Role of FCI in the Detection of Proctosigmoiditis Caused by IBD

Inclusion Criteria: * Participants with a diagnosis of proctosigmoiditis, on the basis of a compatible history and previous flexible sigmoidoscopy * Participants who are already under follow up in the NHS Grampian IBD clinic * Participants must be between 16 and 80 years old * Participants who meet the safety criteria for undergoing an MRI scan * Participants who are able to fit inside the scanner * Participants must be able to give fully informed consent * Participants must be mobile enough to be positioned onto the FCI scanner couch Exclusion Criteria: * MRI-incompatible conditions, as detected in the MRI safety screening sheet * Participants under 16 years old * Participants who are unable to communicate in English * Participants who are unable to give fully informed consent * Women who are pregnant * Restrictions to mobility that would prevent the correct positioning in the scanner * Previous major abdominal surgery * Any known significant comorbid disease that might interfere with treatment * Malignancy or other conditions that would significantly reduce life expectancy * Participants who suffer from claustrophobia