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European Radiology

, Volume 17, Issue 11, pp 2872–2879 | Cite as

Feasibility of a RARE-based sequence for quantitative diffusion-weighted MRI of the spine

  • J. G. Raya
  • O. Dietrich
  • C. Birkenmaier
  • J. Sommer
  • M. F. Reiser
  • A. Baur-Melnyk
Musculoskeletal

Abstract

The feasibility of a diffusion-weighted single-shot fast-spin-echo sequence for the diagnostic work-up of bone marrow diseases was assessed. Twenty healthy controls and 16 patients with various bone marrow pathologies of the spine (bone marrow edema, tumor and inflammation) were examined with a diffusion-weighted single-shot sequence based on a modified rapid acquisition with relaxation enhancement (mRARE) technique; four diffusion weightings (b-values: 50, 250, 500 and 750 s/mm2) in three orthogonal orientations were applied. Apparent diffusion coefficients (ADCs) were determined in the bone marrow and in the intervertebral discs of healthy volunteers and in diseased bone marrow. Ten of the 20 volunteers were repeatedly scanned within 30 min to examine short-time reproducibility. Spatial reproducibility was assessed by measuring ADCs in two different slices including the same lesion in 12 patients. The ADCs of the lesions exhibited significantly higher values, (1.27 ± 0.32)×10−3 mm2/s, compared with healthy bone marrow, (0.21 ± 0.10)×10−3 mm2/s. Short-time and spatial reproducibility had a mean coefficient of variation of 2.1% and 6.4%, respectively. The diffusion-weighted mRARE sequence provides a reliable tool for determining quantitative ADCs in vertebral bone marrow with adequate image quality.

Keywords

Magnetic resonance (MR) Diffusions study magnetic resonance (MR) Bone marrow disease Tissue characterization 

Notes

Acknowledgments

This work was supported by the Deutsche Forschungsgemeinschaft (DFG), Grant No. BA-2089(1–3).

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • J. G. Raya
    • 1
  • O. Dietrich
    • 1
  • C. Birkenmaier
    • 2
  • J. Sommer
    • 1
  • M. F. Reiser
    • 1
  • A. Baur-Melnyk
    • 1
  1. 1.Department of Clinical RadiologyUniversity of Munich-GroßhadernMunichGermany
  2. 2.Department of Orthopedic SurgeryUniversity of Munich-GroßhadernMunichGermany

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