Test-retest repeatability of motility MRI in healthy volunteers and patients with Crohn’s disease

Our study aims to determine test-retest repeatability in motility (bowel wall motion) index derived from CINE-MRI measured in involved and uninvolved small bowel in patients with Crohn’s disease and in healthy volunteers, to determine a clinically significant threshold of motility change in response to treatment. Motility was lower in the involved areas compared to uninvolved small bowel, and in the uninvolved small bowel ofpatients compared to that of healthy volunteers. We found moderate test-retest repeatability in the motility index of involved bowel (provide average CV) and in the ratio ofmotility indices in involved small bowel and in uninvolved small bowel.