ArticleMagnetic resonance in medicine2025
Optimized MR pulse sequence for high-resolution brain 3D-T1ρ mapping with weighted spin-lock acquisitions.
Article in Magnetic resonance in medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Multiparametric quantitative magnetic resonance imaging of skeletal muscle in CKD.American journal of physiology. Renal physiology · 2025Article
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5 authors.
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Abstract
purposeTo implement and evaluate the feasibility of brain spin-lattice relaxation in the rotating frame (T1ρ) mapping using a novel optimized pulse sequence that incorporates weighted spin-lock acquisitions, enabling high-resolution three-dimensional (3D) mapping.
methodsThe optimized variable flip-angle framework, previously proposed for knee T1ρ mapping, was enhanced by integrating weighted spin-lock acquisitions. This strategic combination significantly boosts signal-to-noise ratio (SNR) while reducing data acquisition time, facilitating high-resolution 3D-T1ρ mapping of the brain. The proposed sequence was compared with magnetization-prepared angle-modulated partitioned k-space spoiled gradient-echo sequence snapshots (MAPSS).
resultsThe newly developed pulse sequence, tested for brain 3D-T1ρ mapping for the first time, obtained maps in 4 min with quality comparable to a 20-min MAPSS sequence. Specifically, the voxel-wise median absolute percentage difference between these MR sequences at a resolution of 0.9 × 0.9 × 3 mm
conclusionCompared with the 20-min MAPSS sequence for brain T1ρ mapping, the proposed learned high-resolution 3D pulse sequence simultaneously achieved a 2.3-fold improvement in effective (3.2-fold nominal) spatial resolution, a 1.1-fold improvement in SNR, and a 2.5-fold reduction in scan time.
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