Comparative Effectiveness of MR Enterography

Computed Tomography (CT) is an imaging tool that exposes patients to radiation, and until
recently it was the most commonly used imaging method to evaluate small bowel Crohn disease.
Recently, Magnetic Resonance Enterography (MRE) which is a form of magnetic resonance
imaging that provides detailed images of the bowel and less frequently, Ultrasound (US) are
replacing CT as the standard of care imaging tool at some institutions.

The investigators would like to determine how effective US imaging is compared to MRI
imaging in accurately diagnosing and following SBCD in children. Along with enteric
ultrasound (EnUS) we will also be comparing a new ultrasound technology called Ultrasound
Elastography Imaging (UEI) for this study in which we will be using a second form of UEI
called Acoustic Radiation Force Impulse (ARFI). This technique uses sound waves to asses the
stiffness properties of soft tissue. The study will compare costs, patient preferences, and
imaging accuracy.

Inclusion Criteria:

- Pediatric patients under 18 years age.

- Recently diagnosed with small bowel crohn's disease and have not received any prior
treatment for this condition

Exclusion Criteria:

- Are pregnant.

- Require sedation to have the MRE exam.

- Cannot tolerate small enclosed spaces for 60 minutes.

- Have kidneys that are poorly functioning (eGFR <30ml/min)