Improved Simultaneous Multi-slice imaging with Composition of k-space Interpolations (SMS-COOKIE) for myocardial T1 mapping

Journal article (2023)

Authors

Ömer Burak Demirel University of Minnesota
S.D. Weingärtner ImPhys/Weingärtner group - AS , ImPhys/Computational Imaging - AS
Steen Moeller University of Minnesota
Mehmet Akcakaya University of Minnesota
Research Group
ImPhys/Computational Imaging (AS) (TU Delft)
Copyright: © 2023 Ömer Burak Demirel, S.D. Weingärtner, Steen Moeller, Mehmet Akçakaya
DOI: https://doi.org/10.1371/journal.pone.0283972
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Published Date

2023

Language

English

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Computational Imaging

Abstract

The aim of this study is to develop and evaluate a regularized Simultaneous Multi-Slice (SMS) reconstruction method for improved Cardiac Magnetic Resonance Imaging (CMR). The proposed reconstruction method, SMS with COmpOsition of k-space IntErpolations (SMS-COOKIE) combines the advantages of Iterative Self-consistent Parallel Imaging Reconstruction (SPIRiT) and split slice-Generalized Autocalibrating Partially Parallel Acquisitions (GRAPPA), while allowing regularization for further noise reduction. The proposed SMS-COOKIE was implemented with and without regularization, and validated using a Saturation Pulse-Prepared Heart rate Independent inversion REcovery (SAPPHIRE) myocardial T
1 mapping sequence. The performance of the proposed reconstruction method was compared to ReadOut (RO)–SENSE-GRAPPA and split slice-GRAPPA, on both retrospectively and prospectively three-fold SMS-accelerated data with an additional two-fold in-plane acceleration. All SMS reconstruction methods yielded similar T
1 values compared to single band imaging. SMS-COOKIE showed lower spatial variability in myocardial T
1 with significant improvement over RO-SENSE-GRAPPA and split slice-GRAPPA (P < 10
−4). The proposed method with additional locally low rank (LLR) regularization reduced the spatial variability, again with significant improvement over RO-SENSE-GRAPPA and split slice-GRAPPA (P < 10
−4). In conclusion, improved reconstruction quality was achieved with the proposed SMS-COOKIE, which also provided lower spatial variability with significant improvement over split slice-GRAPPA.

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