• verification of inclusion and non-inclusion criteria
• information and collection of consent
• standard imaging protocol prescribed as part of the usual treatment: sagittal T1 and T2 slices after injection of contrast product (Gadolinium), 3D STIR and 3D PSIR sequence.
• 3D FGAPSIR sequence at the level of the cervical cord for the duration of the additional sequence is 10 minutes, for a total examination time of 40 minutes (instead of 30 minutes)

• verification of inclusion and non-inclusion criteria
• information and collection of consent
• standard imaging protocol prescribed as part of the usual treatment: sagittal T1 and T2 slices after injection of contrast product (Gadolinium), 3D STIR and 3D PSIR sequence.
• 3D FGAPSIR sequence at the level of the cervical cord for the duration of the additional sequence is 10 minutes, for a total examination time of 40 minutes (instead of 30 minutes)

Inclusion Criteria:

• Patient over 18 years old
• To benefit from a medullary exploration planned by 3T MRI as part of a first evaluation or a reassessment of inflammatory involvement of the nevrax
• Express consent to participate in the study
• Affiliate or beneficiary of a social security scheme

Exclusion Criteria:

• Patient benefiting from a legal protection measure
• Pregnant, parturient or breastfeeding woman
• Absolute or relative contraindication to MRI

The study will be offered prospectively to patients presenting to the imaging department for a 3T MRI for bone marrow exploration, in the context of inflammatory involvement of the nevrax