Dual Half-Echo Phase Correction for Implementation of 3D Radial SSFP at 3.0 T
Dual Half-Echo Phase Correction for Implementation of 3D Radial SSFP at 3.0 T
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DOI：
10.1002/mrm.22284
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发表时间：
2010-02-01
影响因子：
3.3
通讯作者：
Block, Walter F.
中科院分区：
文献类型：
--
作者：
Klaers, Jessica;Jashnani, Yogesh;Block, Walter F.
Fat/water separation methods such as fluctuating equilibrium magnetic resonance and linear combination steady-state free precession have not yet been successfully implemented at 3.0 T due to extreme limitations on the time available for spatial encoding with the increase in magnetic field strength. We present a method to utilize a three-dimensional radial sequence combined with linear combination steady-state free precession at 3.0 T to take advantage of the increased signal levels over 1.5 T and demonstrate high spatial resolution compared to Cartesian techniques. We exploit information from the two half-echoes within each pulse repetition time to correct the accumulated phase on a point-by-point basis, thereby fully aligning the phase of both half-echoes. The correction provides reduced sensitivity to static field (B-0) inhomogeneity and robust fat/water separation. Resultant images in the knee joint demonstrate the necessity of such a correction, as well as the increased isotropic spatial resolution attainable at 3.0 T. Results of a clinical study comparing this sequence to conventional joint imaging sequences are included. Magn Reson Med 63:282-289, 2010. (C) 2010 Wiley-Liss, Inc.
