Abstract
Objective
We prospectively evaluated the feasibility and technical features of MR-guided lumbosacral injection procedures in open high-field MRI at 1.0 T.
Methods
In a CuSO4·5H2O phantom and five human cadaveric spines, fluoroscopy sequences (proton-density-weighted turbo spin-echo (PDw TSE), T1w TSE, T2w TSE; balanced steady-state free precession (bSSFP), T1w gradient echo (GE), T2w GE) were evaluated using two MRI-compatible 20-G Chiba-type needles. Artefacts were analysed by varying needle orientation to B0, frequency-encoding direction and slice orientation. Image quality was described using the contrast-to-noise ratio (CNR). Subsequently, a total of 183 MR-guided nerve root (107), facet (53) and sacroiliac joint (23) injections were performed in 53 patients.
Results
In vitro, PDw TSE sequence yielded the best needle–tissue contrasts (CNR = 45, 18, 15, 9, and 8 for needle vs. fat, muscle, root, bone and sclerosis, respectively) and optimal artefact sizes (width and tip shift less than 5 mm). In vivo, PDw TSE sequence was sufficient in all cases. The acquisition time of 2 s facilitated near-real-time MRI guidance. Drug delivery was technically successful in 100% (107/107), 87% (46/53) and 87% (20/23) of nerve root, facet and sacroiliac joint injections, respectively. No major complications occurred. The mean procedure time was 29 min (range 19–67 min).
Conclusion
MR-guided spinal injections in open high-field MRI are feasible and accurate using fast TSE sequence designs.
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Streitparth, F., Walter, T., Wonneberger, U. et al. Image-guided spinal injection procedures in open high-field MRI with vertical field orientation: feasibility and technical features. Eur Radiol 20, 395–403 (2010). https://doi.org/10.1007/s00330-009-1567-3
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DOI: https://doi.org/10.1007/s00330-009-1567-3