Bi-exponential 23 Na T2 * component analysis in the human brain

NMR in Biomedicine
Frank RiemerXavier Golay

Abstract

The purpose of this study was to measure the sodium transverse relaxation time T2 * in the healthy human brain. Five healthy subjects were scanned with 18 echo times (TEs) as short as 0.17 ms. T2 * values were fitted on a voxel-by-voxel basis using a bi-exponential model. Data were also analysed using a continuous distribution fit with a region of interest-based inverse Laplace transform. Average T2 * values were 3.4 ± 0.2 ms and 23.5 ± 1.8 ms in white matter (WM) for the short and long components, respectively, and 3.9 ± 0.5 ms and 26.3 ± 2.6 ms in grey matter (GM) for the short and long components, respectively, using the bi-exponential model. Continuous distribution fits yielded results of 3.1 ± 0.3 ms and 18.8 ± 3.2 ms in WM for the short and long components, respectively, and 2.9 ± 0.4 ms and 17.2 ± 2 ms in GM for the short and long components, respectively. 23 Na T2 * values of the brain for the short and long components for various anatomical locations using ultra-short TEs are presented for the first time.

References

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Citations

Jan 18, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Warda SyedaLeigh A Johnston
Dec 17, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·James T GristChristoffer Laustsen
Jun 2, 2020·Journal of Magnetic Resonance Imaging : JMRI·Bhavana S SolankyClaudia A M Gandini Wheeler-Kingshott
Nov 10, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ahmad A AlhulailUzay E Emir
Jul 17, 2021·Magnetic Resonance Imaging·Mark BydderBenjamin M Ellingson
Oct 16, 2021·NMR in Biomedicine·Paul PolakMichael D Noseworthy

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