Magnetic resonance imaging
PsA
INVERSION
A subset of the total study PsA cohort, including patients from the second and third randomization block, underwent MRI of the SIJ and spine at baseline, and at 3 months of follow up, at average 13 (range: 8 – 26) days after completion of the intervention. MRIs were obtained using two 1.5 T routine whole body MR scanners. A Short Tau Inversion Recovery (STIR) sequence and a T1-weighted turbo spin-echo sequence (TSE) based on a standardized protocol were applied in the semi-coronal scan plane of the SIJs and in the sagittal scan plane for the spine were used for examination of BME [The data on MRI spine has previously been methodologically described [