High-resolution magnetization transfer MRI in patients with cervical spondylotic myelopathy

Linda I. Suleiman, Kenneth A. Weber, Brett D. Rosenthal*, Surabhi A. Bhatt, Jason W. Savage, Wellington K. Hsu, Alpesh A. Patel, Todd B. Parrish

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Magnetization transfer (MT) contrast has been established as a marker of myelin integrity, and cervical spondylotic myelopathy is known to cause demyelination. Ten patients with clinical and magnetic resonance imaging (MRI) manifestations of cervical spondylotic myelopathy (CSM) were compared to the MRIs of seven historic healthy controls, using the magnetization transfer ratio (MTR) and Nurick scores as the primary metrics. Transverse slices through the intervertebral discs of the cervical spine were acquired using a gradient echo sequence (MEDIC) with and without an MT saturation pulse on a 3 Tesla Siemens Prisma scanner (TR = 300 ms, TEeff = 17 ms, flip angle = 30° in-plane resolution = 0.47 × 0.47 mm2). The CSM patients tended to have a lower mean MTR (30.4 ± 6.5) than the controls (34.8 ± 3.8), but the difference was not significant (independent samples t-test, p = 0.110, Cohen's d = 0.80). The mean MTR across all intervertebral disc levels was not significantly correlated to the Nurick score (Spearman's ρ = −0.489, p = 0.151). The intervertebral level with the lowest MTR in each cohort was not significantly different between groups (equal variances not assumed, t = 1.965, dof = 14.8, p = 0.068, Cohen's d = 0.88), but the CSM patients tended to have a lower MTR. The mean MTR at this level was negatively correlated to the Nurick score among CSM patients (Spearman's ρ = −0.725, p = 0.018). CSM patients tended to have decreased MTR indicating myelin degradation compared to our healthy subjects, and MTR was negatively correlated with the severity of CSM.

Original languageEnglish (US)
Pages (from-to)57-61
Number of pages5
JournalJournal of Clinical Neuroscience
Volume51
DOIs
StatePublished - May 2018

Keywords

  • Cervical spondylosis
  • Diagnostic imaging
  • Magnetization transfer contrast imaging
  • Myelopathy

ASJC Scopus subject areas

  • Surgery
  • Neurology
  • Clinical Neurology
  • Physiology (medical)

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