3D CRANI, a novel MR neurography sequence, can reliable visualise the extraforaminal cranial and occipital nerves

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Abstract

Objectives: We aim to validate 3D CRANI, a novel high-field STIR TSE, MR neurography sequence in the visualisation of the extraforaminal cranial and occipital nerve branches on a 3-T system. Furthermore, we wish to evaluate the role of gadolinium administration and calculate nerve benchmark values for future reference. Methods: Eleven consecutive patients underwent MR imaging including the 3D CRANI sequence before and immediately after intravenous gadolinium administration. Two observers rated suppression quality and nerve visualisation using Likert scales before and after contrast administration. Extraforaminal cranial and occipital nerves were assessed. Nerve calibers and signal intensities were measured at predefined anatomical landmarks, and apparent signal intensity ratios were calculated. Results: The assessed segments of the cranial and occipital nerves could be identified in most cases. The overall intrarater agreement was 79.2% and interrater agreement was 82.7% (intrarater κ =.561, p

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Casselman, J., Van der Cruyssen, F., Vanhove, F., Peeters, R., Hermans, R., Politis, C., & Jacobs, R. (2023). 3D CRANI, a novel MR neurography sequence, can reliable visualise the extraforaminal cranial and occipital nerves. European Radiology, 33(4), 2861–2870. https://doi.org/10.1007/s00330-022-09269-2

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