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Abstract #3517

Diffusion-Weighted PROPELLER with a Novel Unaliasing Technique for Small Field of View Imaging

Zhiqiang Li1, Donglai Huo2, Xiaoli Zhao1, Ajeetkumar Gaddipati1, James Pipe2

1GE Healthcare, Waukesha, WI, USA; 2Barrow Neurological Institute, Phoenix, AZ, USA

Split-blade PROPELLER was introduced for diffusion-weighted (DW) imaging to avoid image distortion. When imaging a small field of view of a large object, No-Phase-Wrap (NPW) is usually applied to remove aliasing, with a trade off in blade width and scan time. In this work a new method based on parallel imaging techniques was proposed to effectively eliminate the aliasing for DW-PROPELLER. The feasibility is demonstrated in phantom and spine imaging with image quality comparable to conventional NPW but without the loss of scan time or blade width.