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- Title
Biochemical imaging of cervical intervertebral discs with glycosaminoglycan chemical exchange saturation transfer magnetic resonance imaging: feasibility and initial results.
- Authors
Schleich, Christoph; Müller-Lutz, Anja; Zimmermann, Lisa; Boos, Johannes; Schmitt, Benjamin; Wittsack, Hans-Jörg; Antoch, Gerald; Miese, Falk; Müller-Lutz, Anja; Wittsack, Hans-Jörg
- Abstract
<bold>Objective: </bold>To evaluate glycosaminoglycan chemical exchange saturation transfer (gagCEST) imaging at 3T in the assessment of the GAG content of cervical IVDs in healthy volunteers.<bold>Materials and Methods: </bold>Forty-two cervical intervertebral discs of seven healthy volunteers (four females, three males; mean age: 21.4 ± 1.4 years; range: 19-24 years) were examined at a 3T MRI scanner in this prospective study. The MRI protocol comprised standard morphological, sagittal T2 weighted (T2w) images to assess the magnetic resonance imaging (MRI) based grading system for cervical intervertebral disc degeneration (IVD) and biochemical imaging with gagCEST to calculate a region-of-interest analysis of nucleus pulposus (NP) and annulus fibrosus (AF).<bold>Results: </bold>GagCEST of cervical IVDs was technically successful at 3T with significant higher gagCEST values in NP compared to AF (1.17% ± 1.03% vs. 0.79% ± 1.75%; p = 0.005). We found topological differences of gagCEST values of the cervical spine with significant higher gagCEST effects in lower IVDs (r = 1; p = 0). We could demonstrate a significant, negative correlation between gagCEST values and cervical disc degeneration of NP (r = -0.360; p = 0.019). Non-degenerated IVDs had significantly higher gagCEST effects compared to degenerated IVDs in NP (1.76% ± 0.92% vs. 0.52% ± 1.17%; p < 0.001).<bold>Conclusion: </bold>Biochemical imaging of cervical IVDs is feasible at 3T. GagCEST analysis demonstrated a topological GAG distribution of the cervical spine. The depletion of GAG in the NP with increasing level of morphological degeneration can be assessed using gagCEST imaging.
- Subjects
INTERVERTEBRAL disk radiography; BIOCHEMISTRY; GLYCOSAMINOGLYCANS; SPINE; NEURODEGENERATION; MAGNETIC resonance imaging; CERVICAL vertebrae; DIAGNOSTIC imaging; INTERVERTEBRAL disk; MOLECULAR diagnosis; NUCLEAR magnetic resonance spectroscopy; REFERENCE values; PILOT projects
- Publication
Skeletal Radiology, 2016, Vol 45, Issue 1, p79
- ISSN
0364-2348
- Publication type
journal article
- DOI
10.1007/s00256-015-2251-0