Abstract #4305

Data Acquisition Strategies for Reducing Eddy-Current and Transient Oscillation Artifacts in Balanced Steady-State Free Precession

Hyun-Soo Lee¹, Seung Hong Choi², and Sung-Hong Park¹

¹Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea, Republic of, ²Department of Radiology, Seoul National University College of Medicine, Seoul, Korea, Republic of

The quality of balanced steady-state free precession is vulnerable to eddy-currents and transient oscillations. However, the conventional centric phase-encoding (PE) scheme makes these artifacts severe, thus needs additional compensation strategies. In this study, we propose an improved PE scheme where k-space is encoded from center to periphery in a group-wise manner (PE-grouping). This reduces related artifacts by preventing big jumps in k-space along PE direction. Also proposed were various averaging strategies that could further eliminate the residual artifacts by averaging two full images acquired not only with the PE-grouping, but also with the conventional centric and pairing schemes.

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