Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SMS MUSSELS: A Navigator-free Reconstruction for Simultaneous MultiSlice
  Accelerated MultiShot Diffusion Weighted Imaging   Purpose: To introduce a novel reconstruction method for simultaneous
multi-slice (SMS) accelerated multi shot diffusion weighted imaging (ms-DWI).
Methods: SMS acceleration using blipped CAIPI schemes have been proposed to
speed up the acquisition of ms-DWIs. The reconstruction of the above data
requires (i) phase compensation to combine data from different shots and (ii)
slice unfolding to separate the data of different slices. The traditional
approach is to first estimate the phase maps corresponding to each shot from a
navigator or from the slice-aliased individual shot data. The phase maps are
subsequently fed to a iterative reconstruction scheme to recover the slice
unfolded DWIs. We propose a novel reconstruction method to jointly recover the
slice-unfolded k-space data of the multiple shots. The proposed reconstruction
is enabled by the low-rank property inherent in the k-space samples of a ms-DW
acquisition. Specifically, we recover the missing samples of the multi-shot
acquisition by enforcing a low-rank penalty on the block-Hankel matrix formed
by the k-space data of each shot for each slice. The joint recovery of the
slice-unfolded k-space data is then performed using a SENSE-based
slice-unfolding subject to the low-rank constraint. The proposed joint recovery
scheme is tested on simulated and in-vivo data and compared to similar
un-navigated methods at slice acceleration factors of 2 and 3. Results: Our
experiments show effective slice unaliasing and successful recovery of DWIs
with minimal phase artifacts using the proposed method. The performance is
comparable to existing methods at low acceleration factors and better than
existing methods as the acceleration factor increase. Conclusion: For the slice
acceleration factors considered in this study, the proposed method can
successfully recover DWIs from SMS-accelerated ms-DWI acquisitions.

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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg