Journal article
Multi-band multi-shot diffusion MRI reconstruction with joint usage of structured low-rank constraints and explicit phase mapping
Magnetic resonance in medicine, Vol.89(1), pp.95-111
01/2023
DOI: 10.1002/mrm.29422
PMCID: PMC9887994
PMID: 36063492
Abstract
Purpose
To develop a joint reconstruction method for multi-band multi-shot diffusion MRI.
Theory and Methods
Multi-band multi-shot EPI acquisition is an effective approach for high-resolution diffusion MRI, but requires specific algorithms to correct the inter-shot phase variations. The phase correction can be done by first estimating the explicit phase map and then feeding it into the k-space signal formulation model. Alternatively, the phase information can be used indirectly as structured low-rank constraints in k-space. The 2 methods differ in reconstruction accuracy and efficiency. We aim to combine the 2 different approaches for improved image quality and reconstruction efficiency simultaneously, termed “joint usage of structured low-rank constraints and explicit phase mapping” (JULEP). The proposed JULEP reconstruction is tested on both single-band and multi-band, multi-shot diffusion data, with different resolutions and b values. The results of JULEP are compared with conventional methods with explicit phase mapping (i.e., multiplexed sensitivity-encoding [MUSE]) and structured low-rank constraints (i.e., MUSSELS), and another joint reconstruction method (i.e., network estimated artifacts for tempered reconstruction [NEATR]).
Results
JULEP improves the quality of the navigator and subsequently facilitates the reconstruction of final diffusion images. Compared with all 3 other methods (MUSE, MUSSELS, and NEATR), JULEP mitigates residual structural bias and improves temporal SNRs in the final diffusion image, particularly at high multi-band factors. Compared with MUSSELS, JULEP also improves computational efficiency.
Conclusion
The proposed JULEP method significantly improves the image quality and reconstruction efficiency of multi-band multi-shot diffusion MRI, which can promote a broader application of high-resolution diffusion MRI.
Details
- Title: Subtitle
- Multi-band multi-shot diffusion MRI reconstruction with joint usage of structured low-rank constraints and explicit phase mapping
- Creators
- Erpeng DaiMerry ManiJennifer A McNab
- Resource Type
- Journal article
- Publication Details
- Magnetic resonance in medicine, Vol.89(1), pp.95-111
- DOI
- 10.1002/mrm.29422
- PMID
- 36063492
- PMCID
- PMC9887994
- NLM abbreviation
- Magn Reson Med
- ISSN
- 0740-3194
- eISSN
- 1522-2594
- Grant note
- DOI: 10.13039/100006775, name: GE Healthcare; DOI: 10.13039/100006599, name: Focused Ultrasound Foundation
- Language
- English
- Electronic publication date
- 09/05/2022
- Date published
- 01/2023
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Iowa Neuroscience Institute
- Record Identifier
- 9984296999502771
Metrics
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