Academic Journal

GRACE-MORE: A Motion-Resolved Golden-Angle Radial CEST MRI Technique for Free-Breathing Abdominal Imaging.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: GRACE-MORE: A Motion-Resolved Golden-Angle Radial CEST MRI Technique for Free-Breathing Abdominal Imaging.
Συγγραφείς: Fan Y; Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, Fujian, China., Bie C; Key Laboratory for Magnetic Resonance and Multimodality Imaging of Guangdong Province, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China., Jiang X; Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, Fujian, China., Chen Z; Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, Fujian, China., Li M; Department of Cardiovascular Medicine, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China., Zhou Y; Key Laboratory for Magnetic Resonance and Multimodality Imaging of Guangdong Province, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China., Chen L; Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, Fujian, China.
Πηγή: Magnetic resonance in medicine [Magn Reson Med] 2026 Sep; Vol. 96 (3), pp. 1443-1457. Date of Electronic Publication: 2026 May 14.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Wiley Country of Publication: United States NLM ID: 8505245 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1522-2594 (Electronic) Linking ISSN: 07403194 NLM ISO Abbreviation: Magn Reson Med Subsets: MEDLINE
Imprint Name(s): Publication: 1999- : New York, NY : Wiley
Original Publication: San Diego : Academic Press
Ιατρικοί όροι (MeSH): Magnetic Resonance Imaging*/methods , Abdomen*/diagnostic imaging , Image Processing, Computer-Assisted*/methods, Algorithms ; Humans ; Respiration ; Motion ; Phantoms, Imaging ; Animals ; Movement ; Reproducibility of Results ; Computer Simulation ; Principal Component Analysis
Περίληψη: Purpose: To develop a motion-resolved acquisition and reconstruction framework for motion-robust and spectrally reliable abdominal CEST imaging under free-breathing conditions.
Theory and Methods: A framework termed Golden-angle RAdial CEST MRI with MOtion-REsolved reconstruction (GRACE-MORE) was developed to improve acquisition, respiratory-phase binning, and reconstruction. An interleaved steady-state saturation module with golden-angle radial sampling was adopted to enhance saturation efficiency and ensure uniform k-space coverage. Respiratory-phase binning was performed using a self-gated strategy, in which respiratory amplitude and phase were extracted from central k-space via principal component analysis, followed by hybrid empirical mode decomposition-continuous wavelet transform sorting to correct baseline drift and irregular breathing. Reconstruction was performed using a deep unrolled network constrained by low-rank and sparsity priors, which incorporated a modified U-Net with channel attention and a sliding-window grouping scheme to capture spatio-spectral correlations across saturation offsets.
Results: Validation on simulated, preclinical, and clinical datasets demonstrated more than a threefold improvement in binning accuracy compared with conventional methods. GRACE-MORE reduced reconstruction error, yielded a higher structural similarity index and peak signal-to-noise ratio in simulations, and achieved improved anatomical fidelity, effective motion suppression, and up to a fourfold increase in Z-spectral signal-to-noise ratio in vivo.
Conclusion: GRACE-MORE enables motion-robust and spectrally reliable abdominal CEST imaging under free-breathing conditions.
(© 2026 International Society for Magnetic Resonance in Medicine.)
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Grant Information: JCYJ20220818101213029 Shenzhen Science and Technology Program; 20720240026 President Fund of Xiamen University; Xiamen University Nanqiang Outstanding Talents Program; 62501584 National Natural Science Foundation of China; 82302151 National Natural Science Foundation of China; 82572163 National Natural Science Foundation of China
Contributed Indexing: Keywords: chemical exchange saturation transfer; deep learning; free‐breathing; golden‐angle; image reconstruction; motion‐resolved
Entry Date(s): Date Created: 20260515 Date Completed: 20260702 Latest Revision: 20260702
Update Code: 20260703
DOI: 10.1002/mrm.70434
PMID: 42136143
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1522-2594
DOI:10.1002/mrm.70434