Normal Values of Magnetic Relaxation Parameters of Spine Components with the Synthetic MRI Sequence

AJNR. American Journal of Neuroradiology
M Drake-PérezM I Vargas

Abstract

SyMRI is a technique developed to perform quantitative MR imaging. Our aim was to analyze its potential use for measuring relaxation times of normal components of the spine and to compare them with values found in the literature using relaxometry and other techniques. Thirty-two spine MR imaging studies (10 cervical, 5 dorsal, 17 lumbosacral) were included. A modified multiple-dynamic multiple-echo sequence was added and processed to obtain quantitative T1 (millisecond), T2 (millisecond), and proton density (percentage units [pu]) maps for each patient. An ROI was placed on representative areas for CSF, spinal cord, intervertebral discs, and vertebral bodies, to measure their relaxation. Relaxation time means are reported for CSF (T1 = 4273.4 ms; T2 = 1577.6 ms; proton density = 107.5 pu), spinal cord (T1 = 780.2 ms; T2 = 101.6 ms; proton density = 58.7 pu), normal disc (T1 = 1164.9 ms; T2 = 101.9 ms; proton density = 78.9 pu), intermediately hydrated disc (T1 = 723 ms; T2 = 66.8 ms; proton density = 60.8 pu), desiccated disc (T1 = 554.4 ms; T2 = 55.6 ms; proton density = 47.6 ms), and vertebral body (T1 = 515.3 ms; T2 = 100.8 ms; proton density = 91.1 pu). Comparisons among the mean T1, T2, and proton density values showed sig...Continue Reading

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Citations

Aug 4, 2018·AJNR. American Journal of Neuroradiology·M I VargasS Boudabous
Apr 28, 2020·Journal of Magnetic Resonance Imaging : JMRI·Bo YangGrace D O'Connell
Nov 1, 2018·European Radiology Experimental·Fabio GalbuseraLuca Maria Sconfienza
Dec 5, 2021·Insights Into Imaging·Sana BoudabbousMaria Isabel Vargas

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