DWI MR-enterography Without or With Bowel Cleansing to Assess Intestinal Inflammatory Activity in the Follow-up of Crohn's Disease

Study Overview
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Brief Summary
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Since 2009, many studies tend to prove the effectiveness of diffusion-weighted MR-enterography in the assessment of inflammatory activity in IBD compared to standard MR-enterography, with the emergence of new radiological scores such as the Clermont score. Diffusion-weighted MRI (DWI) is a faster technique and does not require the injection of gadoline contrast medium, which is a desirable in view of recent data on their long-term adverse effects (intracerebral deposits, nephrogenic systemic fibrosis). The advent of 3T MRI, which provides a better signal, a better spatial resolution or the same examination quality in a shorter time, seems promising for the future of DWI. However, to date, there are still few studies carried out at 3T in this field or even few studies on the possibility of doing away with bowel cleansing, although this is one of the main demands of patients. All patients will undergo a simplified MR-enterography, which includes four sequences, without bowel cleansing or injection. On the same day, the standard MR-enterography will be performed as in clinical practice, after ingestion of the usual oral preparation. Three reading sessions of the examination will be organized at intervals of at least one month by two radiologists specialized in digestive imaging, blinded to the clinical and

Official Title
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Assessment of Intestinal Inflammatory Activity in the Follow-up of Patients With Crohn's Disease: Diffusion-weighted MR-enterography, Without or With Bowel Cleansing, Compared With Standard MR-enterography

Conditions
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Crohn Disease, Bowel Cleansing, Apparent Diffusion Coefficient

Intervention / Treatment
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* Other: MR-enterography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Any patient diagnosed with Crohn's disease with bowel involvement for whom a MR-enterography was ordered as part of their follow-up Age ≥ 18 Subject's ability to understand and express opposition Affiliation to French social security system Exclusion Criteria: Any contraindication to MRI Allergy to gadolinium chelates Claustrophobia Major obesity that does not allow the patient to enter the machine's tunnel (whose diameter is 70 cm) Pregnant woman Person under curators or guardianship

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: MR-enterography<br> | Other: MR-enterography<br>* All patients will undergo a simplified MR-enterography, which includes four sequences, without bowel cleansing or injection. On the same day, the standard MR-enterography will be performed as in clinical practice, after ingestion of the usual oral preparation.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| variation of inflammatory activity localisation number in the main bowel | variation of inflammatory activity localisation number in the main bowel between diffusion entero-MRI with bowel cleansing versus standard enteroMRI | one day | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Crohn Disease, diffusion-weighted imaging, MR-enterography, bowel cleansing, apparent diffusion coefficient