Significance and Outcome of Magnetic Resonance Enterography Revealing Sacroiliitis in Crohn's Disease: A Pilot Study

Subjects will undergo T1 and STIR sequence MRI of sacroiliac joints (SIJ ) (pelvis MRI) as well as SIJ plain X-ray for assessment of radiographic sacroiliitis. The study will utilize 3 Tesla with phased array coil to maximize signal to noise ratio for image quality. This is a single procedure, which takes about 60 minutes. 1 radiologists, blinded to all clinical information, will evaluate for presence of acute and structural lesions. Images will be scored for presence or absence of acute and/or structural lesions in a global manner.