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Abstract #0616

Reduced Blurring in 3D Fast Spin Echo through Joint Temporal ESPIRiT Reconstruction

Jonathan I. Tamir 1 , Peng Lai 2 , Martin Uecker 1 , and Michael Lustig 1

1 Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, United States, 2 Global Applied Science Laboratory, GE Healthcare, Menlo Park, CA, United States

Volumetric Fast Spin Echo (FSE) is an attractive alternative to 2D FSE as it provides isotropic resolution. Because 3D FSE employs long echo trains to reduce scan time, the resulting image suffers from blurring due to T2 decay. In this work, we model the temporal behavior of the acquisition to reconstruct a full time series of images. In addition to exploiting parallel imaging and spatial sparsity, we constrain the temporal decay to a low-dimensional subspace. We show that randomizing the echo train ordering in tandem with this temporal model can produce a multi-contrast time series of images with reduced blurring.

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