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This is a Quantitative Study study (also classified as: Human Clinical Trial).

Phosphorylated metabolite T1 relaxation times measured in the macaque brain using 31P MRS at 11.7T

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T1 relaxation times for phosphodiesters and Pi were measured at 2.6 to 3.0 s, indicating significant variability among metabolites.
Phosphocreatine showed T1 values of around 2.4 s, while phosphoethanolamine had a T1 of 3.6 s, underscoring the diversity of metabolite behaviors.
Using semi-LASER and STEAM sequences, inversion-recovery acquisitions minimized muscle signal contamination during measurements.
These findings highlight the importance of accurate T1 times for effective 31P metabolite quantification in high-field magnetic resonance studies.

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Inversion-recovery acquisitions determined T1 times for phosphorylated metabolites in macaque brains, suggesting improved 31P MRSI analysis.

Kolkovsky et al. (2025) studied this question.

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Inversion-recovery acquisitions determined T1 times for phosphorylated metabolites in macaque brains, suggesting improved 31P MRSI analysis.