ArticleNMR in biomedicine2025
Orientation-independent quantification of macromolecular proton fraction in tissues with suppression of residual dipolar coupling.
Article in NMR in biomedicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Adiabatic Pulse Shape Influence on the Orientation Dependence of TMagnetic resonance in medicine · 2026Article
- Dipolar Order Mapping Based on Spin-Lock Magnetic Resonance Imaging.NMR in biomedicine · 2026Article
- Quantitative macromolecular proton fraction imaging using pulsed spin-lock.Magnetic resonance in medicine · 2025Article
- Orientation-independent quantification of macromolecular proton fraction in tissues with suppression of residual dipolar coupling.NMR in biomedicine · 2025Article
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Authors and funding
7 authors.
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Abstract
Quantitative magnetization transfer (MT) imaging enables noninvasive characterization of the macromolecular environment of tissues. However, recent work has highlighted that the quantification of MT parameters using saturation radiofrequency (RF) pulses exhibits orientation dependence in ordered tissue structures, potentially confounding its clinical applications. Notably, in tissues with ordered structures, such as articular cartilage and myelin, the residual dipolar coupling (RDC) effect can arise owing to incomplete averaging of dipolar-dipolar interactions of water protons. In this study, we demonstrated the confounding effect of RDC on quantitative MT imaging in ordered tissues can be suppressed by using an emerging technique known as macromolecular proton fraction mapping based on spin-lock (MPF-SL). The off-resonance spin-lock RF pulse in MPF-SL could be designed to generate a strong effective spin-lock field to suppress RDC without violating the specific absorption rate and hardware limitations in clinical scans. Furthermore, suppressing the water pool contribution in MPF-SL enabled the application of a strong effective spin-lock field without confounding effects from direct water saturation. Our findings were experimentally validated using human knee specimens and healthy human cartilage. The results demonstrated that MPF-SL exhibits lower sensitivity to tissue orientation compared with
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