technique may be useful for analysis of diastolic ventricular function.

© RSNA, 2004

Index terms: Magnetic resonance (MR), cine study, 511.12149 • Magnetic resonance (MR), k-space • Magnetic resonance (MR), motion studies, 511.12144 • Magnetic resonance (MR), pulse sequences, 511.121412, 511.121419 • Myocardium, MR, 511.1214, 511.121412, 511.121419

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